Molecular dynamics simulations are used to study the effects of tensile loading on nucleation and subsequent growth of bcc phase in pure fcc iron. The results show that orientation variant selection occurs during the stress-induced fcc-to-bcc transformation, which leads to the coalescence of neighbouring bcc platelets with identical orientation. The bcc phase nucleates mainly following Nishiyama–Wassermann and Kurdjumov–Sachs orientation relationships with the parent fcc phase. The present simulations contribute to a better understanding of mechanisms controlling mechanically induced martensitic transformation as well as coalescence of bcc platelets in steels.

中文翻译：

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通过原子模拟在铁微晶单轴拉伸下马氏体的聚结

分子动力学模拟用于研究拉伸载荷对纯 fcc 铁中 bcc 相成核和随后生长的影响。结果表明，取向变体选择发生在应力诱导的 fcc 到 bcc 的转变过程中，这导致具有相同取向的相邻 bcc 小片的聚结。bcc 相主要遵循 Nishiyama-Wassermann 和 Kurdjumov-Sachs 取向关系与母体 fcc 相成核。目前的模拟有助于更好地理解控制机械诱导马氏体转变以及钢中 bcc 片晶聚结的机制。