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MnS粒子对Fe-3%Si合金晶界迁移的影响 被引量:2

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摘要 统计观察了热变形Fe-3%Si合金中MnS粒子在900℃的析出行为,并利用过饱和固溶体中第二相粒子析出模型计算了MnS粒子的位错析出与晶界析出的相对关系;观察和计算都表明,MnS析出以位错形核为主.在二次再结晶过程中,晶界上MnS析出粒子的粗化过程决定了晶界的可迁移性;但在晶粒尺寸效应之外,晶界两侧晶粒内位错析出MnS粒子密度的差异对晶界迁移的方向也发挥了决定性作用.观察发现,迁移晶界两侧晶粒内往往显示出不同的MnS粒子密度,而晶界则倾向于向粒子密度较低的一侧迁移.不同取向晶粒内的位错密度等因素会影响到析出粒子的密度,高粒子密度的Goss取向晶粒易于长大.
出处 《科学通报》 EI CAS CSCD 北大核心 2009年第21期3404-3406,共3页 Chinese Science Bulletin
基金 国家自然科学基金资助项目(批准号:50871015)
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参考文献8

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同被引文献26

  • 1张继祥,关小军.异常晶粒长大的Monte Carlo模拟[J].中国有色金属学报,2006,16(10):1689-1697. 被引量:11
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