Formation of annealing twins in f.c.c. crystals

被引：581

作者：

Mahajan, S ^{[1
]}

Pande, CS ^{[1
]}

Imam, MA ^{[1
]}

Rath, BB ^{[1
]}

机构：

[1] USN,RES LAB,WASHINGTON,DC 20375

来源：

ACTA MATERIALIA | 1997年 / 45卷 / 06期

关键词：

D O I：

10.1016/S1359-6454(96)00336-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A microscopic model for the formation of annealing twins in f.c.c. crystals is proposed. It is argued that Shockley partial loops nucleate on consecutive {111} planes by growth accidents occurring on migrating {111} steps associated with a moving grain boundary. The higher the velocity of the boundary, the higher the twin density. The absence of twins in high stacking fault energy materials and the influence of temperature on twin density can be rationalized in terms of the model. Additional supporting, circumstantial evidence has been developed by examining the influence of deformation damage on the incidence of twinning in copper and the effect of boron in reducing twin density in annealed nickel. (C) 1997 Acta Metallurgica Inc.

引用

页码：2633 / 2638

页数：6

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