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 | |
| Publication status | Published - 1 Jun 2012 |
| Externally published | Yes |
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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 journal › Article
}
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
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 -