|
|
High-temperature deformation behaviour of duplex stainless steel with hard boronised layer |
N.M. Sultan1, I. Jauhari1, R. Saidan1, M.F.M. Sabri1 |
1 Department of Mechanical Engineering, Faculty of Engineering, University Malaya, Kuala Lumpur 50603, Malaysia |
|
|
Guide |
|
Abstract In order to understand the high-temperature deformation behaviour of alloy having hard surface layer, thermo-mechanically treated duplex stainless steel (DSS) is boronised for 0.75–6 h at 1223 K and subsequently deformed under compression mode at the same temperature under strain rate condition of 1 × 10-3, 2 × 10-4 and 6 × 10-5 s-1 until strain of 0.4. The substrate microstructure is almost isotropic with grain size after boronising with layer thickness between 1.61 and 2.74 μm. X-ray diffraction results confirm the formation of boride on DSS surface. The surface hardness of DSS increases from 387 to 1000–2400 HV after boronising. Uniform boronised layer with thickness of 20–40 μm is formed at DSS surface. Compression results show that the flow stress of the deformation increases with the strain rate and boronising time. For the boronised samples, the flow stress range is between 5 and 89 MPa. To determine the actual effect of the boronised layer on the flow stress, the results are also compared with those from un-boronised samples having similar microstructure. The results suggest that at a constant grain size, even with the hardest layer, the effect of hard surface layer on the flow stress almost could be negligible when the deformation rate is slow, but at faster deformation rate, even in the layer with the least hardness, the flow stress shows a significant increase. It is also observed that the hard boride surface disintegration could be avoided at a sufficiently low deformation flow stress that could be attributed to superplasticity.
|
Received: 03 December 2019
Published: 25 February 2021
|
|
|
|
|
Cite this article: |
N.M. Sultan,I. Jauhari,R. Saidan, et al. High-temperature deformation behaviour of duplex stainless steel with hard boronised layer[J]. Journal of Iron and Steel Research International, 2021, 28(2): 244-253.
|
|
|
|
[1] |
Wei-jian Chen, Peng-fei Gao, Shuai Wang, Hong-zhou Lu, Zheng-zhi Zhao. Effect of vanadium on hydrogen embrittlement susceptibility of high-strength hot-stamped steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2021, 28(2): 211-222. |
[2] |
ZHANG Xinyao,ZHA Xiaoqin,REN Yongfeng,ZHANG Wenli,. Microstructure and properties analysis of composite[J]. PHYSICS EXAMINATION AND TESTING, 2021, 39(1): 1-. |
[3] |
WU Min, LI Guo-ping, ZOU Yong, WANG Li-xin, WEI Ying-hui. Effect of annealing temperature on microstructure and properties of ferritic stainless steel 441[J]. Iron and Steel, 2021, 56(1): 97-103. |
[4] |
CHEN Xingrun,PAN Jixiang,JI Xianbin,QIAN Zhangxin,WU Xiaoqiang. Analysis of oxide scales microstructure of hot-rolled plate in S32101 duplex stainless steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2021, 33(1): 84-90. |
[5] |
LIU Si-han, WANG Cun-yu, XU Hai-feng, CAO Wen-quan. Superplasticity and microstructure evaluation of cold rolled medium manganese steels[J]. Iron and Steel, 2020, 55(9): 97-103. |
[6] |
NIU Yan-long, LIU Qing-you, JIA Shu-jun, TONG Shuai, WANG Bing, REN Yi. Influence of microstructure and M/A island evolution on toughness of pipeline steel under controlled cooling process[J]. Iron and Steel, 2020, 55(6): 91-100. |
|
|
|
|