Effects of boron on mechanical properties of a hot-rolled 13% Mn metastable austenitic steel
Effects of boron on mechanical properties of a hot-rolled 13% Mn metastable austenitic steel
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效果%20of%20硼%20on%20机械%20性能%20of%20a%20热轧%2013%%20Mn%20亚稳态%20奥氏体%20钢
DOI：
10.1016/j.matlet.2018.09.027
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发表时间：
2018-12
影响因子：
3
通讯作者：
Zhengzhi Zhao
中科院分区：
文献类型：
--
作者：
Cheng Li;Feng Li;Juhua Liang;Ronghua Cao;Zhengzhi Zhao
系统研究了B对13%Mn亚稳态奥氏体钢的组织、拉伸性能、断裂行为和相变的影响。B的加入提高了硬质硼化物的屈服强度，但由于脆性硼化物的断裂机制不同而降低了总延伸率。显微组织分析表明，合金优异的力学性能是相变诱发塑性(TRIP)和孪生诱发塑性(TWIP)效应共同作用的结果。同时，裂纹尖端高度集中的应力促使奥氏体相变为马氏体相变，消耗了大量的奥氏体相，导致断裂发生较早。
The effects of B on microstructure, tensile properties, fracture behavior and phase transformation in 13% Mn metastable austenitic steels were systemically investigated. B addition increased the yield strength for the existence of hard borides, but reduced the total elongation because of different fracture mechanisms caused by the brittle borides. Microstructural analysis indicated that the excellent mechanical properties were the results of the combination of transformation induced plasticity (TRIP) and twinning induced plasticity (TWIP) effects. Meanwhile, the highly concentrated stress at the ends of cracked borides induced the transformation from austenite to martensite and a large amount of austenite were consumed by this way, which led to the earlier occurrence of fracture.
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DOI：
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