Deformation twinning with zero macroscopic strain in a coarse-grained Ni-Co-based superalloy

被引：46

作者：

Xu, Y. J. ^{[1
]}

Du, K. ^{[1
]}

Cui, C. Y. ^{[2
]}

Ye, H. Q. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China

来源：

SCRIPTA MATERIALIA | 2014年 / 77卷

关键词：

Deformation twin; Zero strain; Stacking fault; Superalloy; FORMATION MECHANISM; NANOCRYSTALLINE; TWINS; STRENGTH; METALS; AL;

D O I：

10.1016/j.scriptamat.2014.01.030

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Macroscopically zero-strained twin lamellae are observed in a coarse-grained Ni-Co-based superalloy after plastic deformation. The twin lamellae presented as three layers of overlapping stacking faults with zero overall Burgers vector. The atomic stacking sequence in the twin lamellae is consistent with pairs of parallel stacking faults at neighboring or next-neighboring glide planes. The twinning is facilitated by the low stacking fault energy of the superalloy and the lengthening of stacking faults by shear stress from nearby stacking faults. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：71 / 74

页数：4