Q
Qian Yu
Researcher at Zhejiang University
Publications - 77
Citations - 5838
Qian Yu is an academic researcher from Zhejiang University. The author has contributed to research in topics: Dislocation & Deformation mechanism. The author has an hindex of 25, co-authored 76 publications receiving 3631 citations. Previous affiliations of Qian Yu include University of Electronic Science and Technology of China & Lawrence Berkeley National Laboratory.
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Journal ArticleDOI
Tuning element distribution, structure and properties by composition in high-entropy alloys.
Qingqing Ding,Yin Zhang,Xiao Chen,Xiaoqian Fu,Dengke Chen,Sijing Chen,Lin Gu,Fei Wei,Hongbin Bei,Yanfei Gao,Yanfei Gao,Minru Wen,Jixue Li,Ze Zhang,Ting Zhu,Robert O. Ritchie,Robert O. Ritchie,Qian Yu +17 more
TL;DR: Atomic-resolution chemical mapping reveals deformation mechanisms in the CrFeCoNiPd alloy that are promoted by pronounced fluctuations in composition and an increase in stacking-fault energy, leading to higher yield strength without compromising strain hardening and tensile ductility.
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Nanoscale origins of the damage tolerance of the high-entropy alloy CrMnFeCoNi
Zi Jiao Zhang,Minmin Mao,Jiangwei Wang,Bernd Gludovatz,Ze Zhang,Scott X. Mao,Scott X. Mao,Easo P. George,Qian Yu,Robert O. Ritchie,Robert O. Ritchie +10 more
TL;DR: A synergy of multiple deformation mechanisms is identified, rarely achieved in metallic alloys, which generates high strength, work hardening and ductility, including the easy motion of Shockley partials, their interactions to form stacking-fault parallelepipeds, and arrest at planar slip bands of undissociated dislocations.
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Dislocation network in additive manufactured steel breaks strength–ductility trade-off
Leifeng Liu,Qingqing Ding,Yuan Zhong,Ji Zou,Jing Wu,Yu-Lung Chiu,Jixue Li,Ze Zhang,Qian Yu,Zhijian Shen +9 more
TL;DR: In this article, the authors show that the pre-existing dislocation network, which maintains its configuration during the entire plastic deformation, is an ideal modulator that is able to slow down but not entirely block the dislocation motion.
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Strong crystal size effect on deformation twinning
TL;DR: A ‘stimulated slip’ model is developed to explain the strong size dependence of deformation twinning in crystals, and the sample size in transition is relatively large and easily accessible in experiments, making the understanding of size dependence relevant for applications.
Journal ArticleDOI
Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy
Z. Zhang,Hongwei Sheng,Zhang-Jie Wang,Bernd Gludovatz,Ze Zhang,Easo P. George,Qian Yu,Scott X. Mao,Scott X. Mao,Robert O. Ritchie,Robert O. Ritchie +10 more
TL;DR: Deformation mechanisms in the medium-entropy alloy CrCoNi that exhibits one of the highest combinations of strength, ductility and toughness on record are examined, finding that a three-dimensional (3D) hierarchical twin network forms from the activation of three twinning systems.