INVESTIGATION ON APBS AND DISSOCIATION OF SUPER DISLOCATIONS IN TIAL BY APFIM

被引：11

作者：

LIU, ZG

FROMMEYER, G

KREUSS, M

机构：

[1] Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, D-4000

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1991年 / 64卷 / 03期

关键词：

D O I：

10.1080/09500839108214676

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The atomic stacking sequence along the <001> direction in gamma-TiAl (L1(0) type of structure) of an as-cast two phase TiAl/Ti3Al intermetallic alloy with Cr and Si additions has been investigated by field ion microscopy (FIM) and supported atom probe microanalysis. The gamma-phase possesses a high degree of ordering. During cooling thermally formed (100) antiphase boundaries (APBs), super dislocations, as well as super partial dislocations were observed and detected by APFIM. From this it is suggested that the addition of Cr lowers the APB energy in TiAl and the origin of the APBs is related to the displacement of 1/2<011> super partial dislocations.

引用

页码：117 / 124

页数：8

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