Microstructures, mechanical properties and deformation of near-rapidly solidified low-density Fe-20Mn-9Al-1.2C-xCr steels
Microstructures, mechanical properties and deformation of near-rapidly solidified low-density Fe-20Mn-9Al-1.2C-xCr steels
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近快速凝固低密度Fe-20Mn-9Al-1.2C-xCr钢的显微组织、力学性能和变形
DOI：
10.1016/j.matdes.2019.108307
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发表时间：
2020-01
影响因子：
8.4
通讯作者：
Qijie Zhai
中科院分区：
文献类型：
--
作者：
Jianlei Zhang;Conghui Hu;Yunhu Zhang;Jiehua Li;Changjiang Song;Qijie Zhai
研究了Cr对近快速凝固低密度Fe-20 Mn-9Al-1.2C（wt. %）的钢带。结果表明，Cr的加入增加了低密度钢带中δ铁素体的体积分数和尺寸，减少了κ碳化物的析出。近快速凝固钢带的屈服强度显著降低，但抗拉强度和总延伸率变化不明显。然而，冷轧后20%的压下量，屈服强度和极限抗拉强度的含铬钢带显着高于无铬钢带。这是由于Cr的加入减少了κ型碳化物的数量，促进了冷轧变形过程中高密度滑移带的形成。研究了冷轧3Cr（wt. %）钢带的拉伸强度分别为1270 MPa和21%。结果表明，低密度钢带的应变硬化行为存在滑移带和微带的双重硬化机制，纳米级κ-碳化物的数量对应变早期的硬化速率起着决定性的作用。
The effects of Cr addition on microstructures, mechanical properties and deformation behavior of near-rapidly solidified low-density Fe-20Mn-9Al-1.2C (wt. %) steel strips were investigated. It was found that Cr addition increased the volume fraction and size of δ-ferrite, and decreased the precipitation of κ-carbides in this low-density steel strip. The yield strength of the near-rapidly solidified steel strips was decreased significantly, but the ultimate tensile strength and the total elongation didn't obviously change. However, after cold rolling with 20% reduction, the yield strength and ultimate tensile strength of Cr-containing steel strips were significantly higher than that of the Cr-free steel strip. It was attributed to the fact that the decrease of κ-carbides caused by Cr addition facilitated the formation of high-density slip bands during cold rolling deformation. The ultimate tensile strength and total elongation of cold-rolled 3Cr (wt. %) steel strip were 1270 MPa and 21%, respectively. A double (Slip-band and Microband) hardening mechanism was proposed for the strain hardening behavior of the low-density steel strips, and the number of nanoscale κ-carbides played a crucial role in the strain hardening rate at the early strain stage.
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影响因子：
9.4
作者：
E. Welsch;D. Ponge;S. M. H. Haghighat;S. Sandlöbes;P. Choi;M. Herbig;S. Zaefferer;D. Raabe
通讯作者：
E. Welsch;D. Ponge;S. M. H. Haghighat;S. Sandlöbes;P. Choi;M. Herbig;S. Zaefferer;D. Raabe
影响因子：
5.5
作者：
Kim H;Suh DW;Kim NJ
通讯作者：
Kim NJ
影响因子：
2.5
作者：
W. He;Bi-lei Wang;Yang Yang-Yang;Yunhu Zhang;L. Duan;Zhiping Luo;C. Song;Q. Zhai
通讯作者：
W. He;Bi-lei Wang;Yang Yang-Yang;Yunhu Zhang;L. Duan;Zhiping Luo;C. Song;Q. Zhai
影响因子：
1.8
作者：
I. Gutierrez-Urrutia;D. Raabe
通讯作者：
I. Gutierrez-Urrutia;D. Raabe
DOI：
10.1016/j.msea.2013.07.094
发表时间：
2013-12
影响因子：
6.4
作者：
M. C. Ha;J. Koo;Jae-Kon Lee;Si Woo Hwang;Kyung-Tae Park
通讯作者：
M. C. Ha;J. Koo;Jae-Kon Lee;Si Woo Hwang;Kyung-Tae Park