Microstructure Refinement by Low-Temperature Ausforming in an Fe-Based Metastable High-Entropy Alloy
Microstructure Refinement by Low-Temperature Ausforming in an Fe-Based Metastable High-Entropy Alloy
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DOI：
10.3390/met11050742
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发表时间：
2021-04
期刊：
影响因子：
2.9
通讯作者：
M. Koyama;Takeaki Gondo;K. Tsuzaki
中科院分区：
文献类型：
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作者：
M. Koyama;Takeaki Gondo;K. Tsuzaki
研究了 Fe30Mn10Cr10Co 高熵合金的奥氏体成形对显微组织、硬度和塑性各向异性的影响。该合金在固溶处理条件下呈现出由面心立方（FCC）奥氏体和六方密排（HCP）马氏体组成的双相组织，逆相变结束温度低于200℃。因此，实现了200℃的低温奥氏体成形，从而细化了微观结构并显着提高了硬度。此外，塑性各向异性是 HCP 结构中的一个常见问题，通过奥氏成形处理得到了抑制。这反过来又减少了硬度的分散。
The effects of ausforming in an Fe30Mn10Cr10Co high-entropy alloy on the microstructure, hardness, and plastic anisotropy were investigated. The alloy showed a dual-phase microstructure consisting of face-centered cubic (FCC) austenite and hexagonal close-packed (HCP) martensite in the as-solution-treated condition, and the finish temperature for the reverse transformation was below 200 °C. Therefore, low-temperature ausforming at 200 °C was achieved, which resulted in microstructure refinement and significantly increased the hardness. Furthermore, plasticity anisotropy, a common problem in HCP structures, was suppressed by the ausforming treatment. This, in turn, reduced the scatter of the hardness.