Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 509, Issue 24, Pages 6838-6843Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.03.129
Keywords
AZ91D magnesium alloy; Uniaxial ratcheting; Cyclic tension; Fatigue life
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Funding
- Central South University
- Education Commission of Hunan Province, China
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Uniaxial ratcheting and low-cycle fatigue failure behaviors of hot-rolled AZ91D magnesium alloy were studied by uniaxial cyclic stress-controlling tension deformation experiments. The effects of stress amplitude, mean stress and stress rate on the uniaxial ratcheting response and fatigue life of the hot-rolled AZ91D magnesium alloy were analyzed. Results show that (1) the ratcheting strain and ratcheting strain rate of the hot-rolled AZ91D magnesium alloy both increase with the increase of stress amplitude or mean stress; (2) increasing stress rate will decrease the ratcheting strain and ratcheting strain rate of the hot-rolled AZ91D magnesium alloy; (3) the increase of stress amplitude and mean stress can both reduce the fatigue life of the hot-rolled AZ91D magnesium alloy, while the fatigue life will be prolonged with the increase of stress rate. (C) 2011 Elsevier B.V. All rights reserved.
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