Strong and ductile medium Mn steel without transformation-induced plasticity effect
Strong and ductile medium Mn steel without transformation-induced plasticity effect
复制标题
无相变塑性效应的高韧性中锰钢
DOI：
10.1080/21663831.2018.1461141
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发表时间：
2018
影响因子：
8.3
通讯作者：
Huang M X
中科院分区：
文献类型：
--
作者：
He B B;Huang M X
中锰钢的传统合金设计是优化相变诱发塑性（TRIP）效应。本研究表明，双相非均质组织足以形成具有高屈服强度（~ 1.2 GPa）和大均匀伸长率（~ 14.5%）的中Mn钢。超高强度来源于高背应力，而大延性来源于应变梯度塑性和背应力硬化，两者都是双相非均质组织固有的。在塑性变形过程中，TRIP效应被抑制。因此，通过工程双相非均相组织，中锰钢可以在不借助于TRIP效应的情况下获得较强的韧性。影响声明我们证明了工程双相非均相组织可以使中Mn钢具有强韧性，而无需诉诸传统的相变诱导塑性（TRIP）效应。
The conventional alloy design of medium Mn steel is to optimize the transformation-induced plasticity (TRIP) effect. Here we show that a dual-phase heterogeneous structure is sufficient to develop a medium Mn steel with high yield strength (∼1.2 GPa) and large uniform elongation (∼14.5%). The ultra-high strength is contributed by high back-stress while the large ductility is induced by strain-gradient plasticity and back-stress hardening, both of which are inherent to dual-phase heterogeneous structure. TRIP effect is suppressed during plastic deformation. Therefore, medium Mn steel can be strong and ductile by engineering dual-phase heterogeneous structure without resorting to TRIP effect.IMPACT STATEMENTWe demonstrate that medium Mn steel can be strong and ductile by engineering dual-phase heterogeneous structure without resorting to the conventional transformation-induced plasticity (TRIP) effect.