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

doi:10.1016/j.msea.2012.03.060

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 journal › Article › peer-review

32 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 language	English
Pages (from-to)	239-247
Number of pages	9
Journal	Materials Science and Engineering A
Volume	546
DOIs	https://doi.org/10.1016/j.msea.2012.03.060
Publication status	Published - 1 Jun 2012
Externally published	Yes

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

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@article{95bfa6554de24e2e880e2b30fbdf19e9,

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

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.",

keywords = "Creep, In-situ, Intergranular cracking, Long period stacking ordered (LPSO), Mg-RE alloy",

author = "Yin, {D. D.} and Wang, {Q. D.} and Boehlert, {C. J.} and V. Janik and Y. Gao and Ding, {W. J.}",

year = "2012",

month = jun,

day = "1",

doi = "10.1016/j.msea.2012.03.060",

language = "English",

volume = "546",

pages = "239--247",

journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

issn = "0921-5093",

publisher = "Elsevier",

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TY - JOUR

T1 - Creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) at 573K

AU - Yin, D. D.

AU - Wang, Q. D.

AU - Boehlert, C. J.

AU - Janik, V.

AU - Gao, Y.

AU - Ding, W. J.

PY - 2012/6/1

Y1 - 2012/6/1

N2 - 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.

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.

KW - Creep

KW - In-situ

KW - Intergranular cracking

KW - Long period stacking ordered (LPSO)

KW - Mg-RE alloy

U2 - 10.1016/j.msea.2012.03.060

DO - 10.1016/j.msea.2012.03.060

M3 - Article

AN - SCOPUS:84860115039

VL - 546

SP - 239

EP - 247

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

ER -