期刊
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
卷 50A, 期 5, 页码 2126-2138出版社
SPRINGER
DOI: 10.1007/s11661-019-05157-5
关键词
-
资金
- China Scholarship Council [201706290055]
- National Natural Science Foundation of China [51275414, 51605387]
- Fundamental Research Funds for the Central Universities [3102015BJ (II) ZS007]
- Research Fund of the State Key Laboratory of Solidification Processing (NWPU), China [130-QP-2015]
- Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University [Z2018076]
Gradient materials have been reported to have superior strength-ductility combinations. In this study, gradient martensite were introduced along the radial direction of cylindrical Ti-10V-2Al-3Fe (Ti-1023) samples by torsional straining, which simultaneously improved strength and ductility. The torsional strain gradient produced martensite gradient with increasing density and decreasing thickness from center to surface. martensite had parallel and V-shaped morphology, which not only divided coarse grains into finer blocks but also blocked dislocation slip. In addition, dislocation slip in the martensite and blocks led to grain refinement. The formation of geometrically necessary dislocation (GNDs) and the increasing shear stress required for martensitic transformation contributed to high strain hardening. An optimal gradient distribution exists in torsion-processed samples for the optimal mechanical properties. (C) The Minerals, Metals & Materials Society and ASM International 2019
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据