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Creep behavior of Mg–11Y–5Gd–2Zn–0.5Zr (wt.%) at 573K
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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. doi:10.1016/j.msea.2012.03.060 ISSN 0921-5093.
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Official URL: http://dx.doi.org/10.1016/j.msea.2012.03.060
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 | ||||
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Subjects: | T Technology > TN Mining engineering. Metallurgy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > 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 | ||||
Official Date: | June 2012 | ||||
Dates: |
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Volume: | Vol.546 | ||||
Number: | No.1 | ||||
Page Range: | pp. 239-247 | ||||
DOI: | 10.1016/j.msea.2012.03.060 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 21 December 2015 |
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