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首页> 外文期刊>Journal of Residuals Science & Technology >Thermal Cycling Behavior of Mg-4%Sn-2.5%Pb Alloy
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Thermal Cycling Behavior of Mg-4%Sn-2.5%Pb Alloy

机译：Mg-4％Sn-2.5％Pb合金的热循环行为

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In the thermal cycle processing of Mg-4%Sn-2.5%Pb alloy, the hysteresis loop of first time was much narrower than the later and hysteresis loops of the later showed good repeatability. Microstructure of the material changed the largest and dimensional stability of the material is the best after the first thermal cycle. The precipitated phase Mg2Sn increased significantly after thermal cycle processing. Mg2Sn phase precipitated to the grain boundary in the warming stage and to the grain interior in the cooling stage. The rate of precipitation in the warming stage was faster than the rate of diffusion in the cooling stage. The rate of Mg2Sn phase precipitated in the grain boundary and diffused in the grain interior were fast. And founding that precipitation and stability of the material had a direct relationship. The more precipitated phase，the smaller coefficient of the thermal expansion.
机译：在Mg-4％Sn-2.5％Pb合金的热循环加工中，第一次的磁滞回线比后面的要窄得多，而后面的磁滞回线显示出良好的可重复性。在第一次热循环后，材料的微观结构变化最大，尺寸稳定性最佳。热循环处理后，析出相Mg2Sn显着增加。 Mg2Sn相在升温阶段沉淀到晶界，在冷却阶段沉淀到晶粒内部。升温阶段的沉淀速率快于冷却阶段的扩散速率。 Mg2Sn相在晶界沉淀并在晶粒内部扩散的速率很快。并发现沉淀与材料的稳定性有直接关系。析出相越多，热膨胀系数越小。

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