|
|
|
| Effect of hydrogen addition on compression deformation behaviour of Ti–0.3Mo–0.8Ni alloy argon-arc welded joints |
| Zhao-hui Zhang1, Quan-ming Liu1,2, Li Fu2, Hai-ying Yang3, Shi-feng Liu1 |
1 School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China
2 Shaanxi Key Laboratory of Friction Welding Technologies, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China
3 Institute of Titanium Alloy Research, Northwest Institute for Nonferrous Metal Research, Xi’an 710016, Shaanxi, China |
|
|
|
|
Abstract The effect of hydrogen addition on compression deformation behaviour of Ti–0.3Mo–0.8Ni alloy argon-arc welded joint has been investigated. Evolution mechanism of hydrogen-induced flow stress was discussed in detail. The results show that with increasing hydrogen content, the stretching and bending extent of fully lamellar microstructures including α lamellas and acicular hydride continued to increase, the morphology of dynamic recrystallization (DRX) grains tended to change from approximately equiaxed to large lamellar shape, and the quantity of DRX grains and recrystallization degree of grains increased obviously. A large number of dislocations concentrated in the vicinity of the hydride. Steady stress was decreased continuously with increasing hydrogen content, while peak stress of the hydrogenated 0.12 wt.% H weld zone was decreased to the minimum value and then increased slowly. A slight decrease in flow stress of the hydrogenated 0.05 wt.% H weld zone was caused by limited increase in the volume fraction of softer β phase. Hydrogen-induced DRX of α phase and improved dislocation movement by strong interaction between the hydride and dislocation directly resulted in a sharp drop in flow stress of the hydrogenated 0.12 and 0.21 wt.% H weld zone. Solute hydrogen also finitely contributed to a sharp drop in flow stress of the hydrogenated 0.12 and 0.21 wt.% H weld zone by promoted local softening, which induced continuous DRX and more movable dislocations to participate in slipping or climbing. The reinforcement effect and plastic deformation of the hydride and solution strengthening of β phase induced by solute hydrogen finally led to the increase in flow stress of the hydrogenated 0.21 wt.% H weld zone in its true strain range from 0 to 0.36.
|
|
Received: 18 February 2020
Published: 25 May 2021
|
|
|
|
| Cite this article: |
|
Zhao-hui Zhang,Quan-ming Liu,Li Fu, et al. Effect of hydrogen addition on compression deformation behaviour of Ti–0.3Mo–0.8Ni alloy argon-arc welded joints[J]. Journal of Iron and Steel Research International, 2021, 28(5): 621-628.
|
|
|
|
| [1] |
ZHANG Xin1,LI Sheng-li1,BIAN Shou-yuan1,YAN Ling2. Basic research on hot compression of EH40 ship plate steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(5): 423-428. |
| [2] |
LI Yu-feng1,2,TANG Xing-chang3,PAN Ji-xiang1,2,WANG Chang-bo1,2. Dynamic recrystallization behavior of 904L stainless steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(2): 159-165. |
| [3] |
ZHANG Nan,TIAN Zhi-ling,ZHANG Shu-ling,DONG Xian-chun,PAN Hui1,ZHANG Xi. Mechanism and solution of welding softening for 700MPa microalloyed high strength steel#br#[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(3): 318-326. |
| [4] |
YU Xinping，PAN Guangyong，QI Yongjie，HUANG Qinghua，PAN Qiaoyu. Dynamic recrystallization behavior of steel for 17Cr2Ni2Mo gears[J]. Iron and Steel, 2019, 54(11): 94-100. |
| [5] |
ZHOU Ji-feng. Flow stress and microstructure of the warm deformation of martensite microstructure in 45 steel[J]. , 2018, 36(3): 21-23. |
| [6] |
WANG Qing- juan,LI Xiang- jun,REN Yao- jia,ZHOU Hai- xiong. Effect of initial state on hot deformation behavior of 65 wire rod[J]. , 2018, 30(12): 998-1005. |
|
|
|
|
2021, Vol. 28 
