Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1576026 | Materials Science and Engineering: A | 2013 | 5 Pages |
Abstract
Microstructure evolution of the Al-12Si-CuNiMg alloy under high temperature low cycle fatigue was investigated with scanning and transmission electron microscopy. The alloy exhibits cyclic softening at diverse total strain amplitudes and loading temperatures. The material fatigue life obviously decreases with the increase of the strain amplitude at the same temperature. However, fatigue life increases and microstructure improves with temperature increase at the same strain amplitude. At certain loading temperatures and strain amplitudes, the microstructure can be refined. The fracture morphology changes gradually from brittle quasi-cleavage fracture, with numerous small cracks, to quasi-cleavage fracture with numerous small dimple gliding fractures.
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Authors
Jinxiang Liu, Qing Zhang, Zhengxing Zuo, Yi Xiong, Fengzhang Ren, Alex A. Volinsky,