| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1575252 | Materials Science and Engineering: A | 2014 | 8 Pages |
Abstract
High cycle fatigue behavior of casting Mg96.34Gd2.5Zn1Zr0.16 alloy was investigated for its improvement by heat-treatment. After solution treatment (T4, 10Â h@773Â K) or solution treatment plus artificial aging (T6, 10Â h@773Â K+128Â h@473Â K), fatigue strength of this alloy was found to be enhanced. The T6-treated alloy achieved the highest fatigue strength, 130Â MPa, being 25Â MPa and 18Â MPa greater than those of the as-cast and T4-treated alloy, respectively. The average fatigue life of the heat-treated alloys is longer than that of the as-cast alloy a given stress amplitude. For the distribution of fatigue life, a fatigue life gap spanned from 105 to 107 can be observed in the as-cast and T4-treated alloy. Such a gap is absent after the alloy received artificial aging. The mechanism for the high cycle fatigue behavior of the casting alloy after heat-treatment was also discussed.
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Authors
Zongling He, Liming Peng, Penghuai Fu, Yingxin Wang, Xiaoyu Hu, Wenjiang Ding,