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Artículos de revistas sobre el tema "As-cast alloy microstructure"

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Publicado: 4 de junio de 2021
Última modificación: 9 de febrero de 2022

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1

Shen, Jia, Ming Bo Yang, Fu Sheng Pan, and Ren Ju Cheng. "Comparison of As-Cast Microstructures and Mechanical Properties for Mg-Ce-Mn-Sc and Mg-Ce-Mn-Zn Magnesium Alloys." Materials Science Forum 610-613 (January 2009): 746–49. http://dx.doi.org/10.4028/www.scientific.net/msf.610-613.746.

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The as-cast microstructures and mechanical properties of Mg-3Ce-1.2Mn-0.9Sc and Mg-3Ce-1.2Mn-1Zn magnesium alloys were investigated and compared. The results indicate that the as-cast microstructure of Mg-3Ce-1.2Mn-0.9Sc alloy was mainly composed of -Mg, Mg12Ce and Mn2Sc phases, and that the as-cast microstructure of Mg-3Ce-1.2Mn-1Zn alloy was mainly composed of -Mg, Mg12Ce and MgZn phases. In addition, the as-cast tensile and creep properties of Mg-3Ce-1.2Mn-0.9Sc alloy were higher than that of the Mg-3Ce-1.2Mn-1Zn alloy. The difference of the two alloys in as-cast tensile and creep propert
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2

Guggari ,, Geetanjali S., Veena Badiger, and Dr Shivakumar S. "Microstructure and Wear Behavior Of as Cast Al-25mg2si-2cu-2ni Alloy." International Journal of Engineering Research 4, no. 9 (2015): 470–74. http://dx.doi.org/10.17950/ijer/v4s9/901.

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3

Thier, M., M. Hühner, E. Kobus, D. Drescher, and C. Bourauel. "Microstructure of As-cast NiTi alloy." Materials Characterization 27, no. 3 (1991): 133–40. http://dx.doi.org/10.1016/1044-5803(91)90056-a.

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4

Krishnan, Arjun Bala, Kavin Selvaraj, Akhil Madhusoodhanan Geethakumari, and Ravi Manickam. "Effect of Heat Treatment on the Microstructure of Gravity Cast and Squeeze Cast Al-Si-Mg Alloy." Materials Science Forum 830-831 (September 2015): 164–67. http://dx.doi.org/10.4028/www.scientific.net/msf.830-831.164.

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The present work deals with the effect of solutionising heat treatment on the features of Al-7Si-0.3Mg (A356) alloy in terms of microstructural modifications and hardness. The microstructure of sand cast and gravity cast alloys are coarse which results in lower strength compared to the alloys cast using modern casting techniques such as squeeze casting which is used for the fabrication of near-net-shaped castings. The influence of enhanced cooling rate on the hardness and microstructure of the squeeze casting technique has been exploited in the present study. In order to optimise the heat trea
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5

Li, Jia, Wang, Li, Meng, and He. "Effect of Fe Addition on Microstructure and Mechanical Properties of As-cast Ti49Ni51 Alloy." Materials 12, no. 19 (2019): 3114. http://dx.doi.org/10.3390/ma12193114.

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Effect of Fe addition on microstructure and mechanical properties of as-cast Ti49Ni51 alloy were investigated. The experimental results shows the microstructures of Ti48.5Ni51Fe0.5 and Ti48Ni51Fe1 alloys are mainly composed of TiNi matrix phase (body-centered cubic, BCC), Ti3Ni4 and Ni2.67Ti1.33 phases; the microstructure of Ti47Ni51Fe2 alloy is mainly composed of BCC TiNi, Ti3Ni4, Ni2.67Ti1.33, and Ni3Ti phases; the microstructure of the Ti45Ni51Fe4 alloy is mainly composed of TiNi, Ti3Ni4 and Ni3Ti phases. The Ni3Ti nanocrystalline precipitates at the adjacent position of Ni2.67Ti1.33 phase.
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6

Pataric, Aleksandra, Marija Mihailovic, Branislav Markovic, Miroslav Sokic, Andreja Radovanovic, and Branka Jordovic. "Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process." Chemical Industry 75, no. 1 (2021): 31–37. http://dx.doi.org/10.2298/hemind201214006p.

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Microstructure assessment is crucial for the design and production of high-quality alloys such as cast aluminum alloy ingots. Along with the effect of a more homogeneous microstructure to result in much better mechanical properties, better as-cast alloy quality indicates a higher efficiency of the aluminum alloys production process. During the aluminum alloy solidification process many microstructural defects can occur, which deteriorate the mechanical properties and hence decrease the usability of such an ingot. Application of the electromagnetic field during the vertical continuous casting p
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7

Han, Ping, and Jian Ting Guo. "Effect of Process on Microstructure and Elevated Temperature Mechanical Behavior of Multi-Phase NiAl-Fe(Nb) Alloy." Advanced Materials Research 299-300 (July 2011): 163–66. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.163.

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The microstructure and elevated temperature mechanical behavior of as-cast, HIPed and directionally solidified NiAl-Fe(Nb) Alloys have been investigated. The results show that the microstructure of as-cast NiAl-Fe(Nb) alloy consists of dendritic regions (b) and interdendritic regions (g/g¢) with non-continuous NbNiAl(Laves) phase segregating at the interfaces of b and g/g¢ phases. The HIP processing does not alter the microstructure of as-cast alloy. The longitudinal dendritic microstructure of the DS NiAl-Fe(Nb) alloy is regular. Room temperature elongations of as-cast and HIPed NiAl-Fe(Nb) a
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8

Liu, Rui Qing, An Yun Li, Li Jun Peng, and Guang Bin Qiu. "Microstructure and Properties of As-Cast Cu-20Ni-5Sn Alloy." Applied Mechanics and Materials 341-342 (July 2013): 18–22. http://dx.doi.org/10.4028/www.scientific.net/amm.341-342.18.

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Cu-20Ni-5Sn alloy has not only high content of Ni melted point 1453°C, but also low melting point elements of Sn melted at 231.9°C, therefore, the grain structure of alloy as-cast is in perfect dendrite that lends to form segregation and inverse segregation of Sn, so that the hot rolling (cogging) processing is restricted. The influence of casting methods, cooling rate and heat treatment on the microstructures and properties of as-cast Cu-20Ni-5Sn alloy were investigated. The results show that, compared to the ingot casted in iron mold and graphite mold, the microstructure of Cu-20Ni-5Sn ingot
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9

Cheng, Ren Ju, Ai Tao Tang, Ming Bo Yang, and Fu Sheng Pan. "Effects of Al-Sr Master Alloys on the As-Cast Microstructure of the AZ31 Magnesium Alloys." Materials Science Forum 546-549 (May 2007): 183–86. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.183.

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The influence of Al-10.5%Sr master alloy, which is much cheaper than Mg-Sr master alloys, on the as-cast microstructure of the AZ31 alloy was investigated. The research results revealed that the Al-10.5%Sr master alloy produced obvious modification of the as-cast microstructure of the AZ31 alloy, and the modification efficiency increased with the holding time from 0min to 60min and the amount of Sr from 0.01% to 0.1%. Moreover, the results also showed that the Al-10.5%Sr master alloys of different states had different modification efficiency on the as-cast microstructure of the AZ31 alloy. The
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10

Park, Sung S., Geun Tae Bae, Jung G. Lee, Dae H. Kang, Kwang Seon Shin, and Nack J. Kim. "Microstructure and Mechanical Properties of Twin-Roll Strip Cast Mg Alloys." Materials Science Forum 539-543 (March 2007): 119–26. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.119.

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Development of wrought Mg alloys, particularly in sheet form, is essential to support the growing interest for lightweight components in the automotive industry. However, development of Mg alloy sheets has been quite slow due to the complexity of sheet production originated from limited deformability of Mg. In this respect, twin-roll strip casting, a one-step processing of flat rolled products, can be an alternative for the production of Mg alloy sheets. In this study, AZ31 and experimental ZM series alloys are twin-roll strip cast into 2 mm thick sheets. The microstructure of the as-cast AZ31
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11

Chen, Yu Yong, Zhi Guang Liu, L. Chai, Fan Tao Kong, and Hywel A. Davies. "Microstructure of Rapidly Solidified Ti-46Al-2Cr-2Nb-xY Alloys." Advanced Materials Research 29-30 (November 2007): 103–6. http://dx.doi.org/10.4028/www.scientific.net/amr.29-30.103.

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In this paper, a rapid solidification (RS) method was employed to produce yttrium-containing TiAl based alloy ribbons. The microstructure evolution was investigated in terms of yttrium addition and RS parameters. For comparison, the conventionally cast counterpart alloys were studied as well. It was found that the microstructure of as cast alloys is sensitive to the Y content. The alloys with addition of 0 to 1.0at.% Y were of lamellar microstructures, but the alloy samples with 1.5 and 2.0at.% Y additioin were of strip-like microstructure. The yttrium-free alloy exhibited full γ phase, while
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12

Suksamran, Amnart, Nawarat Worauaychai, Nattaya Tosangthum, et al. "Effect of Aluminum Addition on AlxCoFeMnNiZn Multi-Component Production." Key Engineering Materials 751 (August 2017): 53–59. http://dx.doi.org/10.4028/www.scientific.net/kem.751.53.

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Five multi-component alloy (MCA) formulations of CoFeMnNiZn (MCA01), Al0.5CoFeMnNiZn (MCA02), Al1.0CoFeMnNiZn (MCA03), Co5Fe5Mn30Ni20Zn40 (MCA04) and Al8.4Co4.6Fe4.6Mn27Ni18.4Zn37 (MCA05) were prepared by mechanical alloying and melting process (MAM). Five-component alloys of MCA01-MCA05 were designed using empirical formulae for high entropy alloys. Phase formation and microstructure were evaluated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that MCA01 was partially melted by MAM process. However, MCA02-MCA05 could be melted and cast by MAM process. T
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13

Park, Sung S., Young Min Kim, Dae H. Kang, and Nack J. Kim. "Development of Mg Alloy Sheets via Strip Casting." Materials Science Forum 475-479 (January 2005): 457–62. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.457.

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AZ31 and experimental ZMA611 alloys were strip cast into 2 mm thick strips. The as-cast AZ31 alloy strip consists of columnar dendrites. On the other hand, as-cast ZMA611 alloy strip shows equiaxed dendritic structure through the thickness of strip. These alloys were subjected to various thermomechanical treatments and their tensile properties were evaluated. Strip cast AZ31 alloy in H24 condition has equivalent yield and tensile strengths with similar ductility compared to commercial ingot cast AZ31-H24 alloy, indicating that strip casting is a viable process for the fabrication of Mg alloy s
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14

Matvija, Miloš, Martin Fujda, Ondrej Milkovič, Marek Vojtko, Róbert Kočiško, and Miroslav Glogovský. "Microstructure Changes and Improvement in the Mechanical Properties of As-Cast AlSi7MgCu0.5 Alloy Induced by the Heat Treatment and ECAP Technique at Room Temperature." Advances in Materials Science and Engineering 2018 (June 3, 2018): 1–11. http://dx.doi.org/10.1155/2018/5697986.

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The changes in the microstructure and improvement in the mechanical properties of as-cast AlSi7MgCu0.5 alloy induced by the heat treatment and technique of equal channel angular pressing (ECAP) were investigated. The heat treatment of as-cast alloy performed before the ECAP technique was required to increase the plasticity of the alloy. Therefore, the samples of analysed alloys were solution annealed at optimized temperature of 823 K for 4 hours to dissolve the particles of intermetallicπ(Al8FeMg3Si6) phase and to spheroidize the Si particles. Subsequently, water quenching and artificial agein
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15

Park, Sung S., Dae H. Kang, Geun Tae Bae, and Nack J. Kim. "Development of Strip Casting Process for Fabrication of Wrought Mg Alloys." Materials Science Forum 488-489 (July 2005): 431–34. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.431.

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AZ31 and experimental ZMA611 alloys were strip cast into 2 mm thick strips. The as-cast AZ31 alloy strip consists of columnar dendrites. On the other hand, as-cast ZMA611 alloy strip shows equiaxed dendritic structure through the thickness of strip. Strip cast AZ31 alloy in H24 condition has equivalent yield and tensile strengths with similar ductility compared to commercial ingot cast AZ31-H24 alloy, indicating that strip casting is a viable process for the fabrication of Mg alloy strips. The ZMA611 alloy has a large volume fraction of fine dispersoid particles in the microstructure, resultin
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16

Abdel-Aziz, Ahmed Ibrahim, Ahmed S. A. Abou Taleb, Z. M. El-Baradie, and Ahmed Ismail Zaky Farahat. "Effect of Friction Stir Processing on the Microstructure and Mechanical Properties of A384 Aluminum Alloy." Key Engineering Materials 786 (October 2018): 23–36. http://dx.doi.org/10.4028/www.scientific.net/kem.786.23.

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Friction stir processing (FSP) is a solid-state technique for microstructural modification. The aim of this work is to evaluate the effect of input process parameters of friction stir processing (tool rotational speed rpm, travel speed mm/min) on microstructure and mechanical properties of A384 aluminum alloy. A384 aluminum alloy was cast using conventional stir casting process. The obtained alloy was subjected to friction stir process using different input parameters (rpm, mm/min) with double pass. Water was used as cooling medium during process. The microstructures of investigated alloys wer
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17

Li, Xiao Mei, Jing Jing Yu, and Jin Yu. "Simulation of Microstructure and Properties of As-Cast Al Alloys." Advanced Materials Research 772 (September 2013): 72–76. http://dx.doi.org/10.4028/www.scientific.net/amr.772.72.

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Two as-cast Al-Zn-Mg-Cu alloys with different alloying element contents have been studied in terms of precipitation phases and properties. The modeling results show that different composition of the alloy has a significant effect on the microstructure and the tensile properties, while the electrical conductivity is not affected by the variation of the alloy composition.
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18

Dybowski, Bartłomiej, Bogusława Adamczyk-Cieślak, Kinga Rodak, Iwona Bednarczyk, Andrzej Kiełbus, and Jaroslaw Mizera. "The Microstructure of AlSi7Mg Alloy in as Cast Condition." Solid State Phenomena 229 (April 2015): 3–10. http://dx.doi.org/10.4028/www.scientific.net/ssp.229.3.

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The complex microstructure of as-cast AlSi7Mg alloy has been investigated. Microstructure observations were done using light microscopy, scanning electron microscopy and transmission electron microscopy. Chemical composition of the microstructure constituents was investigated by means of energy dispersive spectrometry, conducted both during SEM and STEM investigations. Selected area diffraction was used to identify the phases in the alloy. Microstructure of the alloy in the as-cast condition consists of Al-Si eutectic and intermetallic phases in the interdendritic regions. These are: Mg2Si, α-
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19

Cheng, Chai Wei, Jian Jia Huang, Shyong Lee, Jian Yih Wang, and Chih Te Chiang. "Microstructure and Mechanical Behaviors of the New LAZ1151 Mg-Li Alloy." Advanced Materials Research 239-242 (May 2011): 1326–30. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.1326.

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This research studies a brand new Magnesium Lithium Alloy, LAZ1151, with trace Sc additions. The mechanical properties and microstructures of the as-cast and alloys after three and six month aging were observed and analyzed. Microstructure and XRD confirms the existence of α phase precipitates (Mg rich) in both as-cast and aging specimens of the alloy. Grain growth was observed in the alloy after room temperature aging. The tensile strength of the as-cast LAZ1151 is 147 MPa; the value is decreased to 135 MPa after six month aging, showing typical room temperature softening. Strengthening via t
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20

Abdelgnei, M. A., M. Z. Omar, M. J. Ghazali, and M. N. Mohammed. "Investigation of the Optimal Heat Treatment of As-Cast Al-5.7Si-2Cu-0.3Mg Aluminium Alloys." Advances in Science and Technology 105 (April 2021): 48–58. http://dx.doi.org/10.4028/www.scientific.net/ast.105.48.

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The aim of this work is to investigate the optimum heat treatment for Al-5.7Si-2Cu-0.3Mg aluminium alloys and study its effect on microstructure, phase transformations, and hardness. The test specimens were taken from the as-received alloy. Solution treatment was performed at 485°C and 500°C under various solution treatment times for 4, 8, 10, and 12h, and the samples were then hot water quenched at 60°C, followed by aged hardening at 150°C, 170°C and 190°C for 2,6,10, and 14h, and subsequently air-cooled. The hardness of the Al-5.7%Si-2Cu%-0.3%Mg alloys were determined using a Rockwell hardne
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21

Kong, Fan Tao, and Yu Yong Chen. "The Effect of Heat Treatment on the Microstructure of Ti-45Al-5Nb-0.3Y Alloy." Materials Science Forum 614 (March 2009): 55–59. http://dx.doi.org/10.4028/www.scientific.net/msf.614.55.

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Effects of heat treatment on the microstructure of as-cast and as-forged Ti-45Al-5Nb-0.3Y alloy are discussed. The as-cast Ti-45Al-5Nb-0.3Y alloy exhibits a microstructure consisting of fine equiaxed grains which average size is almost 100μm. Phase transformation of as-cast Ti-45Al-5Nb-0.3Y alloy greatly depends upon cooling rate. During furnace cooling, the alloy transform to fully lamellar microstructure. During air cooling, massive transformation predominates. During oil cooling, extremely fine fully lamellar microstructure is formed. During water cooling, ordering α2 phases are primary. Th
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22

Yan, Xin Qi, Yong Chen, Sheng Xin Liu, Wei Min Long, Jun Lan Huang, and Liang Ying Zhang. "Effect of Homogenization Treatment on Microstructure and Properties of ZnAl15 Alloy." Advanced Materials Research 875-877 (February 2014): 1250–54. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.1250.

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The microstructure, microhardness and corrosion resistance of as-cast and as-annealed ZnAl15 alloys were investigated by OM, SEM, EDX and DSC techniques. It was found that microstructure of as-cast ZnAl15 alloy was primary dendrites and eutectic matrix. But Primary discontinuous precipitation of αs and βs phase occurred at room temperature. During homogenization treatment, discontinuous precipitation of αs and βs phase occurred completely and accompanied with emitting heat. The final microstructures of decomposed αs and βs phase in primary dendrites were fine and coarse lamellar structures res
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23

Shao, Yue Wen, Yi Liu, Jin Feng Leng, Kun Zhu, Ze Mei Liu, and Chen Xue Li. "Microstructure of As-Cast 7085 Aluminum Alloy by Homogenization." Materials Science Forum 898 (June 2017): 265–71. http://dx.doi.org/10.4028/www.scientific.net/msf.898.265.

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7085 aluminum alloy has been widely used in aviation and aerospace because of high fracture toughness, high strength, slow quench sensitivity and low density. In the as-cast microstructure, it is not avoidable for massive un-dissolved secondary phases and dendritic segregation. The microstructure of as-cast high strength 7085 aluminum alloy after two-stage homogenization was studied by optical microscopy (OM), X-ray diffractometer (XRD), scanning election microscopy (SEM), energy dispersive spectrometer (EDS) and differential scanning calorimeter (DSC). It was found that the severe dendritic s
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24

Zhang, Qing, Quan An Li, Jun Chen, and Xing Yuan Zhang. "Grain Refinement of Y in As-Cast Mg-Y Alloys." Advanced Materials Research 750-752 (August 2013): 603–6. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.603.

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The grain refinement of 2-8 wt.% Y addition in as-cast Mg-Y binary alloys has been investigated. The results show that the microstructure of as-cast Mg-Y alloys consists of α-Mg matrix and Mg24Y5phase. Mg24Y5can become the effective nucleation core of α-Mg, and refine the grain size of the alloys. The ultimate tensile strength of as-cast Mg-5Y alloy is 180MPa at room temperature. Mg-5Y alloy can be a basis for developing light structural materials.
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25

Kang, Dae H., Min S. Yoo, Sung S. Park, and Nack J. Kim. "Development of Creep Resistant Mg Alloys." Materials Science Forum 475-479 (January 2005): 521–24. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.521.

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A study has been made on the tensile and creep properties of squeeze and die cast Mg alloys, with emphasis on the effect of second phase particles. Two different microstructures were compared; the microstructure with thermally unstable particles along grain boundaries (AZ91 alloy) and the microstructure with thermally stable particles along grain boundaries as well as within matrix (MX alloy). The experimental MX alloy has equivalent room temperature tensile strength to AZ91 alloy with higher ductility. Moreover, elevated temperature tensile properties and creep resistance of MX alloy are high
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26

Xu, Cong, Cheng Yuan Wang, Hai Jun Yang, Zhi Guo Liu, Hiroshi Yamagata, and Chao Li Ma. "Solidification Behavior and Mechanical Properties of Al-Si-Mg Alloy with Ti Addition." Materials Science Forum 850 (March 2016): 594–602. http://dx.doi.org/10.4028/www.scientific.net/msf.850.594.

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The solidification behavior, microstructural evolution and mechanical properties of Al-Si-Mg foundry alloy with different Ti additions were investigated in the present study. The solidification behavior of those A357 alloys was analyzed through thermal analysis. The microstructures were examined by optical microscopy (OM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The results showed that the addition of Ti could refine grains of A357 as-cast alloy due to a good restriction on the grain growth, but Ti could not refine secondary dendrite arm spacing (SDAS
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27

Salomonsson, Kent, and Anders E. W. Jarfors. "Three-Dimensional Microstructural Characterization of Cast Iron Alloys for Numerical Analyses." Materials Science Forum 925 (June 2018): 427–35. http://dx.doi.org/10.4028/www.scientific.net/msf.925.427.

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In this paper, we aim at characterizing three different cast iron alloys and their microstructural features, namely lamellar, compacted and nodular graphite iron. The characterization of microscopic features is essential for the development of methods to optimize the behavior of cast iron alloys; e.g. maximize thermal dissipation and/or maximize ductility while maintaining strength. The variation of these properties is commonly analyzed by metallography on two-dimensional representations of the alloy. However, more precise estimates of the morphologies and material characteristics is obtained
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28

Nguyen, Van Thuong, Zuhailawati Hussain, Abu Seman Anasyida, Tr D. Huy, and Indra Putra Almanar. "Influence of Semi-Solid Casting and Equal Channel Pressing on Microstructure of a Hypoeutectic Al-Si Alloy." Materials Science Forum 819 (June 2015): 9–14. http://dx.doi.org/10.4028/www.scientific.net/msf.819.9.

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The aim of this work was to develop understanding of microstructural evolution of the alloy casted in semi-solid condition using a cooling slope and conventional casting followed by ECAP in a 120odie. Feed materials were prepared by cooling slope casting and conventional casting for ECAP process. The microstructures and Vickers hardness of the worked materials extruded by two routes (A and BC) were evaluated. The primary α-Al phase tends to be elongated after processing by route A. However, its morphology was similar in nature to the microstructure of the as-cast sample after processing by rou
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29

Sun, Huan Ying, Jing Xia Cao, Bao Wang, Xu Huang, and Chun Xiao Cao. "Thermal Flow Deformation Behavior and Mechanism of As-Cast and As-Extruded Burn Resistant Titanium Alloy." Advanced Materials Research 535-537 (June 2012): 977–82. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.977.

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Hot compressive deformation tests of burn resistant titanium alloy (Ti-35V-15Cr-Si-C) with initially as-cast and as-extruded microstructure were performed at deformation temperature between 900°C to 1200°C for as-cast and 900°C to 1150°C for as-extruded alloy, and strain rates between 10-3s-1to 1s-1. The compressive true stress vs. true strain curves were measured, the deformation activation energy was calculated and the microstructures after deformation were studied. The results show that dynamic reversion is the primary soften mechanism of the burn resistant titanium alloy during hot deforma
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30

Wang, Xu Dong, Zheng Lu, Zhao Hui Feng, Xian Feng Zhang, Zhi Feng Ma, and Gang Sun. "Microstructure and Tensile Properties of As-Cast Mg-5Sn-4Cu Alloy." Materials Science Forum 788 (April 2014): 78–81. http://dx.doi.org/10.4028/www.scientific.net/msf.788.78.

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The microstructure and tensile properties of permanent-mould cast Mg-5wt%Sn-4wt%Cu alloy was investigated by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and tensile test in this paper. The result indicated that the microstructures of the as-cast samples consist of 30-40 μm size primary solidification phase, primary dendrite Mg2(Cu,Sn) which is a network-like interdendritic eutectic intermetallic compounds along grain boundaries and particle like Mg2(Sn,Cu) phases. The Mg-5Sn-4Cu alloy exhibit maximum ultimate tensile strength and yield strength, and the values ar
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31

Longauerová, Margita, Miroslav Glogovský, and Marek Vojtko. "Effect of Al Content and Heat Treatment on Microstructure of ZnAlCu Alloys." Key Engineering Materials 647 (May 2015): 85–92. http://dx.doi.org/10.4028/www.scientific.net/kem.647.85.

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The work analyses microstructures of ZnAl4Cu1, ZnAl27Cu2 and ZnAl40Cu2Si2 alloys in cast condition and after heat treatment in relation to microhardness HV0.2 and purity of the alloys. As shown the microstructure of ZnAl4Cu1 alloy contained η phase and eutectoid, which consisted phases α + η. ZnAl27Cu2 alloy contained α phase, eutectoid and ε phase, and ZnAl40Cu2Si2 alloy had a similar composition, but moreover contained Si particles. Microhardness in the molten state in ZnAl4Cu1 alloy was HV0.2 = 94, in ZnAl27Cu2 alloy it was HV0.2 = 117, and in ZnAl40Cu2Si2 alloy it was HV0.2 = 142.
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32

Chalupová, Mária, Eva Tillová, and Mária Farkašová. "Microstructure Analysis of AlSi10MgMn Aluminium Cast Alloy." Materials Science Forum 782 (April 2014): 365–68. http://dx.doi.org/10.4028/www.scientific.net/msf.782.365.

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The present study was performed on primary AlSi10MgMn cast alloy to analyze the morphology and composition of complex microstructure of the intermetallic phases. AlSi10MgMn cast alloy is a typical casting alloy used for parts with thin walls and complex geometry. It offers good strength, hardness and dynamic properties and is therefore also used for parts subject to high loading. In this study, several methods were used such as: optical light microscopy (LM) and scanning (SEM) electron microscopy in combination with EDX analysis using standard etched or deep etched sample to identify intermeta
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33

Geng, Jiwei, Xinying Teng, Guorong Zhou, and Zhenwei Zhao. "Solidification and microstructure of as-cast Mg65Zn32Y3 quasicrystal alloy." Physica B: Condensed Matter 420 (July 2013): 64–69. http://dx.doi.org/10.1016/j.physb.2013.03.035.

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34

Liu, Fei, Haidong Zhao, Runsheng Yang, and Fengzhen Sun. "Microstructure and Mechanical Properties of High Vacuum Die-Cast AlSiMgMn Alloys at as-Cast and T6-Treated Conditions." Materials 12, no. 13 (2019): 2065. http://dx.doi.org/10.3390/ma12132065.

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Al–Si–Mg based alloys can provide high strength and ductility to satisfy the increasing demands of thin wall castings for automotive applications. This study has investigated the effects of T6 heat-treatment on the microstructures, the local mechanical properties of alloy phases and the fracture behavior of high vacuum die-cast AlSiMgMn alloys using in-situ scanning electron microscopy (SEM) in combination with nano-indentation testing. The microstructures of the alloys at as-cast and T6 treated conditions were compared and analyzed. It is found that the T6 heat treatment plays different roles
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35

Mantrala, Mallik Kedar, Srinivasa Rao Ch, and Kesava Rao V. V. S. "Microstructure and Tribological Properties of Weld Deposited Co-Cr-Mo Alloy." Journal for Manufacturing Science and Production 15, no. 2 (2015): 239–41. http://dx.doi.org/10.1515/jmsp-2014-0030.

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AbstractCo-Cr-Mo alloy samples were deposited using arc welding process with optimum parameters of deposition. The samples were tested for their hardness, XRF, wear resistance and microstructures. The results were compared with the laser deposited samples and cast samples from literature. The experimental results revealed that the hardness of the weld deposits was inferior to as-cast samples as well as the laser deposited samples. But the wear resistance of the weld deposited samples was compatible with laser deposited samples. Metal to metal contact Pin on Disc wear resistance test was conduc
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36

Wang, Yan Qing, Zhao Gang Liu, Ben Shuang Sun, and Dong Xin Wang. "Study on Microstructure of Several Nb-Ti-Cr-Al as-Cast Alloys." Advanced Materials Research 581-582 (October 2012): 504–9. http://dx.doi.org/10.4028/www.scientific.net/amr.581-582.504.

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Due to low-density, higher elevated temperature strength and good oxidation resistance; the Nb-Ti-Cr-Al alloy was estimated to become a new kind of material used at elevated temperature of next generation. Therefore, it was widely studied by western developed country, but there are still many questions unsolved in this area. In this article, several kinds of Nb-Ti-Cr-Al alloys of different compositions were prepared by arc melting, and analyzed by metallographic method, XRD, SEM and EDS. The results indicated, in Nb-40Ti-15Al alloy, the solidified Structure was typical small equiaxed grains, c
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37

Hou, Le Gan, Rui Zhi Wu, Ji Qing Li, et al. "Effects of Hot Extrusion on Microstructure, Texture and Mechanical Properties of Mg-5Li-3Al-2Zn Alloy." Materials Science Forum 773-774 (November 2013): 218–25. http://dx.doi.org/10.4028/www.scientific.net/msf.773-774.218.

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This work mainly studied the effects of hot extrusion on microstructure, texture and mechanical properties of Mg-5Li-3Al-2Zn alloy. The results show that the microstructures of as-cast and as-extruded alloys both consist of α-Mg matrix and lamellar eutectic structure (α-Mg and AlLi phases). During the hot extrusion, the large eutectic structure of as-cast alloy was crushed into small eutectic structure and the grains were effectively refined. A {0002} basal texture was formed after hot extrusion. The as-extruded alloy exhibits remarkably improved tensile properties, which is mainly attributed
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38

Wang, Yanfeng, Qian Liu, Zheng Yang, Changming Qiu, and Kuan Tan. "Effect of Ce Addition and Heat Treatment on Microstructure Evolution and Tensile Properties of Industrial A357 Cast Alloy." Metals 10, no. 8 (2020): 1100. http://dx.doi.org/10.3390/met10081100.

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The effects of adding different Ce contents (0–0.32 wt.%) on the microstructure, mechanical properties, and fracture morphology of industrial A357 cast alloy in as-cast and T6 heat treatment were studied. The main purpose of this study is to improve the microstructure stability and tensile properties of industrial A357 cast alloy. The microstructural analyses indicate that the addition of Ce causes refinement of the α-Al primary phase for the reason that the formation of intermetallic compounds containing (AlSiCeMg) elements enriches the front of the solid–liquid interface, which causes an inc
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39

Liu, Xiaoda, Ming Yin, Shaohua Zhang, et al. "Corrosion Behavior of the As-Cast and As-Solid Solution Mg-Al-Ge Alloy." Materials 11, no. 10 (2018): 1812. http://dx.doi.org/10.3390/ma11101812.

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The corrosion behavior of Mg-3Al-xGe (x = 1, 3, 5) alloy in as-cast and as-solid was investigated by virtue of microstructure, corrosion morphology observation, and electrochemical measurement. Among the as-cast alloys, the corrosion rate of Mg-3Al-1Ge with a discontinuous bar-morphology was the highest, which was 101.7 mm·a−1; the corrosion rate of Mg-3Al-3Ge with a continuous network distribution was the lowest, which was 23.1 mm·a−1; and the corrosion rate of Mg-3Al-5Ge of Ge-enriched phase with sporadic distribution was in-between, which was 63.9 mm·a−1. It is suggested that the morphology
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40

CHENG, LIREN, ZHANYI CAO, RUIZHI WU, and MILIN ZHANG. "ANALYSIS ON THE MICROSTRUCTURE OF THE AS-CAST AND EXTRUDED Mg-(6-10)Li-3Al-Ce-Ca ALLOYS." International Journal of Modern Physics B 23, no. 06n07 (2009): 920–26. http://dx.doi.org/10.1142/s0217979209060245.

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Microstructural characterization of as-cast and extruded experimental alloys as (A) Mg -6.86 Li -3.02 Al -1.12 Ce -0.7 Ca (B) Mg -8.15 Li -3.07 Al -1.12 Ce -0.72 Ca (C) Mg -10.54 Li -3.54 Al -1.23 Ce -0.94 Ca are researched in this paper. The results show that the as-cast specimens of (A) and (B) are composed of α ( Mg ) phase, β ( Li ) phase, rod-like and bulk Al 2 Ce compound. On the other hand, β phase ( Li ), bulk and rod-like Al 2 Ce compound, Al2 Ca compound at boundaries are observed in the as-cast (C) alloy. The addition of Ce and Ca also shows in the microstructure the presence of Al
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41

Aragón-Lezama, José Arturo. "Effects of the size and matrix microstructure on compression of borosilicate spheres - Zn22Al2Cu composites with foam behaviour." Revista Mexicana de Física 65, no. 1 (2018): 31. http://dx.doi.org/10.31349/revmexfis.65.31.

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Borosilicate spheres - Zn22Al2Cu composites with a 2.9 g/cm3 density were prepared to assess whether changes in size affect the compression behaviour and whether this effect depends on the alloy matrix microstructure. The composite material was manufactured first by alloy melting, then by sphere submersion into the liquid alloy and finally by air-cooling the resulting mixture to room temperature. The matrix microstructures used separately were as-cast microstructure and fine microstructure. They were characterised by optical and scanning electron microscopies as well as by an energy dispersive
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42

Xu, Xiangjun, Junpin Lin, Jian Guo, and Yongfeng Liang. "Friction Weldability of a High Nb Containing TiAl Alloy." Materials 12, no. 21 (2019): 3556. http://dx.doi.org/10.3390/ma12213556.

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The friction weldability of Ti-45Al-8.5Nb-0.2W-0.2B-0.02Y alloy has been investigated by optimizing process parameters and analyzing the microstructures and tensile properties of the joints. The as-cast alloy with a nearly lamellar (NL) microstructure and the as-forged alloys with a duplex (DP) microstructure have been successfully welded. All the joints have a severe deformation zone (SDZ) and a transition zone (TZ) between the parent metal (PM) and SDZ. SDZ, showing a biconcave lens geometry, has a maximum thickness of hundreds of micrometers at the periphery. TZ is hundreds of micrometers t
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43

Zhang, Li, Zheng Liu, and Ping Li Mao. "Microstructure Evolution and Mechanical Properties of Mg-2.5Zn-0.5Y Alloy." Applied Mechanics and Materials 380-384 (August 2013): 4372–75. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.4372.

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The microstructure evolution and mechanical properties of as-extruded Mg-2.5 Zn-0.5Y Mg alloy were investigated. The grainy intermetallic phases (I-phase and w-phase) observed in the as-cast Mg-2.5Zn-0.5Y alloy distributed homogeneously in the hot extruded alloys. Compared with the cast one, the extruded alloy shows predominant mechanical properties as the result of refined microstructure and the dispersed intermetallic phases formed during hot extrusion. The ultimate tensile strength and the yield tensile strength of the extruded alloy were 354.8 MPa and 305.9MPa respectively.
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44

Fu, Li, Qi Chi Le, Pei Li Gou, Xi Bo Wang, and Xuan Liu. "Effects of Ca and RE Additions on the Precipitation and Microstructure of As-Cast AZ91 Alloy." Applied Mechanics and Materials 865 (June 2017): 30–35. http://dx.doi.org/10.4028/www.scientific.net/amm.865.30.

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The effect of Ca and RE metal additions on the precipitation and microstructure of as-cast AZ91 alloy was systematically investigated. It was found that Ca and RE additions could result in phase and microstructure changes. The XRD pattern showed the crystallite phase of as-cast AZ91 alloys consists of α-Mg matrix and β-Mg17Al12, however, after adding 1.5wt. % Ca and 0.8wt. % RE (0.5wt. % Sm and 0.3wt. % La), peaks coincident with Al2Ca, Al2Sm and Al11La3 intermetallic compounds were found, suggesting the generation of relative precipitates. The SEM images indicated that in as-cast alloys, the
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45

Li, Jian Ping, Gordon W. Lorimer, Joseph D. Robson, and B. Davis. "The Microstructures of As-Cast Mg-Zr and Mg-Mn Alloys." Materials Science Forum 488-489 (July 2005): 329–32. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.329.

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The as-cast microstructures of two dilute Mg-Zr and three dilute Mg-Mn alloys were studied using optical microscopy and scanning electron microscopy, including EDX analysis. The results show that the as-cast microstructure of the Mg-Zr alloys was composed of non-dendritic, equiaxed Mg grains, with a few Zr particles within the Mg grains and along grain boundaries. The grain size of the Mg-Zr alloy was significantly reduced by the Zr addition and a fine grain structure was achieved when the zirconium concentration was above 0.4wt. %. The as-cast structure of the Mg- Mn alloys contained columnar
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46

Cizek, L., S. Rusz, O. Hilser, et al. "Microstructure and Properties of Selected Magnesium-Aluminum Alloys Prepared for SPD Processing Technology." Archives of Metallurgy and Materials 62, no. 4 (2017): 2365–70. http://dx.doi.org/10.1515/amm-2017-0348.

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AbstractA growing interest in wrought magnesium alloys has been noticed recently, mainly due to development of various SPD (severe plastic deformation) methods that enable significant refinement of the microstructure and – as a result – improvement of various functional properties of products. However, forming as-cast magnesium alloys with the increased aluminum content at room temperature is almost impossible. Therefore, application of heat treatment before forming or forming at elevated temperature is recommended for these alloys. The paper presents the influence of selected heat treatment c
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47

Augustyn-Pieniążek, J., H. Adrian, S. Rzadkosz, and M. Choroszyński. "Structure and Mechanical Properties of Al-Li Alloys as Cast." Archives of Foundry Engineering 13, no. 2 (2013): 5–10. http://dx.doi.org/10.2478/afe-2013-0027.

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Abstract The high mechanical properties of the Al-Li-X alloys contribute to their increasingly broad application in aeronautics, as an alternative for the aluminium alloys, which have been used so far. The aluminium-lithium alloys have a lower specific gravity, a higher nucleation and crack spread resistance, a higher Young’s module and they characterize in a high crack resistance at lower temperatures. The aim of the research planned in this work was to design an aluminium alloy with a content of lithium and other alloy elements. The research included the creation of a laboratorial melt, the
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48

Li, Xue Song, Li Dong Wang, Jian Wu Zhao, Jian Sheng Liu, and Li Min Wang. "Microstructure, Mechanical Properties and Corrosion Behavior of Mg-1Zn-0.5Ca Alloy." Advanced Materials Research 311-313 (August 2011): 1735–40. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1735.

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Mg-1Zn-0.5Ca alloy was prepared by casting technology. The as-cast alloy was solution treated at 470°C for 24 h and aged at 175°C for 0-50 h. The microstructure, mechanical properties and electrochemical corrosion behavior of the alloys were investigated. The results showed that the average grain size of the as-cast alloy was 120-150 μm, and the precipitated phases were distributed uniformly in α-Mg grain. The as-cast alloy showed good mechanical properties. The tensile strength was 186 MPa, and ductility was 23%. A typical age softening responses was obtained during the aging treatment. In th
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49

Nurhayani, Dinni, and Akhmad Ardian Korda. "Antimicrobial Activity and Hardness of as Cast and as Homogenized Cu-Ti Alloys." Advanced Materials Research 1130 (November 2015): 136–40. http://dx.doi.org/10.4028/www.scientific.net/amr.1130.136.

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Cu-Ti alloy, pure copper, and stainless steel AISI 304 were tested in this study for their microstructure, effect of alloying element to hardness, and antibacterial activity. The antibacterial properties were tested against E. coli suspensions. The titanium in Cu-Ti alloy was varied 1-4 wt. %, and the microstructure was modified by homogenization treatment. The antibacterial susceptibility test was done by inhibition zone measurement and bacterial suspension inoculation methods. Result showed the addition of titanium increased hardness from pure copper (44.93 HV) to 79.68-207.6 HV. No inhibiti
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50

Vlach, Martin, Ivana Stulíková, Bohumil Smola, et al. "Response of Hot-Extruded Al-Mn-Sc-Zr Alloy to Annealing with Constant Heating Rate." Defect and Diffusion Forum 334-335 (February 2013): 161–66. http://dx.doi.org/10.4028/www.scientific.net/ddf.334-335.161.

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The effect of hot extrusion at 350°C on microstructure, thermal, electrical and mechanical properties of the AlMnScZr alloy was studied. The samples of the cast and of the hot-extruded alloys were annealed from 20°C up to 600°C. Transmission and scanning electron microscopy and electron backscatter diffraction examinations of specimens quenched from temperatures of significant resistivity changes were used to identify microstructural processes responsible for these changes. The cast as well as hot-extruded alloy is characterized by a dispersion of fine coherent Al3Sc and/or Al3(Sc,Zr) particle
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