|
|
Orientational growth behavior and mechanism of delta (δ) phase precipitation in cold-rolled Inconel 718 alloy during heat treatment |
Neng-yong Ye1, Guang-liang Zhang1, Tian-yue Huang1, Ming Cheng2, Shi-hong Zhang2, Lei Wang1 |
1 School of Materials Science & Engineering, Taizhou University, Taizhou 318000, Zhejiang, China
2 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China |
|
|
Abstract Due to the important role of δ phase’s quantity and morphology in the mechanical and fatigue properties of Inconel 718 alloy and its components, it is necessary to renew insights into the effect of cold deformation on the δ phase precipitation, especially on the morphology evolution. Therefore, the nucleation and growth behavior of δ phase in cold-rolled Inconel 718 alloy during aging were investigated. The results show that the precipitation rate and volume fraction of δ phase increase with increasing the cold rolling reduction from 10% to 50%. The volume fraction of δ phase reaches equilibrium after 5 h, remaining at 5.98%, 6.52%, and 6.79% under different rolling reductions (10%, 30%, and 50%), respectively. The nucleation of δ phase mainly occurs on different sites (grain boundaries, new twin boundaries and old twin boundaries) under 10% rolling reduction, while δ phase mainly nucleates on the new grain boundaries of static recrystallization due to 50% rolling reduction. And the growth of δ phase undergoes a process of alternate orientation growth from spherical (nucleation) → short rod (longitudinal orientation growth) → short rod (radial orientation growth) → dynamic equilibrium. Under 10% rolling reduction, δ phase tends to grow into the matrix, while under 50% rolling reduction, the orientation grows faster and is easily affected by the grain boundary curvature.
|
Received: 24 November 2022
Published: 25 January 2024
|
|
|
|
Cite this article: |
Neng-yong Ye,Guang-liang Zhang,Tian-yue Huang, et al. Orientational growth behavior and mechanism of delta (δ) phase precipitation in cold-rolled Inconel 718 alloy during heat treatment[J]. Journal of Iron and Steel Research International, 2024, 31(1): 264-274.
|
|
|
|
[1] |
Xue-cheng Peng, Han-jie Guo, Xin-fang Zhang, Yi-wa Luo, Ye Sun, Jing Guo, Rong-guang Yang, Xiao-dan Zheng. Strengthening and control of second-phase particle precipitation in ferritic/austenitic/martensitic heat-resistant alloys: a review[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2024, 31(1): 3-23. |
[2] |
Wu-quan Yang, Zhi-ting Zhao, Liang-yu Zhu, Xun-yang Gao, Li Wang. Strip flatness prediction of cold rolling based on ensemble methods[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2024, 31(1): 237-251. |
[3] |
Yu-fan Shi, Cheng-jun Guo, Ming-quan Yuan, Zhen-bin Jia, Gui-huan An, Xiang-peng Xiao, Bin Yang. Effect of solidification rate on dendrite segregation and mechanical properties of Cu–15Ni–8Sn alloy prepared by directional solidification[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(8): 1586-1597. |
[4] |
Sha Zhang, Yu-chao Wu, Yu Li, Zhong-pei Dai, Dan Jia, Yan-fei Xu, Guang-sheng Zeng, Zhi-ming Guo, Jian Liu. Effect of stabilizing treatment on microstructure and stress rupture properties of phosphorus microalloyed Inconel 706 alloy[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(8): 1613-1621. |
[5] |
Si-shu Wang, Qian-hao Zang, Hong-mei Chen, Yu-hang Guo, Feng-jian Shi, Di Feng. Effect of extrusion temperature on microstructure and tensile properties of Mg–Gd–Er–Zn–Zr alloy containing LPSO phase[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(8): 1633-1641. |
[6] |
Chang Liu, Yu-feng Tian, Yong-li Xiao, Yong-qian Li, Yang Li, Guang-qiang Li, Qiang Wang. Numerical investigation of basic oxygen furnace slag modification with gas bottom-blowing and SiO2 modifier[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(7): 1451-1460. |
|
|
|
|