Work-hardening rates during the high temperature creep of magnesium determined from the instantaneous strain on sudden stress changes

Northwood D.O., Daly K.E. and Smith I.O. (1985) Work-hardening rates during the high temperature creep of magnesium determined from the instantaneous strain on sudden stress changes. Materials Science and Engineering, 72 1: 51-63. doi:10.1016/0025-5416(85)90066-7


Author Northwood D.O.
Daly K.E.
Smith I.O.
Title Work-hardening rates during the high temperature creep of magnesium determined from the instantaneous strain on sudden stress changes
Journal name Materials Science and Engineering
ISSN 0025-5416
Publication date 1985-01-01
Sub-type Article (original research)
DOI 10.1016/0025-5416(85)90066-7
Open Access Status
Volume 72
Issue 1
Start page 51
End page 63
Total pages 13
Subject 2200 Engineering
Abstract Work-hardening rates during the steady state creep of polycrystalline magnesium at 100, 200 and 300°C have been determined from the instantaneous strains on a sudden increase and a sudden decrease in the creep stress. The work-hardening rate h varied from 0.45 to 1.22 times the value for Young's modulus and decreased with increasing creep stress or increasing temperature. Such work-hardening rates are of the same order of magnitude as those previously published for f.c.c., b.c.c. and h.c.p. metals and alloys. The stress exponent n of steady state creep of 3.70-4.65 indicates recovery (climb-controlled) creep. Climb-controlled creep in a dislocation substructure containing intracrystalline barriers, e.g. subgrain boundaries, is also indicated by the measured value of the stress exponent m of recovery of about 4.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 12 Jul 2016, 11:33:48 EST by System User