CREEP IN A NICKEL-BASE 16CR-10W-4MO-TIAL HEAT-RESISTANT ALLOY

Citation
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
Citations number
22
Categorie Soggetti
Material Science
ISSN journal
09215093
Volume
165
Issue
2
Year of publication
1993
Pages
99 - 107
Database
ISI
SICI code
0921-5093(1993)165:2<99:CIAN1H>2.0.ZU;2-8
Abstract
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.