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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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低碳钢形变诱导铁素体相变过程中碳的扩散行为
, PP. 930-934
Keywords: 针形变诱导铁素体相变,碳扩散,电子探
Abstract:
在Gleeble1500热模拟机上对低碳钢Q235进行了热压缩实验,用电子探针分析了热变形试样微观组织中的碳浓度分布.结果表明,形变诱导铁素体晶粒中的碳含量明显过饱和.这表明在形变诱导铁素体相变过程中,碳没有发生明显的从铁素体向奥氏体扩散.从热力学的角度分析,在高于奥氏体-铁素体平衡转变温度Ae3变形,变形存储能的作用最终降低了体系相变后的自由能,使得在形变诱导铁素体相变过程中,碳无需发生从铁素体向奥氏体的扩散.
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