Notch effect on the tensile properties of cold-rolled Ni3Al foils

被引：0
|
作者：
Cui, C. Y. [1 ,2 ]
Hirano, T. [2 ]
机构：
[1] Inst Met Sci & Technol, Shenyang 110016, Peoples R China
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
来源：
INTERMETALLICS | 2011年 / 19卷 / 03期
关键词：
Nickel aluminides; based on Ni3Al foil; Mechanical properties at ambient temperature; Brittleness and ductility; Crack initiation; Rolling; Mechanical testing; ROOM-TEMPERATURE DUCTILITY; STOICHIOMETRIC NI3AL; UNIDIRECTIONAL SOLIDIFICATION; IMPROVEMENT; BORON;
D O I：
10.1016/j.intermet.2010.11.004
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Notch effect on the tensile properties of the Ni3Al foils has been investigated as a function of notch geometry and foil's thickness. Tensile tests along the rolling direction (RD) and the transverse direction (TD) showed that notch weakening occurred with introduce of a notch. Plastic deformation was observed locally at notch root and the effective stress concentration factor (k(e)) was much lower than the theoretical stress concentration factor (K-t). Contrary to the anisotropy in fracture stress along the RD and the TD, k(e) fell on the same curve. Crack initiation mechanism was different between two tensile directions, that is, cracks initiated along the shear band in the RD tension, while cracks initiated homogenously on the slip planes in the TD tension. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：390 / 395
页数：6
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