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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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AZ31镁合金蠕变初期的变形特征
, PP. 375-379
Keywords: AZ31镁合金,蠕变,位错
Abstract:
通过蠕变曲线的测定和TEM的形貌观察,研究了AZ31镁合金在蠕变初期的变形特征及组织演化规律.结果表明,蠕变初期的变形特征是大量形变产生的？a？位错在合金的基面和非基面滑移，？a＋c？位错在锥面滑移。其中？a？位错通过位错分解反应可由一非基面交滑移至另一非基面。随蠕变进行,高密度的形变位错发生动态回复，可进一步束集形成位错胞和位错墙。蠕变初始阶段,在应力的作用下，适当取向的晶体发生孪生，并作为一种附加的变形机制而改善合金的韧性。
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