CYCLIC PLASTIC BEHAVIOR AND FATGIUE LIFE OF AZ91 ALLOY IN AS-CAST AND ULTRAFINE-GRAINED STATE
<p>Fatigue properties of magnesium alloy AZ91 in as-cast and in ultrafine-grained state prepared by equal channel angular pressing were investigated. The fatigue strength in the low-cycle fatigue region was found to be substantially improved by the severe plastic deformation, whereas the impro...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Univerzity of Zilina. Faculty of Mechanical Engineering
2014-06-01
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| Series: | Materiálové Inžinierstvo |
| Subjects: | |
| Online Access: | http://ojs.mateng.sk/index.php/Mateng/article/view/143 |
| Summary: | <p>Fatigue properties of magnesium alloy AZ91 in as-cast and in ultrafine-grained state prepared by equal channel angular pressing were investigated. The fatigue strength in the low-cycle fatigue region was found to be substantially improved by the severe plastic deformation, whereas the improvement in the high-cycle fatigue region is negligible. The cyclic plastic response in both states is qualitatively similar; short initial softening is followed by a long cyclic hardening. The observed fatigue behavior was discussed in terms of specific microstructural features of both states and on the basis of cyclic slip localization and fatigue crack initiation.</p><p> </p> |
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| ISSN: | 1335-0803 1338-6174 |