|
|
|
| Correlation between microstructure and impact toughness of weld heat-affected zone in 5 wt.% manganese steels |
| Jun-hui Li1, Hong-hong Wang1, Qiang Luo1, Li Li2, Chao Sun2, R.D.K. Misra3 |
| 1 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China;
2 Research Institute of Nanjing Iron and Steel Co., Ltd., Nanjing 210035, Jiangsu, China;
3 Laboratory for Excellence in Advanced Steel Research, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, El Paso, TX 79968, USA |
|
|
|
|
Abstract The microstructure in welding heat-affected zones of 5 wt.% manganese steels was studied, and its effect on impact toughness was analyzed. The simulated coarse-grained heat-affected zone (CGHAZ) had the lowest impact toughness of ~39 J at - 40 °C because of coarse-grained structure and least volume fraction of retained austenite (RA) of 1.2 vol.%. The impact toughness of simulated intercritical heat-affected zone (ICHAZ) and fine-grained heat-affected zone (FGHAZ) were ~165 and ~45 J, respectively, at - 40 °C. The effective grain size of simulated FGHAZ was smaller than that of the simulated ICHAZ. Furthermore, microstructural investigation revealed that the simulated FGHAZ and ICHAZ had
similarity in volume fraction and stability of RA. However, tempered martensite was present in ICHAZ and absent in FGHAZ. It is proposed that the presence of tempered martensite contributed to good impact toughness in simulated ICHAZ.
|
|
Received: 02 March 2018
Published: 10 October 2018
|
|
|
|
| Cite this article: |
|
Jun-hui Li,Hong-hong Wang,Qiang Luo, et al. Correlation between microstructure and impact toughness of weld heat-affected zone in 5 wt.% manganese steels[J]. Journal of Iron and Steel Research International, 2019, 26(7): 761-770.
|
|
|
|
| [1] |
Tian-hai Wu, Jian-jun Wang, Hua-bing Li, Zhou-hua Jiang, Chun-ming Liu, Hong-yang Zhang. Effect of heat input on austenite microstructural evolution of simulated heat affected zone in 2205 duplex stainless steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(5): 435-441. |
| [2] |
Tong-bang An, Jin-shan Wei, Lin Zhao, Ji-guo Shan, Zhi-ling Tian. Influence of carbon content on microstructure and mechanical properties of 1000 MPa deposited metal by gas metal arc welding[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(5): 512-518. |
| [3] |
Cheng-hui Su · Qiang-guo Li · Xue-fei Huang · Wei-gang Huang. Effect of bainite microstructure during two-step quenching and partitioning process on strength and toughness properties of a 0.3%C bainitic steel[J]. , 2018, 25(2): 235-242. |
| [4] |
Hui Zheng, . Wei Li , . Yu Gong, . Li Wang . Xue-jun Jin,. Microstructure-based finite element modeling of effect of metastable austenite on mechanical properties of quenching and partitioning (Q&P) 980 steel[J]. , 2018, 25(11): 1140-1148. |
| [5] |
Ming-ming Song, ? Bo Song ? Sheng-hua Zhang ? Zhan-bing Yang ? Zheng-liang Xue, ? Sheng-qiang Song, ? Run-sheng Xu, ? Zhi-bo Tong. Effect of heat input on microstructure and toughness of rare earthcontained C–Mn steel[J]. , 2018, 25(10): 1033-1042. |
| [6] |
Tao Liu,? Mu-jun Long, ? Deng-fu Chen, ? Hua-mei Duan, ? Lin-tao Gui, ? Sheng Yu, ? Jun-sheng Cao, ? Hua-biao Chen, ? He-lin Fan,. Effect of coarse TiN inclusions and microstructure on impact toughness fluctuation in Ti micro-alloyed steel[J]. , 2018, 25(10): 1043-1053. |
|
|
|
|
2019, Vol. 26 
