Dislocation processes in precipitate-free zones in NIMONIC PE16 studied by in situ transmission electron microscopy

被引：8

作者：

Baither, D ^{[1
]}

Krol, T ^{[1
]}

Nembach, E ^{[1
]}

机构：

[1] Univ Munster, Inst Mat Phys, D-48149 Munster, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2004年 / 387卷

关键词：

nickel alloy; particle strengthening; grain boundaries; precipitate-free zones; in situ transmission electron microscopy;

D O I：

10.1016/j.msea.2004.01.072

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Precipitate-free zones along the grain boundaries cause softening of gamma'-particle-strengthened polycrystalline NIMONIC PE16, a nickel-based superalloy containing Ni, Fe, Cr, Mo, Al, and Ti. The relevant dislocation processes were studied by means of in situ straining experiments in a transmission electron microscope. During easy and frequent cross-slip events, numerous dislocation sources are activated, which cause very localized dislocation pile-ups. These facilitate the penetration of dislocations into the interior of the grains. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：163 / 166

页数：4

共 15 条

[1] In-situ transmission electron microscopy study of dislocation processes at precipitate-free zones in a γ′-strengthened superalloy [J].