1 Faculty of Mechanical and Material Engineering, Huaiyin Institute of Technology, Huaian 223003, Jiangsu, China 2 Jiangsu Key Laboratory of Advanced Manufacturing Technology, Huaiyin Institute of Technology, Huaian 223003, Jiangsu, China 3 Institute for Special Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China
Effect of removing Al and Ti elements on peak flow stress of nickelbased heat-resistant alloy 617
1 Faculty of Mechanical and Material Engineering, Huaiyin Institute of Technology, Huaian 223003, Jiangsu, China 2 Jiangsu Key Laboratory of Advanced Manufacturing Technology, Huaiyin Institute of Technology, Huaian 223003, Jiangsu, China 3 Institute for Special Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China
摘要 The hot deformation behavior and the microstructure characteristics of alloy 617 and alloy C-HRA-2 were compared and analyzed. The removal of Al and Ti elements has a significant change in the hot deformation of the alloy, and there are two opposite effects on the flow stress before and after recrystallization. The results show that the removal of Al and Ti elements increases the flow stress of the alloy under high temperature or low strain rate deformation conditions. This is mainly due to the increase in the stacking fault energy of the alloy so that the alloy contains a higher twin boundary fraction after dynamic recrystallization (DRX). However, before DRX occurs, that is, at low temperature and high strain rate, the flow stress of this alloy is relatively reduced. This is due to the reduction in Peierls–Nabarro stress, making the alloy more prone to dislocation slip.
Abstract：The hot deformation behavior and the microstructure characteristics of alloy 617 and alloy C-HRA-2 were compared and analyzed. The removal of Al and Ti elements has a significant change in the hot deformation of the alloy, and there are two opposite effects on the flow stress before and after recrystallization. The results show that the removal of Al and Ti elements increases the flow stress of the alloy under high temperature or low strain rate deformation conditions. This is mainly due to the increase in the stacking fault energy of the alloy so that the alloy contains a higher twin boundary fraction after dynamic recrystallization (DRX). However, before DRX occurs, that is, at low temperature and high strain rate, the flow stress of this alloy is relatively reduced. This is due to the reduction in Peierls–Nabarro stress, making the alloy more prone to dislocation slip.
Chen Dong,Zheng-zong Chen,Zheng-dong Liu, et al. Effect of removing Al and Ti elements on peak flow stress of nickelbased heat-resistant alloy 617[J]. Journal of Iron and Steel Research International, 2023, 30(02): 384-391.
2023, Vol. 30 
