Excess Carbon Enrichment in Austenite During Intercritical Annealing

Excess Carbon Enrichment in Austenite During Intercritical Annealing
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临界退火过程中奥氏体中碳过量富集

DOI:
10.1007/s11661-013-1973-7
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发表时间:
2013-09
期刊:
Metallurgical and Materials ...
影响因子:
--
通讯作者:
T Furuhara
T Furuhara
中科院分区:
其他
文献类型:
--
作者:
ZQ Liu;G Miyamoto;ZG Yang;T Furuhara

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用电子探针显微分析仪和三维原子探针显微镜研究了Fe-2 Mn-0.3C和Fe-0.35C合金在亚温退火过程中马氏体转变奥氏体中碳的富集。在早期阶段的转变,可以忽略不计的锰分配发生,奥氏体中的碳含量高于正交平衡和准平衡的预测。这可能是由于有限的固有界面迁移率和/或溶质拖曳效应。计算了界面自由能耗散。
Carbon enrichment in the austenite transformed from martensite during intercritical annealing was measured by electron probe microanalyzer and three-dimensional atom probe microscopy in Fe-2Mn-0.3C and Fe-0.35C alloys. At early stages of the transformation, negligible Mn partitioning occurs, and carbon content in austenite is higher than orthoequilibrium and paraequilibrium predictions. This is presumably attributed to finite intrinsic interface mobility and/or solute drag effect. The resultant free energy dissipation at interface was estimated.
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