Relevant bibliographies by topics / Magnesium sheet metals

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Magnesium sheet metals'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Magnesium sheet metals"

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Watanabe, Takehiko, and K. Oohara. "Brazing of AZ31B Magnesium Alloy Sheet." Materials Science Forum 539-543 (March 2007): 1603–8. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1603.

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This study was carried out to newly develop the fluxes and filler metals for brazing magnesium alloy AZ31B more easily at lower temperatures. Furthermore, surface preparation was developed to improve the brazeability of magnesium alloy. The main results obtained are as follows. We could successfully develop the fluxes that consisted of chlorides containing Ca ion and Li ion, which made the faying surface of the magnesium alloy active at around 450°C. In addition, we succeeded in developing the filler metals with the melting temperatures lower than 490°C which were Mg-Sn-In system containing a small amount of Al to lower the melting temperature. Surface preparation for magnesium alloy by immersion in aqueous solution containing halogen ion improved remarkably the brazeability of the magnesium alloy. Using the surface preparation together, the fluxes and filler metals could achieve the brazed joints with a high strength equivalent to that of the base metal.
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HINO, R., F. YOSHIDA, N. NAGAISHI, and T. NAKA. "INCREMENTAL SHEET FORMING WITH LOCAL HEATING FOR LIGHTWEIGHT HARD-TO-FORM MATERIAL." International Journal of Modern Physics B 22, no. 31n32 (2008): 6082–87. http://dx.doi.org/10.1142/s0217979208051613.

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A new incremental sheet forming technology with local heating is proposed to form lightweight hard-to-form sheet metals such as aluminum-magnesium alloy (JIS A5083) sheet or magnesium alloy (JIS AZ31) sheet. The newly designed forming tool has a built-in heater to heat the sheet metal locally and increase the material ductility around the tool-contact point. Incremental forming experiments of A5083 and AZ31 sheets are carried out at several tool-heater temperatures ranging from room temperature to 873K using the new forming method. The experimental results show that the formability of A5083 and AZ31 sheets increases remarkably with increasing local-heating temperature. In addition, springback of formed products decreases with increasing local-heating temperature. The developed incremental sheet forming method with local heating has great advantages in not only formability but also shape fixability. It is an effective forming method for lightweight hard-to-form sheet metal for small scale productions.
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Otsu, Masaaki. "Excellent Formability of Light Metals Sheets by Friction Stir Incremental Forming." Key Engineering Materials 716 (October 2016): 3–10. http://dx.doi.org/10.4028/www.scientific.net/kem.716.3.

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The results about friction stir incremental forming of light metals sheets from the beginning of development to the latest in the author’s laboratory are introduced. Comparison of formability by the conventional single point incremental sheet metal forming and friction stir incremental forming for magnesium alloys, aluminum alloys and titanium sheets were introduced. Effect of tool rotation direction, multistage forming and double side forming are also introduced.
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Stutz, Lennart, Julian Quade, Michael Dahms, Dietmar Letzig, and Karl Ulrich Kainer. "Achievements in Deep Drawing of Magnesium Alloy Sheets." Materials Science Forum 690 (June 2011): 302–5. http://dx.doi.org/10.4028/www.scientific.net/msf.690.302.

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Magnesium alloy sheets bear significant potential in replacing conventional materials such as aluminium and steels in ultra lightweight designs. High specific strength and stiffness, combined with the lowest density of all structural metals make magnesium alloy sheets candidates to face the challenges of reducing vessel weight in the transportation industry and thus, green house gas emissions. For forming components from sheet metal, deep drawing is a well established and commonly applied process. Due to the limited formability of magnesium sheets at room temperature, deep drawing processes have to be conducted at elevated temperatures. In the present study, hot deep drawing experiments on an industrial scale hydraulic press were successfully conducted. Forming was done at moderately low temperatures from 150°C to 250°C. Sheets of the magnesium alloy AZ31B (Mg-3Al-1Zn-Mn) were drawn to symmetrical cups according to Swift. For AZ31, distinct basal type textures are formed during hot rolling. The influence of texture on earing is displayed. The microstructural evolution of the material is dominated by the formation of twins and dynamic recrystallisation. By optimising the process, a drawing ratio of 2.9 was achieved for AZ31 sheet, outperforming conventional materials at ambient temperature.
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Henseler, Thorsten, Shmuel Osovski, Madlen Ullmann, Rudolf Kawalla, and Ulrich Prahl. "GTN Model-Based Material Parameters of AZ31 Magnesium Sheet at Various Temperatures by Means of SEM In-Situ Testing." Crystals 10, no. 10 (2020): 856. http://dx.doi.org/10.3390/cryst10100856.

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Magnesium alloys are primarily associated with complex forming mechanisms, which yield ductility at high temperatures. In sheet metal forming, high triaxiality stress states that favor the ductile damage mechanisms of void formation and growth are known to malleable metals. The formulation of coupled damage models has so far failed, due to the incomplete experimental determination of damage parameters for magnesium AZ31 thin sheet. A quantitative investigation was conducted to determine the ductile damage behavior of twin-roll cast, hot rolled, and annealed AZ31 thin sheet. Results on the mechanisms of void nucleation-, coalescence- and growth-rate were established at temperatures ranging from room temperature to 350 °C. In-situ tensile tests were carried out in a scanning electron microscope with three different specimen types: Simple tension specimens, notched specimens for high triaxiality stress state testing, and shear specimens. Through a comparative analysis of local strains measured by digital image correlation and local void volume fractions determined through post-mortem analysis of specimen cross-sections, GTN (Gurson–Tvergaard–Needleman) model-based material parameters were determined by experiment, representing a novel departure in the magnesium research landscape. The procedure developed in this context should also be transferable to other metals in the form of thin sheets.
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Henseler, Thorsten, Madlen Ullmann, Rudolf Kawalla, and Franz Berge. "Influence of the Sheet Manufacturing Process on the Forming Limit Behaviour of Twin-Roll Cast, Rolled and Heat-Treated AZ31." Key Engineering Materials 746 (July 2017): 154–60. http://dx.doi.org/10.4028/www.scientific.net/kem.746.154.

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In the age of lightweight design, magnesium alloys play an increasing role in weight reduction of transport vehicles. The specific strength compared to aluminium alloys and steel grades is superior, giving the material great potential in lightweight application. The automobile and aeronautic industry use sheet metals with minimum thicknesses, making research in this field very important. Successful sheet metal forming depends on various process parameters and material characteristics. Thus, the influence of sheet thickness on the forming limit behaviour of twin-roll cast, rolled and heat-treated AZ31 was investigated. Nakajima tests were performed on a hydraulic sheet metal testing device at elevated temperatures with various sheet thicknesses from 0.6 mm to 2.0 mm. The results show an increase in formability with rising temperatures for all sheets. Furthermore, changes in formability among the sheet thicknesses were linked to their divergent microstructures, which result from the different sheet manufacturing parameters.
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KIM, INSOO, and SAIDMUROD AKRAMOV. "THE DEVELOPMENT OF THE MICROSTRUCTURE AND TEXTURE IN COLD ROLLED AZ31 MG ALLOY SHEETS." International Journal of Modern Physics B 22, no. 31n32 (2008): 5925–30. http://dx.doi.org/10.1142/s0217979208051388.

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Formability is very important parameter of magnesium alloy sheets and it would be related to the texture of sheet metals. In this study, magnesium alloy sheets with strong {0002} texture were cut along the angles of 0, 12.5, 25 and 37.5 degrees to rolling direction (RD). Prepared samples were rolled at room temperature condition. Cold rolled AZ31 magnesium alloy sheets along the angles of 0, 12.5, 25, 37.5 and 45 degrees to rolling direction were investigated microstructure and texture with optical microscopy and x-ray diffractometer, respectively.
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Huang, J., Y. Yuan, H. Liu, and J. Cao. "Mechanical Behavior Characterization of Magnesium Alloy Sheets at Warm Temperature." Journal of Mechanics 32, no. 4 (2015): 391–99. http://dx.doi.org/10.1017/jmech.2015.101.

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AbstractMagnesium (Mg) alloy sheet has received increasing attention in automotive, transportation, and aerospace industries. It is widely recognized that magnesium sheet has a poor formability at room temperature. While at elevated temperature, its formability can be dramatically improved. To better understand the warm forming properties of magnesium alloy sheet, an accurate description of the mechanical behavior at elevated temperature is required.In this paper, both uniaxial tensile tests and uniaxial compression tests were carried out at warm temperature for Mg AZ31B alloy sheets. The tensile tests were conducted under various strain rates and material orientations, while the compression tests only considered different material orientations. Based on the orthotropic yield criterion for hexagonal close packed (HCP) metals proposed by Cazacu et al., 2006, a viscoplasticity model has been developed to describe the initial yield anisotropy and asymmetry hardening behavior in tensile and compression of Mg sheet. This model was incorporated into ABAQUS through a user-defined material subroutine. The numerical results show a good agreement with experimental data in a large range of deformation.
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HARADA, YASUNORI, and YUJI KOBAYASHI. "COLD BUTT JOINING OF LIGHT METAL SHEET BY SHOT PEENING." International Journal of Modern Physics B 22, no. 31n32 (2008): 6100–6105. http://dx.doi.org/10.1142/s0217979208051649.

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Aluminum and magnesium materials are very attractive for light weight applications. However, their use is complicated by the fact that dissimilar metals are joined by fusion welding. In the present study, the cold butt joining of light metal sheet with dissimilar material sheet by shot peening was investigated. The shot peening process is widely used to improve the performance of engineering components. In this process the substrate undergoes a large plastic deformation near its surface when hit by many shots. The substrate material close to the surface flows during shot peening. When the dissimilar metal sheets with notched edges are connected without a level difference and then the connection is shot peened, the sheets can be joined by the plastic flow generated by the large plastic deformation during shot peening. In this experiment, an air-type shot peening machine was used. The influences of peening time and shot material on joinability were mainly examined. The joinability was evaluated by tensile test. The joint strength increased with the amount of plastic flow. It was found that the present method can be used to enhance the butt joining of the light metal sheets with the dissimilar material sheets.
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Jo, Sumi, Dietmar Letzig, and Sangbong Yi. "Effect of Al Content on Texture Evolution and Recrystallization Behavior of Non-Flammable Magnesium Sheet Alloys." Metals 11, no. 3 (2021): 468. http://dx.doi.org/10.3390/met11030468.

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The effect of Al content on the texture evolution and recrystallization behavior of the non-flammable Mg sheet alloys containing Ca and Y was investigated in this study. With a decrease in the Al content from 3 wt.% to 1 wt.%, the amounts of the other alloying elements dissolved in the matrix, especially Ca, are increased. The increase of the alloying elements in a solid solution brought out the retarded recrystallization and weakened texture with the basal poles tilted toward the sheet transverse direction. Extension twinning activity increased when Al content with decreasing, resulting in the texture broadening towards the sheet transverse direction in the as-rolled sheets. The textures of the AZXW1000 and AZXW2000 sheets weaken uniformly in all sample directions during annealing, while the AZXW3000 sheet shows less weakening of the rolling direction split component. The texture weakening of the alloys with lower Al contents is attributed to the retarded recrystallization caused by the larger amount of the dissolved Ca solutes. Based on the non-basal texture and relatively stable grain structure, the Mg alloy sheet containing a relatively small amount of Al is advantageous to improve the formability.
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Dissertations / Theses on the topic "Magnesium sheet metals"

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Dallmeier, Johannes. "Experimental analysis and numerical fatigue modeling for magnesium sheet metals." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2016. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-209124.

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The desire for energy and resource savings brings magnesium alloys as lightweight materials with high specific strength more and more into the focus. Most structural components are subjected to cyclic loading. In the course of computer aided product development, a numerical prediction of the fatigue life under these conditions must be provided. For this reason, the mechanical properties of the considered material must be examined in detail. Wrought magnesium semifinished products, e.g. magnesium sheet metals, typically reveal strong basal textures and thus, the mechanical behavior considerably differs from that of the well-established magnesium die castings. Magnesium sheet metals reveal a distinct difference in the tensile and compressive yield stress, leading to non-symmetric sigmoidal hysteresis loops within the elasto-plastic load range. These unusual hysteresis shapes are caused by cyclic twinning and detwinning. Furthermore, wrought magnesium alloys reveal pseudoelastic behavior, leading to nonlinear unloading curves. Another interesting effect is the formation of local twin bands during compressive loading. Nevertheless, only little information can be found on the numerical fatigue analysis of wrought magnesium alloys up to now. The aim of this thesis is the investigation of the mechanical properties of wrought magnesium alloys and the development of an appropriate fatigue model. For this purpose, twin roll cast AM50 as well as AZ31B sheet metals and extruded ME21 sheet metals were used. Mechanical tests were carried out to present a comprehensive overview of the quasi-static and cyclic material behavior. The microstructure was captured on sheet metals before and after loading to evaluate the correlation between the microstructure, the texture, and the mechanical properties. Stress- and strain-controlled loading ratios and strain-controlled experiments with variable amplitudes were performed. Tests were carried out along and transverse to the manufacturing direction to consider the influence of the anisotropy. Special focus was given to sigmoidal hysteresis loops and their influence on the fatigue life. A detailed numerical description of hysteresis loops is necessary for numerical fatigue analyses. For this, a one-dimensional phenomenological model was developed for elasto-plastic strain-controlled constant and variable amplitude loading. This model consists of a three-component equation, which considers elastic, plastic, and pseudoelastic strain components. Considering different magnesium alloys, good correlation is reached between numerically and experimentally determined hysteresis loops by means of different constant and variable amplitude load-time functions. For a numerical fatigue life analysis, an energy based fatigue parameter has been developed. It is denoted by “combined strain energy density per cycle” and consists of a summation of the plastic strain energy density per cycle and the 25 % weighted tensile elastic strain energy density per cycle. The weighting represents the material specific mean stress sensitivity. Applying the energy based fatigue parameter on modeled hysteresis loops, the fatigue life is predicted adequately for constant and variable amplitude loading including mean strain and mean stress effects. The combined strain energy density per cycle achieves significantly better results in comparison to conventional fatigue models such as the Smith-Watson-Topper model. The developed phenomenological model in combination with the combined strain energy density per cycle is able to carry out numerical fatigue life analyses on magnesium sheet metals.
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Weimer, William Eugene. "Corrosion of Magnesium, Aluminum, and Steel Automotive Sheet Metals Joined by Steel Self-Pierce Rivets." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1420818436.

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Gardner, Rebecca. "An Experimental Investigation of Friction Bit Joining in AZ31 Magnesium and Advanced High-Strength Automotive Sheet Steel." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2159.

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Friction Bit Joining (FBJ) is a recently developed spot joining technology capable of joining dissimilar metals. A consumable bit cuts through the upper layer of metal to be joined, then friction welds to the lower layer. The bit then snaps off, leaving a flange. This research focuses on FBJ using DP980 or DP590 steel as the lower layer, AZ31 magnesium alloy as the top layer, and 4140 or 4130 steel as the bit material. In order to determine optimal settings for the magnesium/steel joints, experimentation was performed using a purpose-built computer controlled welding machine, varying factors such as rotational speeds, plunge speed, cutting and welding depths, and dwell times. It was determined that, when using 1.6 mm thick coupons, maximum joint strengths would be obtained at a 2.03 mm cutting depth, 3.30 mm welding depth, and 2500 RPM welding speed. At these levels, the weld is stronger than the magnesium alloy, resulting in failure in the AZ31 rather than in the FBJ joint in lap shear testing.
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Dallmeier, Johannes [Verfasser], Klaus [Akademischer Betreuer] Eigenfeld, Klaus [Gutachter] Eigenfeld, Otto [Akademischer Betreuer] Huber, Otto [Gutachter] Huber, and Horst [Gutachter] Biermann. "Experimental analysis and numerical fatigue modeling for magnesium sheet metals / Johannes Dallmeier ; Gutachter: Klaus Eigenfeld, Otto Huber, Horst Biermann ; Klaus Eigenfeld, Otto Huber." Freiberg : Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2016. http://d-nb.info/1221068008/34.

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Dallmeier, Johannes [Verfasser], Klaus [Akademischer Betreuer] Eigenfeld, Klaus Gutachter] Eigenfeld, Otto [Akademischer Betreuer] Huber, Otto [Gutachter] Huber, and Horst [Gutachter] [Biermann. "Experimental analysis and numerical fatigue modeling for magnesium sheet metals / Johannes Dallmeier ; Gutachter: Klaus Eigenfeld, Otto Huber, Horst Biermann ; Klaus Eigenfeld, Otto Huber." Freiberg : Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2016. http://d-nb.info/1221068008/34.

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Kaya, Serhat. "Improving the formability limits of lightweight metal alloy sheet using advanced processes finite element modeling and experimental validation /." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1199293525.

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Chelladurai, Isaac. "Characterization of Phase Transformation and Twin Formation in Automotive Sheet Metal Alloys to Quantify and Understand Their Impact on Ductility." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/8628.

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The motivation to use lightweight materials in the construction of the automotive structure is the resultant increased fuel efficiency. However, these materials possess certain drawbacks that make it challenging to adopt them into current automobile manufacturing processes. In this dissertation the microstructural response observed in a magnesium alloy, AZ31, and an advanced high strength steel alloy, QP1180, to uniaxial deformation is analyzed and the results are presented. In AZ31 the required slip modes are not activated at room temperature leading to its low ductility at room temperature. The resulting activity of these twins in response to uniaxial tension is analyzed and its correlations with the microstructure features is reported. Additionally, a neighborhood viscoplastic self-consistent model is developed that will allow more accurate simulation of twin response to outside deformation. Furthermore, activity of slip modes that are usually observed at high temperatures (>200°C) are also observed at lower temperatures (<125°C) and they are compared to the relative twin activity at these temperatures. It is observed that larger grains, with high schmid factors, longer grain boundaries and have misorientation with its neighboring grain greater than 27° are more favorable for twin formation and transmission in the AZ31 microstructure in response to uniaxial tension. The nature of retained austenite (RA) transformation into martensite that gives QP1180 its enhanced ductility, is not clearly understood primarily because of challenges present in characterization of these metastable RA. Further, a 2 dimensional characterization method does not provide the complete information of the RA grain. These challenges are overcome by characterization of a 3 dimensional volume element using serial sectioning and EBSD followed by reconstruction using DREAM3D. The influence of 3d morphology and orientation direction on RA transformation is studied using as-is and uniaxially deformed samples. A novel shear affinity factor is introduced as a metric to describe the ease of RA transformation under uniaxial tension. The 3d nature of the information collected allows a new classification of disk shape in addition to globular and lamellar shapes for RA. It is found that RA that are low volume laths and have low shear affinity factor transform later compared to disk shaped RA’s. Through these guidelines the preparation of a microstructure that is conducive to RA transformation under uniaxial tension is possible.
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Theyssier, Marie-Christine. "Compression plane à chaud de cristaux d'aluminium et d'aluminium-magnésium : de la déformation à chaud à la recristallisation." Grenoble INPG, 1996. http://www.theses.fr/1996INPG4209.

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L'anisotropie des proprietes des toles d'aluminium est fonction des textures et microstructures developpees pendant les differentes etapes de la mise en forme. Pour simuler le laminage a chaud, nous avons deforme en compression plane biencastree a chaud (200ct00c, 0. 1. 5, 10#-#3s#-#10#-#1s#-#1) des cristaux d'al et d'al-1%mg (monocristaux, bicristaux et polycristaux). La texture de deformation a 400c de polycristaux d'al est de type l et celle obtenue pour al-1%mg est a dominante c/s. La deformation non imposee #d#l, #d#t des monocristaux d'orientation l d'al a 400c est inferieure a celle obtenue a 20c (facteur 1/3). Ceci est explique par l'activation d'un glissement non octaedrique 112 aux faibles valeurs du parametre de zener-hollomon z. Pour l'orientation c, c'est le glissement 100 qui est observe a t+00c. Le modele viscoplastique avec introduction de glissements non octaedriques simule correctement ces evolutions. A 400c, pour l'orientation l d'al-mg, le glissement est de type octaedrique et #d#l, #d#t est superieure au cas d'al pur. L'orientation cube al-mg se stabilise a chaud de meme que pour al mais pour de plus faibles valeurs de z. Les cellules de dislocations dans les grains d'al s'organisent en deux familles de blocs de cellules formant un damier sous-structural regulier. Les desorientations locales de bloc a bloc sont alternees le plus souvent autour de dt (pour l, quel que soit alors que pour c et s, peut atteindre 20 pour 1). Dans les grains d'al-mg, les tailles de blocs sont deux fois plus petites et les desorientations locales n'excedent pas 3. En recristallisation, le joint de grain presentant la vitesse de migration la plus grande apres deformation a 400c est le joint cube/s (avantage en mobilite et en terme de difference d'energies stockees dans les deux grains). Le joint s+/s- de type migre aussi par siem mais avec une cinetique plus lente. Une nouvelle orientation proche de cube apparait par recristallisation au joint s/l
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Verdier, Marc. "Étude de la restauration statique dans des alliages aluminium-magnésium." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0213.

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Dans ce travail nous avons etudie experimentalement l'evolution des microstructures et des contraintes internes au cours de la restauration des alliages al-mg. Nous avons etudie une large gamme de deformation par laminage a froid et une gamme de temperature de recuit de restauration qui nous ont permis de degager les grands mecanismes du processus ainsi que les evolutions microstructurales associees. Au niveau microstructural, nous avons employee des techniques traditionnelles telle que la microscopie electronique en transmission, ainsi que des mesures originales de l'evolution de l'energie stockee par calorimetrie, de la resistivite electrique, et de l'elargissement des pics de diffraction par rayons x. Ces dernieres techniques permettent de caracteriser au niveau mesoscopique les microstructures de dislocations. Parallelement, les proprietes mecaniques des alliages ont ete caracterisees avec des essais de traction (mesure de la limite d'elasticite et du durcissement d'ecrouissage), ainsi que par des tests de mise en forme (emboutissage et anisotropie de la limite d'elasticite des toles laminees). La modelisation des resultats experimentaux permet d'aborder des questions de fond de la plasticite: nous avons ainsi verifie la loi reliant la contrainte d'ecoulement a la racine carree de la densite de dislocations quelle que soit la microstructure. Pour decrire la restauration statique, nous avons mis en evidence l'importance du rayon de coupure des interactions elastiques qui constitue une grandeur mesoscopique pertinente pour decrire l'organisation des dislocations. Enfin une esquisse de l'approche du phenomene de restauration statique par le developpement d'une simulation numerique 3d des dislocations est donnee
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Hsieh, Hsiang-hsin, and 謝香欣. "A Study on Thread Forming for Magnesium Alloy Sheet Metal." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/58275474951537050675.

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碩士<br>國立高雄第一科技大學<br>機械與自動化工程所<br>97<br>Generally, the LCD panels to use a tapping of bore and the screw with bore to connect directly, but the material of structure must have enough thickness and strength, and have enough the number of screw and to avert the screw damaged when locked. The flange is the one of important process in sheet metal forming, and the main purpose of use as a connected and assembled after tapping. This study to achieve the forming simulation of flanging and tapping used the software of finite element method as DEFORM 3D. Using the DEFORM 3D to simulate with the parameter in the process, and to study the effect of process on each parameter. And design and manufacture the experimenting die to verify the accuracy of simulation. This article summarized the main parameters affect the process includes forming temperature, bore diameter of blank, flange forming, punch size. To M1, M2, M3 tap to explore the parameters. By the analysis result knew that the magnesium alloy is not good in 100℃ the forming causes the end product destruction. Forming temperature to 200℃ for the best working temperature. The holes flange forming highly also increases along with the forming punch diameter increases. When forming tapping billet have smaller diameter with better pitch.
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Book chapters on the topic "Magnesium sheet metals"

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Romanowski, Chris. "Magnesium Alloy Sheet for Transportation Applications." In The Minerals, Metals & Materials Series. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05789-3_1.

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Javaid, A., and F. Czerwinski. "Development of Manufacturing Processes for Magnesium Sheet." In The Minerals, Metals & Materials Series. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-05789-3_47.

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Kurz, G., T. Petersen, J. Bohlen, and D. Letzig. "Variation of Rare Earth Elements in the Magnesium Alloy ME21 for the Sheet Production." In The Minerals, Metals & Materials Series. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52392-7_51.

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Nemcko, Michael J., Armin Abedini, Clifford Butcher, Peidong Wu, and Michael J. Worswick. "Microstructural and Numerical Investigation on the Shear Response of a Rare-Earth Magnesium Alloy Sheet." In The Minerals, Metals & Materials Series. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52392-7_65.

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Bach, Friedrich Wilhelm, M. Rodman, and A. Rossberg. "High Quality Magnesium Sheets for Automotive Applications." In Sheet Metal 2005. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-972-5.665.

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Forcellese, A., Mohamad El Mehtedi, M. Simoncini, and S. Spigarelli. "Formability and Microstructure of AZ31 Magnesium Alloy Sheets." In Sheet Metal 2007. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-437-5.31.

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Neugebauer, Reimund, Stephan Dietrich, and Christian Kraus. "Dieless Clinching and Dieless Rivet-Clinching of Magnesium." In Sheet Metal 2007. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-437-5.693.

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Redecker, M., Karl Roll, and S. Häussinger. "Magnesium Sheet Metal Forming Considering its Specific Yield Behavior." In Sheet Metal 2005. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-972-5.771.

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Ambrogio, Gilusy, C. Bruni, Luigino Filice, and F. Gabrielli. "On the Formability of Magnesium Alloy Sheets in Warm Conditions." In Sheet Metal 2007. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-437-5.55.

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Hecht, J., S. Pinto, and Manfred Geiger. "Determination of Mechanical Properties for the Hydroforming of Magnesium Sheets at Elevated Temperature." In Sheet Metal 2005. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-972-5.779.

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Conference papers on the topic "Magnesium sheet metals"

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MINAMI, AKIHIRO, HIDETOSHI SAKAMOTO, and YASUO MARUMO. "DEEP DRAWING FORMABILITY OF THE MEASUREMENT OF MAGNESIUM SHEET METALS." In CMEM 2017. WIT Press, 2017. http://dx.doi.org/10.2495/cmem170011.

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Hsiang, Su-Hai, and Yi-Wei Lin. "Study on the Mechanical Properties of AZ31 Magnesium Alloy Products Under Hot Extrusion Process." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95241.

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Magnesium alloy parts have the merits of low specific gravity, high specific strength, electromagnetic wave-proof shelter, and recyclability; therefore, it has been extensively applied to 3C and car industries. However, the processing and forming of magnesium is quite difficult to control due to magnesium’s hexagonal close-packed (HCP) structure, making the slipping face of itself less than the FCC material. Currently, common processing methods of magnesium alloys are die casting, semi-solid forming, and plastic forming. In the employment of a fixed-speed method for extrusion, the extruded sheet had serious defects in the forms of cracks on the surface. Hence, in this research, AZ31 magnesium alloy sheet metals were processed by hot extrusion using a variable speed method. The formability of AZ31 sheets under converging dies was investigated. Three converging dies with semi die angle of 20°, 30°, and 40° were used. Experiments were conducted and analyzed utilizing the Taguchi method. L9 orthogonal array was used to design the experiments under extrusion ratio of 35.9. Four important process parameters considered in this research are the heating temperature of the billet (320°C, 340°C and 360°C), the temperature of the container (300°C, 350°C and 400°C), the initial speed of extrusion (2mm/sec, 3mm/sec and 4mm/sec), and the lubricants (boron nitride, molybdenum disulphide and graphite) applied in the extrusion. The influences of these parameters to the extrusion load and the resulting mechanical properties were investigated. Moreover, the microstructure of the extruded sheets was observed to provide better insight of the formability. As a result, the optimal combinations of the process parameters were determined for the maximum tensile strength.
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Niebauer, Jacklyn, Tyler Grimm, Derek Shaffer, Ian Sweeney, Ihab Ragai, and John T. Roth. "Effect of Applied Electricity on Springback During Bending and Flattening of 304/316 Stainless Steel, Titanium AMS-T-9046 and Magnesium AZ31B." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8810.

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One of the major issues with forming sheet metal is the tendency for parts to spring back towards their original shape when the applied loading is released. Springback is a form of geometric inaccuracy and is the result of residual stresses, which are created as the part deforms. As a result, forming intricate parts require specialized equipment and calculations to compensate for springback. Transportation industries that rely on forming high strength parts currently use complicated machinery that takes up time and energy to meet specifications. This research investigates the effects of electrically assisted manufacturing (EAM), a process in which electrical current is applied while a material is being manufactured, on springback. Bending and flattening testing will be performed on 4 metals: stainless steel 304 and 316, ASM-T-9046 titanium, and AZ31B magnesium. Additional testing will be performed on stainless steel, observing the effect of changing thicknesses, pulse durations, and current densities on springback. It was observed that an increase in pulse durations results in decreased springback for all the materials. Applying electricity to decrease springback was more effective for bending than flattening procedures in stainless steel and titanium, though it was equally effective for magnesium. For the additional testing on stainless steel, a change in thickness affected results when comparing it to current density, but not when observing similar applied current.
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Velukkudi Santhanam, Senthil Kumar, Ganesh Pasupathy, and Padmanabhan Kuppuswamy Anantha. "Determination of Superplastic Material Properties for Parent Material and Friction Stir Welded Joint of Al-Alloy AA6061-T6." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51368.

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Superplastic forming (SPF) takes the advantage of the metallurgical phenomenon of superplasticity (SP) to form complex and highly intricate bulk and sheet metal parts. SP refers to the extraordinary formability of certain metals and alloys, ceramics, composites (both metallic- and ceramic-based), dispersion strengthened materials, nanostructured materials and bulk metallic glasses, which allows them to suffer elongations of several hundred percent under the action of tensile forces. The superplastic forming characteristics of materials like aluminium, titanium and magnesium alloys have been clearly identified in order to produce complicated near-net shapes. These materials are used in the aeronautical manufacturing industry and automotive manufacturing industries due to the significant weight (by ∼ 30%) and cost (by ∼ 50%) saving that is possible. Some research work has proved superplastic forming of friction stir welded (FSW) joints also. The FSW joint efficiencies have been characterized by mechanical and metallurgical examination. Studies are also available on the behavior of FSW joints of similar and dissimilar metals. Information on the performance of friction stir welded joints during superplastic forming is rather limited, but it is important to achieve excellent properties in the friction stir welded joints also during superplastic forming. FSP (friction stir processing) – SPF (superplastic forming) is presently being promoted as a very viable near-net shape technology for making very large and complicated sheet metal products. To achieve this superplastic material parameters are much required in industry to develop new shapes. One has to understand the flow rule relationship and mechanics involved during sheet metal forming at high temperature to select the material and forming tool with selected process parameters. This paper deals with the determination of superplastic material properties of non-superplastic aluminum alloy AA6061-T6. The superplastic material properties like strain rate sensitivity index, flow stress and strain rate were determined for both the selected material and friction stir welded sheets at various tool rotation speeds. The superplastic free blow forming experiments were performed for various constant temperatures and pressure for the parent material. Similarly the superplastic free blow forming experiments were performed for the friction stir welded joint for various tool rotation speed at constant temperature. The methods were used to determine the material properties are straight line fit method and polynomial regression method. The superplastic forming height is significantly high in case of the FSW specimens at 2000 rpm, the initial forming rate is faster and the strain rate sensitivity index obtained is also higher when compared to the parent material properties. The strain rate sensitivity index obtained for friction stir welded specimen during superplastic forming was foundto have improved when compared to the parent material.
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Velukkudi Santhanam, Senthil Kumar, Jeffrin Michael Gnana Anbalagan, Shanmuga Sundaram Karibeeran, Dhanashekar Manickam, and Ramaiyan Sankar. "Multi Response Optimization of Friction Stir Processing Parameters on Cryo-Rolled AZ31B Alloys." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23198.

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Abstract Friction stir processing (FSP) method is a solid-state technique used for microstructural alteration and enhancing mechanical properties of sheet metals and as-cast materials. Aluminium, brass, copper, steel, tin, nickel, magnesium and titanium are the widely used materials in friction stir processing. Even though magnesium has low density compared to aluminium, only few reports are made on magnesium. Two stage of process was carried out on the experiment to obtain fine grain refinement and improved strength. First, Cryo-rolling processing on 6mm thickness AZ31B alloy at constant roller power, roller rotation speed, strength coefficient and strain exponent. AZ31B alloy is dipped in liquid nitrogen for certain period and rolled in it’s cold state. Number of passes into roller was same for 9 samples. Cryo-rolled AZ31B is used as sample for the second stage i.e., Friction stir processing. FSPed material produce refined grain structure, micro-structurally modified cast alloys by alloying specific elements, and improvement in material strength. Based on Process parameters the properties of the material alters. Friction stir processing was performed on cryo-rolled AZ31B magnesium alloy with various processing parameters. The effect of process parameters (tool pin geometry, tool rotational speed and tool traverse speed) on two responses namely ultimate tensile strength and micro-hardness values were measured. The tool used for Friction stir processing is H13 high carbon steel with hardness upto 60 HRC. Tool pin geometry used for Friction stir processing are square, cylinder and tapered. The processed materials are cut using wire cut EDM as per ASTM standards to measure the ultimate tensile strength and hardness. Universal tester and Vickers hardness tester were used to measure the tensile strength and hardness of the Friction stir processed sample. Most of the research has been published on cryo-rolled and FSP experiments separately. In this work, a combination of these two process is developed for improved tensile strength, hardness, and ultrafine grain refinement. A multi-response optimization was performed using grey relation analysis (GRA) to find out the optimum combination of the process parameters for maximum ultimate tensile strength hardness. Analysis of variance (ANOVA) and F-test were performed to determine the most significant parameters at a 95% confidence level. The corrosion test was made on Friction stir processed cryo-rolled AZ31B alloy for every process parameters. Salt spray test was done as per ASTM standard to find the corrosion rate. The corrosion rate for Friction stir processed cryo-rolled material is less (at optimal condition). The microstructure analysis was done on the samples using a Scanning Electron Microscopy. For clear view of grains the material is subjected to polishing and etching. The etchant used on the material is Picral + Acetic acid + Hydrogen peroxide. Fine grain size was obtained on the Friction Stir processed Cryo-rolled AZ31B magnesium alloy at optimal condition.
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Siegert, K., and S. Jäger. "Warm Forming of Magnesium Sheet Metal." In SAE 2004 World Congress & Exhibition. SAE International, 2004. http://dx.doi.org/10.4271/2004-01-1043.

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7

Abu-Farha, Fadi. "Spiral Friction Stir Processing (SFSP) for the Extrusion of Lightweight Alloy Tubes." In ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/msec2012-7358.

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While friction stir processing (FSP) has been used to refine the grain structure in sheet metals, this work explores the potentials of refining the grain structure of bulk material using the friction stirring phenomenon via the novel concept of spiral friction stir processing (SFSP). With this concept, the rotating stirring tool is plunged into the material, rather than being traversed across it as in FSP; this imposes severe plastic deformation on the material while pushing it radially outwards in complex spiral paths. By confining the material within a closed cylindrical die, the processed material is microstructurally-refined while forming a tube via a special form of SFSP called “friction stir back extrusion” (FSBE). The hypothesised concept was investigated using samples from the AA6063-T52 aluminium alloy and the AZ31B-F magnesium alloy. The preliminary results presented here demonstrate the viability of SFSP, and the special form of FSBE, in producing tubular samples that are structurally sound, with no signs of voids or internal channels. Optical microscopy was performed at key locations within selected tube specimens, and the obtained micrographs clearly show the presence of a stir zone with a fine grain structure; grain size measurements demonstrate the effectiveness of the processing technique in refining the microstructure of the starting material.
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Bapanapalli, Satish K., and Ba Nghiep Nguyen. "Forming Prediction of Magnesium Alloy Sheets Using a Continuum Damage Mechanics Multistep Inverse Approach." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66337.

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This paper applies a multistep inverse approach using a new method to generate the intermediate configurations to analyze the press forming of magnesium alloys. The developed approach considers a final configuration to be formed from a flat blank sheet. It accounts for a series of intermediate configurations that are estimated based on the initial and final configurations as well as tooling conditions using optimization techniques. These techniques minimize the sheet metal surface area subject to the constraints imposed on the punch and die. Due to the limited formability of magnesium alloys, it is important to realistically estimate the intermediate configurations so that a damage mechanics approach can be explored to predict damage accumulations that can cause rupture of the sheet during forming. Elastic-plastic constitutive laws are used with the modified Hill’s criterion and deformation theory of plasticity to describe the behavior of AZ31 magnesium alloys. Damage is captured by a damage variable that governs the equivalent stress. A damage-plasticity coupled approach is employed for the integration of the constitutive equations. The computed strain increment from two consecutive intermediate configurations is used to predict the resulting damage accumulations during forming. The continuum damage mechanics multistep inverse approach is applied to predict forming of AZ31 magnesium alloy sheets.
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Liu, Z. G., P. Lasne, and E. Massoni. "Formability study of magnesium alloy AZ31B." In THE 8TH INTERNATIONAL CONFERENCE AND WORKSHOP ON NUMERICAL SIMULATION OF 3D SHEET METAL FORMING PROCESSES (NUMISHEET 2011). AIP, 2011. http://dx.doi.org/10.1063/1.3623605.

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Matsui, Yamato, Masahiko Otsuka, and Shigeru Itoh. "Explosive Welding of Metal Sheets." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71354.

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In this work explosive line and spot welding were used for the bonding of light-weight metal sheets. Materials involved are aluminum alloys 5052-O, 6061-T6, and 7075-T6, a magnesium alloy AZ31B-O and a commercially pure titanium (TP270C). Plates of similar and dissimilar metal combinations are explosion welded over a small overlapping area. The strength of the welds was measured using shear strength tests and the metal interface was analyzed using optical microscopy. The shear strength of the welds have been tested and appeared to high shearing strength. Explosive line and spot welding show a high strength to explosive mass ratio, making it a good candidate to be scaled up and used in commercial applications.
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