Yin, D. D., Wang, Q. D., Boehlert, C. J., Janik, Vit, Gao, Y. and Ding, W. J.. (2012) Creep behavior of Mg–11Y–5Gd–2Zn–0.5Zr (wt.%) at 573K. Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing, Vol.546 (No.1). pp. 239-247. ISSN 0921-5093

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Abstract

The effect of microstructure on the tensile-creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) (WGZ1152) at 573K (0.64T m) and stresses between 30MPa and 140MPa was investigated. The minimum creep rate of the peak-aged (T6) alloy was almost two orders of magnitude lower than that for a WE54-T6 (Mg-5.2Y-3.6RE-0.5Zr (wt.%)) alloy. The peak-aged condition (T6) exhibited slightly greater creep resistance than the as-cast condition. The solution treated (T4) material exhibited the lowest creep resistance. The creep stress exponent (∼5) suggested that dislocation creep was the dominant secondary creep mechanism. The minimum creep rate and time-to-fracture could be described by the Monkman-Grant equation. An in-situ creep experiment indicated that intergranular cracking was prevalent in the tertiary creep regime and the crack propagation path tended to follow the grain boundaries.

Item Type:	Journal Article
Subjects:	T Technology > TN Mining engineering. Metallurgy
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
Publisher:	Elsevier SA
ISSN:	0921-5093
Date:	June 2012
Volume:	Vol.546
Number:	No.1
Page Range:	pp. 239-247
Identification Number:	10.1016/j.msea.2012.03.060
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/46944

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