Premature Fracture Mechanism in an Fe-Mn-C Austenitic Steel
Premature Fracture Mechanism in an Fe-Mn-C Austenitic Steel
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DOI：
10.1007/s11661-012-1220-7
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发表时间：
2012-05
期刊：
影响因子：
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通讯作者：
M. Koyama;T. Sawaguchi;K. Tsuzaki
中科院分区：
文献类型：
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作者：
M. Koyama;T. Sawaguchi;K. Tsuzaki
我们研究了在特定条件下奥氏体Fe-Mn-C钢塑性差的原因。对Fe-17Mn-0.3C钢进行了273 K、294 K、323 K、373 K、423 K、473 K和523 K（0°C、21°C、50°C、100°C、150°C、200°C和250°C）的拉伸试验。采用光学显微镜、原子力显微镜、扫描电镜和x射线衍射法进行了显微结构观察。ε-马氏体相变是造成延展性差的主要原因。裂纹起源于退火孪晶界，并与ε-马氏体相互作用。
We investigated the cause for poor ductility in austenitic Fe-Mn-C steels under a specific condition. Tensile tests were performed on an Fe-17Mn-0.3C steel at 273 K, 294 K, 323 K, 373 K, 423 K, 473 K, and 523 K (0 °C, 21 °C, 50 °C, 100 °C, 150 °C, 200 °C, and 250 °C). Microstructural observations were conducted by optical microscopy, atomic force microscopy, scanning electron microscopy and the X-ray diffraction method.ε-martensitic transformation was concluded to be the major cause for the poor ductility. The cracks were initiated from the annealing twin boundaries that interacted with theε-martensite.