M. Pahutova et al., CREEP IN A NICKEL-BASE 16CR-10W-4MO-TIAL HEAT-RESISTANT ALLOY, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 165(2), 1993, pp. 99-107
Creep in a nickel base 16Cr-10W-4Mo-TiAl heat resistant alloy has been
investigated in a broad region of temperatures and applied stresses w
ith the aim of identifying dislocation mechanisms that control creep r
ate at various external conditions. The results such as applied stress
and temperature dependence of steady state creep rate, measured inter
nal stress in addition to dislocation density are presented. Published
results of structure investigation both prior to as well as after cre
ep are summarized. An attempt is made to describe the creep in the all
oy in terms of the back stress, assuming lattice diffusion as the cree
p rate controlling process. It is shown that under proper assumptions,
the back stress concept leads to acceptable results although it provi
des an essentially phenomenological interpretation of creep. The possi
ble physical nature of the back stress in creep and/or possible creep
rate controlling mechanisms are briefly discussed.