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OALib Journal期刊
ISSN: 2333-9721
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fe--ni机械合金化过程中马氏体的形成及相变
Keywords: 金属材料,马氏体,机械合金化,相变
Abstract:
？研究了ni含量、机械合金化工艺参数对fe--ni机械合金化过程中马氏体相变的影响及其机理.结果表明:在fe--ni机械合金化过程中存在着马氏体相变,但继续机械合金化马氏体是否会发生逆转变主要由ni含量决定.当ni$\leq$30\%(质量分数,下同)时,机械合金化引起的材料局部温度未达到形变促使马氏体相变逆转变开始温度,因此继续机械合金化马氏体不转变.对于fe--35ni,形变促使逆转变的开始温度低于局部温升,马氏体将向奥氏体转变.当ni含量为35\%时,随着机械合金化时间的延长、球磨速度和球料比的提高,机械合金化可以提供的相变驱动力增大导致奥氏体的量逐渐增多.
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