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DOI	10.1016/j.scib.2021.06.021
	Brittle-to-ductile transition in Ti–Pt intermetallic compounds
	Zhao B.; Zhang Q.; Fu X.; Qiao D.; Zhang L.; Chen X.; Gu L.; Lu Y.; Yu Q.
发表日期	2021
ISSN	20959273
英文摘要	Phase transformation changes numerous properties of materials. Ti–Pt alloys have received much interest because of high martensitic transformation temperature. However, the intrinsic brittleness of these intermetallic compounds with low crystal symmetry and complicated phase structure limit their applications, especially when composition deviates from stoichiometry ratio. By performing in situ heating high-resolution scanning transmission electron microscopy experiment and micro-mechanical testing on Ti-35 at% Pt that contained majorly Ti3Pt and αTiPt phases, it was found that precipitating herringbone twinned αTiPt islands within Ti3Pt could occur upon heating, significantly refining mixed-phase structure. The refinement of multi-intermetallic mixed-phase structure endowed brittle material with remarkable capacity for plastic deformation and strain hardening. The plastic deformation mechanisms include phase transformation upon yielding and dislocation slips during hardening, which rarely occurs in intermetallic compounds with low symmetry. The strong interaction between different deformation modes even caused nano-crystallization along slip bands. The results demonstrate that brittle-to-ductile transition in intermetallic compounds can be achieved by tuning mixed-phase structure through phase transformations. © 2021 Science China Press
关键词	Brittle-to-ductile transition Ductility Intermetallic compounds Phase transformation Structure refinement
英文关键词	Binary alloys; Brittleness; Crystal symmetry; Ductility; Fracture mechanics; High resolution transmission electron microscopy; Martensitic transformations; Mechanical testing; Phase structure; Plastic deformation; Plasticity; Platinum alloys; Scanning electron microscopy; Strain hardening; Titanium alloys; Brittle-to-ductile transition; In-situ heating; Intermetallics compounds; Martensitic transformation temperatures; Mixed phase; Phases transformation; Property; Pt alloy; Stoichiometry ratio; Structure refinements; Intermetallics
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207679
作者单位	Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China; Beijing National Laboratory for Condensed Matter Physics, Collaborative Innovation Center of Quantum Matter, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China; Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China; College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China; Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
推荐引用方式 GB/T 7714	Zhao B.,Zhang Q.,Fu X.,等. Brittle-to-ductile transition in Ti–Pt intermetallic compounds[J],2021.
APA	Zhao B..,Zhang Q..,Fu X..,Qiao D..,Zhang L..,...&Yu Q..(2021).Brittle-to-ductile transition in Ti–Pt intermetallic compounds.Science Bulletin.
MLA	Zhao B.,et al."Brittle-to-ductile transition in Ti–Pt intermetallic compounds".Science Bulletin (2021).