Supper strong nanostructured TWIP steels for automotive applications

Supper strong nanostructured TWIP steels for automotive applications
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适用于汽车应用的超强纳米结构 TWIP 钢

DOI:
10.1016/j.pnsc.2014.01.004
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发表时间:
2014-02
期刊:
Progress inNaturalScience:MaterialsInternational
影响因子:
--
通讯作者:
M.X. Huang
M.X. Huang
中科院分区:
其他
文献类型:
--
作者:
G.W. Yuan;M.X. Huang

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采用冷轧和回复处理工艺制备了一种韧性超强的纳米孪晶诱发塑性钢。这种强韧的纳米结构合金可用于白色车身的防侵入部件。采用冷轧工艺制备出密集的纳米孪晶,使显微组织得到细化。回复是用来退火位错,以提高塑性。提出了一个描述屈服应力与孪晶密度关系的物理模型。此外,本工作还发现,恢复的激活能约为160 J/mol,这意味着恢复机制是由位错芯扩散。
A ductile and super strong nanostructured twinning-induced plasticity (TWIP) steels were fabricated by cold rolling and recovery treatment. This strong and ductile nanostructured alloy can be used for the anti-intrusion part of body-in-white. Cold rolling was used to produce intensive nano-twins so that the microstructure was greatly refined. Recovery is employed to anneal dislocations for improving the ductility. A physical model is proposed to describe the relationship between the yield stress and the twin density. Furthermore, the present work also found that the activation energy for recovery is ~160 J/mol, which implies that the recovery mechanism is governed by dislocation core diffusion.
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