Creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) at 573K

D. D. Yin, Q. D. Wang, C. J. Boehlert, V. Janik, Y. Gao, W. J. Ding

Research output: Contribution to journalArticle

25 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)239-247
Number of pages9
JournalMaterials Science and Engineering A
Volume546
DOIs
Publication statusPublished - 1 Jun 2012
Externally publishedYes

Fingerprint

creep strength
Creep
tensile creep
crack propagation
casts
grain boundaries
exponents
microstructure
Creep resistance
Crack propagation
Grain boundaries
Microstructure

Keywords

  • Creep
  • In-situ
  • Intergranular cracking
  • Long period stacking ordered (LPSO)
  • Mg-RE alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) at 573K. / Yin, D. D.; Wang, Q. D.; Boehlert, C. J.; Janik, V.; Gao, Y.; Ding, W. J.

In: Materials Science and Engineering A, Vol. 546, 01.06.2012, p. 239-247.

Research output: Contribution to journalArticle

Yin, D. D. ; Wang, Q. D. ; Boehlert, C. J. ; Janik, V. ; Gao, Y. ; Ding, W. J. / Creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) at 573K. In: Materials Science and Engineering A. 2012 ; Vol. 546. pp. 239-247.
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AU - Janik, V.

AU - Gao, Y.

AU - Ding, W. J.

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AB - 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.

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