DEFORMATION MODES γ' PRECIPITATION HARDENED NICKEL-BASE ALLOYS
- 1 December 1974
- journal article
- Published by EDP Sciences in Le Journal de Physique Colloques
- Vol. 35 (C7) , C7-35
- https://doi.org/10.1051/jphyscol:1974702
Abstract
By a detailed consideration of the geometrical consequences of shear displacements in Ll2 γ' and the requirement of compatibility with the fcc γ matrix, it has been possible to define the shear modes potentially operative in γ' precipitation hardened nickel-base alloys. Most of these geometrically possible deformation modes have, in fact, been observed. The predominant mechanisms are planar glide on { 111 } of paired a/2 < 110 > dislocations at low temperature and viscous cutting of γ' by paired a/2 < 110 > in climb configurations at high temperature. The a/3 < 112 > stacking fault modes of shear are of secondary importance, except in primary creep at intermediate temperatures where the motion of superlattice intrinsic/extrinsic stacking fault pairs is rate controllingKeywords
This publication has 0 references indexed in Scilit: