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Deformation Mechanisms of Twinning-Induced Plasticity Steel under Shock-Load: Investigated by Synchrotron X-ray Diffraction

1
School of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, UK
2
High Temperature Materials, Wood plc, Birchwood Park, Warrington, Cheshire WA3 6GA, UK
3
Guangdong Technion—Israel Institute of Technology, Shantou 515063, China
4
Technion—Israel Institute of Technology, Haifa 32000, Israel
*
Author to whom correspondence should be addressed.
Quantum Beam Sci. 2019, 3(3), 15; https://doi.org/10.3390/qubs3030015
Received: 6 May 2018 / Revised: 30 June 2018 / Accepted: 6 June 2019 / Published: 6 July 2019
(This article belongs to the Special Issue Strain, Stress and Texture Analysis with Quantum Beams)
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Abstract

As an ideal candidate material for automobiles, twinning-induced plasticity (TWIP) steels possess excellent formability, high strength and high energy absorption ability during collision. This is attributed to its deformation mechanism of mechanical twinning, resulting in a high work hardening rate. In the current study, deformation mechanisms of low-stacking fault energy TWIP steel, under different strain rates between 0.01/s to 1581/s, were investigated by high-energy X-ray diffraction. After compression, grains with {110}||compression direction became favourable. Higher intensity was observed near brass and A components in the selected orientation distribution function (ODF) section (φ2 = 45°) for all the compressed specimens. The activity of twinning was found to be the highest in the specimens that had been compressed with medium–high strain rates (e.g., 100/s and 10/s), while the texture component related to slip had stronger intensity in the specimen deformed with a quasi-static strain rate (0.01/s). View Full-Text
Keywords: twinning-induced plasticity steel; high-energy X-ray diffraction; deformation mechanisms twinning-induced plasticity steel; high-energy X-ray diffraction; deformation mechanisms
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Yan, K.; Callaghan, M.D.; Liss, K.-D. Deformation Mechanisms of Twinning-Induced Plasticity Steel under Shock-Load: Investigated by Synchrotron X-ray Diffraction. Quantum Beam Sci. 2019, 3, 15.

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