A NEW METHOD FOR ACTIVATION VOLUME MEASUREMENTS - APPLICATION TO NI3(AL,HF)

Authors
SPATIG P BONNEVILLE J MARTIN JL
Citation
P. Spatig et al., A NEW METHOD FOR ACTIVATION VOLUME MEASUREMENTS - APPLICATION TO NI3(AL,HF), Materials science & engineering. A, Structural materials: properties, microstructure and processing, 167(1-2), 1993, pp. 73-79
Citations number
23
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
167
Issue
1-2
Year of publication
1993
Pages
73 - 79
Database
ISI
SICI code
0921-5093(1993)167:1-2<73:ANMFAV>2.0.ZU;2-Y
Abstract
A new method is presented that allows the measurement of microscopic a ctivation volumes which are typical of thermally activated dislocation processes. It consists of a repeated relaxation test with constant du rations, which start at a given stress level. The advantages of this m ethod, as compared to a previous one which uses constant stress drops, are outlined. The new method is successfully applied to the determina tion of the transition stress between micro- and macro-plastic deforma tion in the alloy Ni3(Al,Hf) at room temperature.