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利用欧拉角表示晶粒取向的Monte Carlo方法,模拟了异常晶粒长大过程.通过Voronoi模型产生了晶粒尺寸近似符合Lognrmal分布且具有立方织构的初始组织,比较了该组织中不同织构半峰宽和体积分数对晶粒长大过程的影响.模拟结果表明:随着半峰宽变大,异常晶粒长大可能性和平均晶粒尺寸都变大;织构体积分数对异常晶粒长大的影响相对较小,只在半峰宽较小且体积分数很大时,才抑制异常晶粒长大,模拟结果与实验吻合.另外,模拟组织中平均晶粒长大速度不仅受到晶界迁移率的影响,而且受到异常晶粒长大数量的影响.

参考文献

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