Superplasticity of single-phase Ni-45Al intermetallics with large grains

被引：21

作者：

Jiang, DM ^{[1
]}

Lin, DL ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Educ Minist China High Temp Mat & Tests, Open Lab, Shanghai 200030, Peoples R China

来源：

MATERIALS LETTERS | 2002年 / 57卷 / 03期

基金：

中国国家自然科学基金;

关键词：

binary NiAl; large-grained; superplasticity; continuous recovery; continuous recrystallization; high-temperature deformation;

D O I：

10.1016/S0167-577X(02)00866-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Superplasticity was found in single-phase Ni-45Al alloy with initial grain size of 270 mum. A maximum elongation of 245% was obtained. The grains refined after superplastic deformation. TEM observation showed that an unstable subgrain boundary network formed during superplastic deformation. The subgrain boundaries were transformed into low- and high-angle grain boundaries by absorbing gliding dislocations. The large-grained superplastic phenomenon could be explained by continuous recovery and recrystallization. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：747 / 752

页数：6

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