SHEAR MECHANISMS OF THE GAMMA'-PHASE IN SINGLE-CRYSTAL SUPERALLOYS AND THEIR RELATION TO CREEP

被引：95

作者：

LINK, T

FELLERKNIEPMEIER, M

机构：

[1] Institut für Metallforschung, Technische Universität Berlin

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1992年 / 23卷 / 01期

关键词：

D O I：

10.1007/BF02660857

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The development of dislocation configurations in a single-crystal superalloy during creep and especially the shear mechanism of the gamma' phase is investigated by a transmission electron microscopy (TEM) study. Detailed analysis shows that at low strains and at coherent interfaces, shearing occurs by dissociation of matrix dislocations at the gamma/gamma' interfaces, while at high strains and incoherent interfaces, cutting of the gamma' phase is achieved by antiphase boundary (APB) coupled dislocation pairs. The results are discussed in their connection to creep behavior.

引用

页码：99 / 105

页数：7

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