|
|
Tuning Cr-rich nanoprecipitation and heterogeneous structure in equiatomic CrFeNi medium-entropy stainless alloys |
Kai Wang1, Xue-jiao Wang1, Tuan-wei Zhang2, Xi Jin1, Hui-jun Yang1, Jun-wei Qiao1,3 |
1 College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
2 College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
3 State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
|
|
Abstract High-/medium-entropy stainless alloys (HESAs/MESAs) are a new kind of alloys with great potential to combine excellent properties from high-/medium-entropy alloys (HEAs/MEAs) and stainless steels. A CrFeNi MESA was chosen to investigate its microstructures and mechanical behaviors. After homogenization, the strength and ductility of CrFeNi MESAs with single-phase face-centered-cubic (fcc) structure were higher compared with those of Fe100-x–yCrxNiy austenitic stainless steels. Cr-rich body-centered-cubic (bcc) precipitates and heterogeneous structure were introduced by cold rolling and annealing at 800 °C. Rolling at 700 °C results in higher dislocation density and the occurrence of lamellar Cr-rich bcc precipitates. High-density dislocations and fcc grains with heterogeneous structure, together with Cr-rich bcc precipitates, contribute to a yield strength improvement of about 50 MPa, and appreciable tensile yield strength of ~ 540 MPa and fracture strain of ~ 20% are obtained. It reveals that not only compositional variations but also grain size and phase structure tuning can be utilized for achieving desired mechanical properties.
|
Received: 01 September 2020
Published: 25 March 2022
|
|
|
|
Cite this article: |
Kai Wang,Xue-jiao Wang,Tuan-wei Zhang, et al. Tuning Cr-rich nanoprecipitation and heterogeneous structure in equiatomic CrFeNi medium-entropy stainless alloys[J]. Journal of Iron and Steel Research International, 2022, 29(3): 529-536.
|
|
|
|
[1] |
Xin-pan Yu, Hui-bin Wu, Yang Gu, Rui Yuan, You-you Zhang, Yu-hui Feng. Effect of prior martensite on bainite transformation and microstructure of high-carbon nano-bainitic steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(4): 647-654. |
[2] |
Jian Han, Lian-meng Liu, Xin-ya Chen, Min-fang Chen, Lei Cui, Yang-chuan Cai, Yin-bao Tian. Comparison of feasibility, microstructure and performance of hybrid laser arc, activated flux tungsten inert gas and friction stir welding for thick plate of innovative ultra-pure ferritic stainless steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(4): 665-676. |
[3] |
Solomon-Oshioke Agbedor, Dong-hui Yang, Jing Cao, Jian-qing Chen, Bassiouny Saleh, Chao Qiu, Lei Wang, Jing-hua Jiang, Ai-bin Ma. Recent progress in porous Mg-based foam preparation approaches: effect of processing parameters on structure and mechanical property[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(3): 371-402. |
[4] |
Fan Zhao, Guo-ning He, Ya-zheng Liu, Zhi-hao Zhang, Jian-xin Xie. Effect of titanium microalloying on microstructure and mechanical properties of vanadium microalloyed steels for hot forging[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(2): 295-306. |
[5] |
Yong-gang Yang, Wang-zhong Mu, Xiao-qing Li, Hai-tao Jiang, Mai Wang, Zhen-li Mi, Xin-ping Mao. Effects of strain rate on austenite stability and mechanical properties in a 5Mn steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(2): 316-326. |
[6] |
Jian-lei Zhang, Cong-hui Hu, Yu-xiang Liu, Yang Yang, Gang Ji, Chang-jiang Song, Qi-jie Zhai. Precipitation strengthening of nano-scale TiC in a duplex low-density steel under near-rapid solidification[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2021, 28(9): 1141-1148. |
|
|
|
|