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Effect of Cyclic Stress Reduction on the Creep Characteristics of AZ91 Magnesium Alloy
【文件类型】 【消费金额】2.7 【文章页数】9 【会员操作】  
【文章作者】Alaa Farag Abd El-Rehim;
【文章摘要】      The creep deformation behavior of aged AZ91 magnesium alloy under the cyclic stress reduction has been investigated in the temperature range 353–383 K. The microstructural evolution of the AZ91 magnesium alloy at different heat treatment conditions has been studied using optical microscopy and scanning electron microscopy. The minimum strain rate, e_min, was found to be higher under cyclic stress reduction condition than that under static creep condition for the same maximum stress. Cyclic creep acceleration is interpreted using the interaction of moving dislocations with the existing b-phase(Mg17Al12) precipitates. The mean value of the activation energy of secondary creep stage was found to be equal to that quoted for lattice self-diffusion of magnesium mechanism.
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【期刊】Acta Metallurgica Sinica(English Letters)【卷】【ISSUE】【ISSUEID】    【文章期份】2015    【发布日期】2016/1/8 0:00:00    点击率:1    打印    关闭
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