Zhang Xianguang, Han Haoran, Zhou Yang, Chen Jiajun, Feng Shouli, Tang Pingmei, Xiao Dongping, Fu Jianhui, Zhang Jian
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Chengdu Advanced Metal Materials Industrial Technology Institute Co., Ltd., Chengdu 610300, China.
Materials (Basel). 2024 Dec 16;17(24):6150. doi: 10.3390/ma17246150.
The effects of a solution treatment on the microstructure and elevated mechanical properties of the forged Rene 41 superalloy were investigated. The results indicate that the solution treatment temperature has a significant influence on the γ' structure and mechanical properties. The sub-solvus solution treatment resulted in the co-existence of residual primary coarse γ' precipitates and fine secondary γ' precipitates, while the super-solvus solution treatments led to the complete dissolution of the primary γ' precipitates and the precipitation of a nano-sized secondary spherical γ' precipitate. The tensile strength increased and then decreased when the solution temperature increased from the sub-solvus to super-solvus solution treatments. In addition, the solution treatment time has a negligible influence on the γ' and overall mechanical properties due to the complete dissolution of γ' during the solution treatment at 1080 °C for 1 h. Moreover, the cooling rate following the solution treatment plays a significant role regarding the size and morphology of γ' and the mechanical properties. The secondary γ' changed gradually from spherical to concave cubic and octo-cubic and coarsened with the decrease in the cooling rate, resulting in an apparent decrease in strength and increase in ductility.
研究了固溶处理对锻造Rene 41高温合金微观结构和提高力学性能的影响。结果表明，固溶处理温度对γ'结构和力学性能有显著影响。亚固溶处理导致残余一次粗大γ'析出物和细小二次γ'析出物共存，而超固溶处理导致一次γ'析出物完全溶解并析出纳米尺寸的二次球形γ'析出物。当固溶温度从亚固溶处理升高到超固溶处理时，拉伸强度先增加后降低。此外，由于在1080℃固溶处理1小时期间γ'完全溶解，固溶处理时间对γ'和整体力学性能的影响可忽略不计。此外，固溶处理后的冷却速率对γ'的尺寸和形态以及力学性能起着重要作用。二次γ'逐渐从球形变为凹立方和八面体立方，并随着冷却速率的降低而粗化，导致强度明显降低和延展性增加。
