Letteratura scientifica selezionata sul tema "Ductility"

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Articoli di riviste sul tema "Ductility"

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Mander, John B. "Beyond ductility." Bulletin of the New Zealand Society for Earthquake Engineering 37, no. 1 (2004): 35–44. http://dx.doi.org/10.5459/bnzsee.37.1.35-44.

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Although the precepts of capacity design and detailing for ductile performance are now well established, the end-user community is now demanding more in terms of predictable performance with an expectation that structures should survive earthquakes with minimal and preferably no damage. The paper first explains the shortcomings of present designs from a probabilistic fragility point-of-view, and then goes on to explain how performance can be improved by making a paradigm shift. This paper examines the emerging quest where structural engineering researchers are investigating design alternatives
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Zhu, Yuntian T., and Xiaozhou Liao. "Retaining ductility." Nature Materials 3, no. 6 (2004): 351–52. http://dx.doi.org/10.1038/nmat1141.

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Reyes-Salazar, Alfredo. "Ductility and ductility reduction factor for MDOF systems." Structural Engineering and Mechanics 13, no. 4 (2002): 369–85. http://dx.doi.org/10.12989/sem.2002.13.4.369.

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Darveaux, Robert, Michael Johnson, and Corey Reichman. "Solder Joint Ductility." International Symposium on Microelectronics 2012, no. 1 (2012): 001046–56. http://dx.doi.org/10.4071/isom-2012-thp15.

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Solder joint arrays were tested under tensile loading to determine the strain-to-failure (ductility) under a wide range of conditions. The trends in ductility with alloy, joint size, pad metallization, and test conditions were quantified and discussed. 63Sn37Pb solder joints showed a significant increase in ductility as applied stress is reduced below 40MPa. Lead free alloy ductility was much less sensitive to applied stress level. Hence, at low stress levels, eutectic SnPb has greater ductility than the lead free alloys. Larger joints showed greater ductility in a constant crosshead rate test
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Grocholski, Brent. "Pathways for ductility." Science 370, no. 6512 (2020): 70.12–72. http://dx.doi.org/10.1126/science.370.6512.70-l.

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Sealy, Cordelia. "Defects define ductility." Materials Today 10, no. 4 (2007): 15. http://dx.doi.org/10.1016/s1369-7021(07)70041-x.

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Gensamer, Maxwell. "Strength and Ductility." Metallography, Microstructure, and Analysis 6, no. 2 (2017): 171–85. http://dx.doi.org/10.1007/s13632-017-0341-1.

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Wang, H., Y. Zhang, and S. Qin. "A Study on Ductility of Prestressed Concrete Pier Based on Response Surface Methodology." Engineering, Technology & Applied Science Research 6, no. 6 (2016): 1253–57. http://dx.doi.org/10.48084/etasr.855.

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The ductility of prestressed concrete pier is studied based on response surface methodology. Referring to the pervious prestressed concrete pier, based on Box-Behnken design, the ductility of 25 prestressed concrete piers is calculated by numerical method. The relationship between longitudinal reinforcement ratio, shear reinforcement ratio, prestressed tendon quantity, concrete compressive strength and ductility factor is gotten. The influence of the longitudinal reinforcement ratio, the shear reinforcement ratio, the prestressed tendon quantity and concrete compressive strength to curvature d
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Wang, H., Y. Zhang, and S. Qin. "A Study on Ductility of Prestressed Concrete Pier Based on Response Surface Methodology." Engineering, Technology & Applied Science Research 6, no. 6 (2016): 1253–57. https://doi.org/10.5281/zenodo.225511.

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The ductility of prestressed concrete pier is studied based on response surface methodology. Referring to the pervious prestressed concrete pier, based on Box-Behnken design, the ductility of 25 prestressed concrete piers is calculated by numerical method. The relationship between longitudinal reinforcement ratio, shear reinforcement ratio, prestressed tendon quantity, concrete compressive strength and ductility factor is gotten. The influence of the longitudinal reinforcement ratio, the shear reinforcement ratio, the prestressed tendon quantity and concrete compressive strength to curvature d
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Urbini, Flavio, Emanuela Caracuzzo, Antonio Chirumbolo, and Antonino Callea. "Individual and Organizational Ductility: Conceptualization, Development, and Validation of a New Scale." Behavioral Sciences 14, no. 6 (2024): 511. http://dx.doi.org/10.3390/bs14060511.

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In this article, we conceptualize a new construct named “ductility” and propose a measurement instrument. We examine psychometric properties—the factorial validity and reliability of the Ductility Scale in Italy. The results of exploratory factor analysis showed that the scale has a two-factor structure, namely, individual and organizational ductility. The scale reliability was excellent for both dimensions (individual ω = 0.82; organizational ω = 0.85). The participants were employees from private and public organizations (n = 466). We tested the construct validity of the Ductility Scale. The
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Tesi sul tema "Ductility"

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Mohamed, Z. M. E. Q. "Hot ductility of steels." Thesis, City University London, 1988. http://openaccess.city.ac.uk/8348/.

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The hot tensile test has been used for a variety of steels, to investigate the influence of such factors as inclusions, precipitation, phase transformation and grain size on hot ductility. Tests were performed in the temperature range 700-1000 °C and at a strain .4 _2 1 rates of (10 —10 S ), generally to simulate the conditions experienced during the straightening operation in the continuous casting process in which transverse cracks propagate. Two zones of reduced ductility can be identified. The Y-a transformation zone which has been shown to produce a significant ductility trough due to str
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Abu, Shousha R. I. "Hot ductility of steels." Thesis, City University London, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305120.

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Wassouf, Mohamad. "Bond and ductility of concrete reinforced with various steel bars surface and ductility conditions." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6272/.

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Reinforced concrete is a wide field for researches and studies in civil engineering subject. It is due to the fact that reinforced concrete is the most widely used material for the infrastructure in the world. Reinforced concrete consists of two main materials: reinforcing steel and concrete, each of those two materials has its own effect on the performance of the structure. In this thesis, the change in RC performance due to different steel properties and specifications will be investigated. The study focuses on the bond interaction between steel and concrete and the flexural behaviour of RC
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Crowther, David Neville. "The hot ductility of steels." Thesis, City, University of London, 1986. http://openaccess.city.ac.uk/19368/.

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Hot tensile tests have been performed on a variety of plain carbon and micro-alloyed steels, in order to determine the influence of such factors as phase transformation, grain size and precipitation on hot ductility. The γ-∝ phase transformation has been shown to produce a significant ductility trough in the high temperature tensile behaviour of plain C steels, and factors which alter the A3 temperature, such as cooling rate and C content, have been shown to produce a change in the temperature at which the ductility trough occurs. This ductility trough is due to strain concentration in the fer
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Eon, Kang Shin. "Hot ductility of TWIP steels." Thesis, City University London, 2014. http://openaccess.city.ac.uk/13703/.

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TWIP (Twining Induced Plasticity) steel is very promising AHSS (Advanced High Strength Steel) grade owing to its superior toughness and ductility. Recently it has attracted the interest of the automotive and steelmaking industries, as the need for reducing weight to provide better fuel efficiency is of paramount importance with the gradual depletion of fuel resources. A high Al, TWIP steel is being commercially developed as Al has been found very well in delaying fraction in deep drawn products. However these steels are difficult to continuous cast and cracking can occur at the slab surface. T
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Occhiuzzi, Antonio. "Seismic ductility of base isolated structures." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35011.

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Henriques, José Alexandre Gouveia. "Ductility requirements in shear bolted connections." Master's thesis, Departamento de Engenharia Civil, 2007. http://hdl.handle.net/10316/15762.

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Soesianawati, M. T. "Limited ductility design of reinforced concrete columns." Thesis, University of Canterbury. Department of Civil Engineering, 1986. http://hdl.handle.net/10092/3643.

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This report describes an experimental and analytical investigation of the strength and ductility of reinforced concrete columns. Four columns of square cross-section were tested under axial compression loading and cyclic lateral loading applied at mid-height which simulated seismic loading. The main variable investigated was the quantity of transverse confining steel used, which ranged between 17 to 46 percent of the NZS 3101:1982 recommended quantity for ductile detailing. The experimental results are reported in the form of lateral loaddisplacement and lateral load-curvatures hysteresis loop
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Lobato, de Sousa Monteiro de Morais Miguel Nuno. "Ductility of beams prestressed with FRP tendons." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614171.

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Wolff, Ira M. "Ductility in high chromium super-ferritic alloys." Doctoral thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/22200.

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Abstract (sommario):
Includes reprints of author's related articles.<br>Bibliography: pages 187-201.<br>The competition between microfracture and plastic flow has been studied in relation to the thermomechanical processing parameters and minor element chemistry of wrought super-ferritic alloys based on a composition of Fe-40wt% Cr. These alloys have been developed for corrosion-resistant applications, specifically by micro-alloying with platinum group metals to induce cathodic modification, but their use has been hampered by inadequate toughness at ambient temperatures. Brittle cleavage of the alloys is a conseque
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Libri sul tema "Ductility"

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Zhao, Yonghao, and Xiaozhou Liao. Ductility of bulk nanostructured materials. Trans Tech, 2010.

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Gioncu, Victor. Ductility of seismic resistant steel structures. Spon Press, 2001.

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M, Mazzolani Federico, ed. Ductility of seismic resistant steel structures. Spon Press, 2002.

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1943-, Usami Tsutomu, Itoh Yoshito 1952-, and International Colloquium on Stability and Ductility of Steel Structures (5th : 1997 : Nagoya, Japan), eds. Stability and ductility of steel structures. Elsevier, 1998.

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Guha, Sumit. Improving the low temperature ductility of NiAl. National Aeronautics and Space Administration, 1992.

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Salomon, R. J. The ductility behaviour of incoloy alloy MA956. University of Birmingham, 1994.

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O, Scattergood Ronald, and United States. National Aeronautics and Space Administration., eds. Ductile-regime turning of germanium and silicon. National Aeronautics and Space Administration, 1989.

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O, Scattergood Ronald, and United States. National Aeronautics and Space Administration., eds. Ductile-regime turning of germanium and silicon. National Aeronautics and Space Administration, 1989.

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V, Nathal Michael, and United States. National Aeronautics and Space Administration., eds. Tensile behavior of Fe-40A1 alloys with 8 and Zr additions. National Aeronautics and Space Administration, 1986.

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V, Nathal Michael, and United States. National Aeronautics and Space Administration., eds. Tensile behavior of Fe-40A1 alloys with 8 and Zr additions. National Aeronautics and Space Administration, 1986.

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Capitoli di libri sul tema "Ductility"

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Sandström, Rolf. "Creep Ductility." In Basic Modeling and Theory of Creep of Metallic Materials. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-49507-6_13.

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AbstractFor a number of creep resistant steels, the creep ductiliy decreases with increasing temperature and time. As a function of stress, the ductiity is often describe with an S-shaped curve with an upper and a lower shelf level. As a function of time, the S-shape is inverted. If the ductility is high, the rupture is referred to as ductile, and for low ductility levels as brittle. Ductile rupture is believed to be due to a plastic instability such as necking. Brittle rupture on the other hand is controlled by the nucleation, growth and linkage of creep cavities. With the help of the basic m
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Gooch, Jan W. "Ductility." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_4087.

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Bhanja, Santanu. "Ductility design." In Reinforced Concrete Design. CRC Press, 2024. http://dx.doi.org/10.1201/9781003415398-17.

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Zeris, C. "Behavior Factor and Ductility." In Encyclopedia of Earthquake Engineering. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-36197-5_118-1.

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Zeris, Christos A. "Behavior Factor and Ductility." In Encyclopedia of Earthquake Engineering. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-35344-4_118.

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Bhadeshia, Harshad K. D. H. "Ductility, Toughness and Fatigue." In Pearlite in Steels. CRC Press, 2024. http://dx.doi.org/10.1201/9781032631981-5.

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Papagiannopoulos, George A., George D. Hatzigeorgiou, and Dimitri E. Beskos. "Ductility-Based Plastic Design." In Seismic Design Methods for Steel Building Structures. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80687-3_6.

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Tsuji, Nobuhiro, Shigenobu Ogata, Haruyuki Inui, Isao Tanaka, and Kyosuke Kishida. "Proposing the Concept of Plaston and Strategy to Manage Both High Strength and Large Ductility in Advanced Structural Materials, on the Basis of Unique Mechanical Properties of Bulk Nanostructured Metals." In The Plaston Concept. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7715-1_1.

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AbstractAdvanced structural materials are required to show both high strength and large ductility/toughness, but we have not yet acquired the guiding principle for that. The bulk nanostructured metals are polycrystalline metallic materials having bulky dimensions and average grain sizes smaller than 1 μm. Bulk nanostructured metals show very high strength compared with that of the coarse-grained counterparts, but usually exhibit limited tensile ductility, especially small uniform elongation below a few %, due to the early plastic instability. On the other hand, we have recently found that part
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Wang, Qi, and Shunzhong Yao. "Seismic Performance Analysis of Non-uniformly Corroded Reinforced Concrete Column Assembly Joints Strengthened with CFRP." In Novel Technology and Whole-Process Management in Prefabricated Building. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-5108-2_30.

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AbstractIn order to analyze the seismic behavior of non uniformly corroded reinforced concrete column assembly joints strengthened with CFRP. In this paper, one corroded and unreinforced RC column specimen and four corroded but CFRP Reinforced RC column specimens were fabricated. According to the hysteretic curve, the skeleton curve change and stiffness degradation of each specimen are analyzed, and the load displacement condition of the assembled joint is judged. According to the strain of the assembled joint of reinforced concrete column, the ductility, energy consumption and other propertie
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Moritoki, Hitoshi. "Free Surface Ductility in Upsetting." In Anisotropy and Localization of Plastic Deformation. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3644-0_151.

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Atti di convegni sul tema "Ductility"

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Muñoz Irigoyen, Carlos Alejandro, Oscar Alberto López Bátiz., and José de la Cruz Sebastián Serrano Vega. "Comparison of the behavior of Reinforced Concrete Frame Structures Designed with low Ductility and High Ductility." In IABSE Congress, San José 2024: Beyond Structural Engineering in a Changing World. International Association for Bridge and Structural Engineering (IABSE), 2024. https://doi.org/10.2749/sanjose.2024.1265.

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&lt;p&gt;This study presents a comparative analysis of the behavior of reinforced concrete frame structures, with an emphasis on the influence of reinforcement and detailing in connections. During the earthquakes that occurred in Turkey on February 6, 2023, the performance of this type of system without proper connection detailing was inadequate. In this article, the behavior of three buildings is analytically simulated, considering three levels of detailing: the first with a strength-based detailing level, the second with a low ductility level (Q=2), and the third with a high ductility level
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Caruso, Matthew, Samuel Crowley, and Lesley Frame. "Hot Ductility of 70/30 Copper-Nickel Alloys." In IFHTSE 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.ifhtse2024p0179.

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Abstract Ductility dip cracking (DDC) is a detrimental solid-state cracking phenomenon that can occur during welding of copper-nickel (Cu-Ni) alloys used in naval vessels. The presence of these cracks has several deleterious effects, including reduced fatigue life and increased susceptibility to corrosion. The mechanism of DDC remains highly debated and understudied, especially in material systems outside of Ni-Cr-Fe alloys. The predominant mechanisms that have been proposed include: 1. Grain boundary sliding, 2. Precipitate-induced strain, and 3. Impurity element segregation. In the present b
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Komai, Nobuyoshi, Ko Arisue, Keita Hashimoto, Nobuhiko Saito, and Kimihiko Tominaga. "Creep Rupture Strength and Ductility of Grade 92 Steel." In AM-EPRI 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0461.

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Abstract This study aims to elucidate the chemical compositions and microstructural factors that affect longterm creep rupture strength and creep rupture ductility using multiple heats of Gr.92 steel. Evaluating the reduction behavior in long-term creep rupture strength, we propose a relative creep rupture strength value, which is expressed as the logarithmic ratio of the estimated creep strength for each rupture time exceeding 10,000 hours, with 10,000 hours as the reference. Higher initial hardness correlates with greater pronounced strength reduction in the long-term regime. While smaller p
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Bryant, Jon R., and Ernst Wallis. "Ductility of Precipitation Hardenable Nickel Alloy Following Hydrogen Absorption." In CORROSION 1988. NACE International, 1988. https://doi.org/10.5006/c1988-88068.

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Abstract This study was undertaken to better define the effects of hydrogen absorption on the ductility of alloy UNS N05500. Samples were cathodically charged with hydrogen followed by slow strain rate tensile testing. The samples consisted of forged rods and one piece of cold rolled strip. For comparison, alloy UNS N07718 was also tested in rod and strip form. Tensile strength increased as a function of charging time (1-15 days) and the ductility clearly dropped as measured by percent loss in elongation. Strip material was more susceptible to hydrogen embrittlement than the rod specimens for
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Poirier, D., B. Guerreiro, B. Jodoin, A. Weck, and J. D. Giallonardo. "Laser Heat Treatment for Improved Cold-Sprayed Copper Coating Ductility." In ITSC 2025. ASM International, 2025. https://doi.org/10.31399/asm.cp.itsc2025p0376.

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Abstract This work aims to evaluate the viability of laser heat treatments as a method to recover cold-sprayed coating ductility, i.e., to achieve with laser heat treatment a gain in elongation equivalent to a furnace heat treatment. A 4kW YAG laser was employed to heat treat 4-5 mm thick coldsprayed copper coatings produced on coupons and on prototypes of large components. Surface temperatures were monitored during the heat treatment using an infrared camera. Hardness and tensile properties were measured on as-sprayed and heat-treated coatings. Microstructural examinations provided additional
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Piermattei, E. J., B. F. Ronalds, and D. J. Stock. "Jacket Ductility Design." In Offshore Technology Conference. Offshore Technology Conference, 1990. http://dx.doi.org/10.4043/6383-ms.

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Moghaddam, Hasan A., and Maysam Samadi. "On the Effect of Ductility of Confining Material on Concrete Ductility." In Structures Congress 2009. American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41031(341)28.

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Şen, Ornela Lalaj, Mehmet Çevik, and Ali Haydar Kayhan. "Sectional Ductility of Wide Beams." In International Students Science Congress. Izmir International Guest Student Association, 2021. http://dx.doi.org/10.52460/issc.2021.051.

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Wide beam structures are categorized as Limited Ductility Class in Turkey and elsewhere and considered not fit for construction in areas of high seismicity. One of the main reasons that wide beam structures are considered to possess limited ductility is the perceived low local ductility of the wide beams, due to the high reinforcement ratios. Wide beams have small depths, which indeed require higher reinforcement ratios to produce the necessary moment capacities, as compared to normal beams. However, the low local ductility of the wide beams can be contested. This paper presents a database of
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Orlacchio, Mabel, Georgios Baltzopoulos, and Iunio Iervolino. "CONSTANT-DUCTILITY RESIDUAL DISPLACEMENT RATIOS." In 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2019. http://dx.doi.org/10.7712/120119.7271.18881.

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Yamaguchi, N., and M. Nakao. "Ductility-Related Force Modification Factors of Wood Constructions with Shear Walls of Different Ductility." In ATC and SEI Conference on Improving the Seismic Performance of Existing Buildings and Other Structures. American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41084(364)73.

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Rapporti di organizzazioni sul tema "Ductility"

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Billone, M., T. Burtseva, Y. Chen, and Z. Han. Ductility of Zircaloy-4 Sibling Pin Cladding. Office of Scientific and Technical Information (OSTI), 2023. http://dx.doi.org/10.2172/1973847.

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Bair, Jacob, David Abrecht, Nicole Overman, et al. Improving Ductility of Hydride Embrittled Zirconium: Final Report. Office of Scientific and Technical Information (OSTI), 2020. http://dx.doi.org/10.2172/2203117.

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Nieh, T., C. Schuh, M. Caturla, and A. Hodge. Enhancement of Strength and Ductility in Bulk Nanocrystalline Metals. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/15013859.

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Taleff, E. M., G. A. Henshall, D. R. Lesuer, T. G. Nieh, and J. Wadsworth. Enhanced tensile ductility of coarse-grain Al-Mg alloys. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/201796.

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Rath, B. B., M. A. Imam, B. K. Damkroger, and G. R. Edwards. High temperature ductility loss in titanium alloys -- A review. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/10124556.

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Kang, Bruce. Ductility Enhancement of Molybdenum Phase by Nano-sized Oxide Dispersions. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/1109082.

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Geltmacher, A., and D. A. Koss. On Specimen Shape Effects and the Ductility of Porous Metals. Defense Technical Information Center, 1989. http://dx.doi.org/10.21236/ada206216.

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Bruce Kang. Ductility Enhancement of Molybdenum Phase by Nano-sizedd Oxide Dispersions. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/952943.

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Gill. L51675 Effects of Weldment Property Variations on the Behavior of Line Pipe. Pipeline Research Council International, Inc. (PRCI), 1993. http://dx.doi.org/10.55274/r0010133.

Testo completo
Abstract (sommario):
A steel weldment is a composite of zones or layers of different microstructures that possess different material properties. The zones include the base metal (or the sections of pipe), the weld metal, and a complex heat-affected zone (HAZ) of base metal that has been exposed to a variety of thermal cycles resulting in varying microstructures. The material properties of primary concern with respect to the mechanical behavior of the pipe are the stress-strain response (the constitutive properties) and the resistance to initiation and propagation of cracks or tears in the presence of a crack, notc
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10

Wada, Y., R. Ishigaki, Y. Tanaka, and K. Ohnishi. DTRS-3878-HEELAS Hydrogen Environment Embrittlement of Low Alloy Steel at Room Temperature. Pipeline Research Council International, Inc. (PRCI), 1998. http://dx.doi.org/10.55274/r0011860.

Testo completo
Abstract (sommario):
To verify the safety application and use of Cr-Mo steel for the high-pressure hydrogen equipment, tensile, fatigue, and crack growth tests of JIS-G4105-1979 SCM435 and 440 steel under 45MPa high-pressure hydrogen at room temperature were conducted. There were no significant differences in tensile deformation behaviors between the air environment and 45MPa hydrogen until the maximum load point. However, the hydrogen tested specimen broke with less ductility accompanied by many surface crack on the specimen surface which is caused by the specimen machining. The scatter of ductility was observed
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