Deformation Behavior of High-manganese TWIP Steels Produced by Twin-roll Strip Casting

Deformation Behavior of High-manganese TWIP Steels Produced by Twin-roll Strip Casting
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双辊薄带连铸高锰TWIP钢的变形行为

DOI:
10.1016/j.proeng.2014.10.186
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发表时间:
2014
期刊:
Procedia Engineering
影响因子:
--
通讯作者:
G. Hirt
G. Hirt
中科院分区:
--
文献类型:
--
作者:
M. Daamen;W. Nessen;S. Richter;A. Schwedt;M. Beigmohamadi;G. Hirt

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双辊带钢铸造是生产高锰钢的一种有前途的替代方法。本研究为Fe-17Mn-0.6C-1.5Al TWIP钢的生产和进一步加工提供了机会。随着工艺链的增加,冷带材的力学性能逐渐提高,当对数应变为0.5时,冷带材的真应力为σ = 1500 MPa。结合EPMA和EBSD测量可以分析具有明显微偏析的非均匀铸态组织对孪晶行为的影响。结果表明,孪晶开始于元素浓度较低的区域,因此局部层错能较低。此外,仅在微米尺度上存在偏析的铸态组织对冷带再结晶后的力学性能没有负面影响。
Twin-roll strip casting represents a promising alternative for the production of high manganese steels. The present work demonstrates the opportunities for the production and further processing of a Fe-17Mn-0.6C-1.5Al TWIP steel. The mechanical properties are increased along the process chain and the cold strip exhibits a true stress of σ = 1500 MPa at a logarithmic strain of ɛ = 0.5. Combined EPMA and EBSD measurements allow for analyzing the influence of the inhomogeneous as-cast structure with pronounced microsegregations on twinning behavior. It was shown that twinning starts in the areas with a lower element concentration and thus with a lower local stacking fault energy. In addition, the fine as-cast structure with segregations only on the micron-scale has no negative influence on the resulting mechanical properties in the recrystallized cold strip.
DOI: 10.4028/www.scientific.net/kem.554-557.553
发表时间: 2013-06
期刊: Key Engineering Materials
影响因子: --
作者:
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通讯作者: M. Daamen;S. Richter;G. Hirt
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影响因子: 4.1
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