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Influence of Holding Time on Hot Deformation Behavior of Hard-Deformed Superalloy U 720Li

文献类型：期刊论文

作者Zang, Ximin1; Zhao, Guangdi2; Wu, Jinjiang2; Jiang, Haoyuan2; Yao, Xiaoyu3
刊名RARE METAL MATERIALS AND ENGINEERING
出版日期2024-09-01
卷号53期号:9页码:2446-2457
关键词-deformed superalloy hot deformation behavior processing map dynamic recrystallization
ISSN号1002-185X
DOI10.12442/j.issn.1002-185X.20230790
通讯作者Zhao, Guangdi(gdzhao12s@alum.imr.ac.cn)
英文摘要To improve the hot workability of hard-deformed superalloy U720Li, the effect of holding time before deformation (5 and 10 min) on hot deformation behavior was investigated by hot compression tests. Results show that the flow stress increases with increase in strain rate, while decreases with increase in deformation temperature and holding time. Based on the obtained Arrheniustype constitutive models, the calculated peak stresses are in good agreement with experimental values, indicating that this model can accurately predict the hot deformation behavior of U720Li alloy, and the deformation activation energies for the holding time of 5 and 10 min were calculated to be 992.006 and 850.996 kJmol-1, respectively. Moreover, processing maps of U720Li alloy with these two holding durations were constructed. Through observation of deformation microstructures in each domain of the processing maps, the optimal hot working conditions for the holding time of 5 min are determined to be 1090-1110 degrees C/ 1-10 s-1 and 1146-1180 degrees C/1-10 s-1, and the optimal hot working conditions for the holding time of 10 min are 1080-1090 degrees C/1-10 s-1 and 1153-1160 degrees C/1-10 s-1, indicating that the safe processing window can be obviously enlarged by shortening the holding time reasonably. In the absence of cracking, the dynamic recrystallization (DRX) grain size increases gradually with increasing the deformation temperature and holding time, but it first decreases and then increases with the increase in strain rate. When the deformation temperature is below 1100 degrees C, the DRX mechanism is mainly the particle-induced continuous DRX. As the temperature is raised to above 1130 degrees C, the main DRX mechanism changes to discontinuous DRX.
资助项目National Natural Science Foundation of China[52174317] ; National Natural Science Foundation of China[51904146]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001352049200006
出版者NORTHWEST INST NONFERROUS METAL RESEARCH
资助机构National Natural Science Foundation of China
源URL  
专题金属研究所_中国科学院金属研究所
通讯作者Zhao, Guangdi
作者单位1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China
2.Univ Sci & Technol Liaoning, Sch Mat & Met, Anshan 114051, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式
GB/T 7714		 Zang, Ximin,Zhao, Guangdi,Wu, Jinjiang,et al. Influence of Holding Time on Hot Deformation Behavior of Hard-Deformed Superalloy U 720Li[J]. RARE METAL MATERIALS AND ENGINEERING,2024,53(9):2446-2457.
APA Zang, Ximin,Zhao, Guangdi,Wu, Jinjiang,Jiang, Haoyuan,&Yao, Xiaoyu.(2024).Influence of Holding Time on Hot Deformation Behavior of Hard-Deformed Superalloy U 720Li.RARE METAL MATERIALS AND ENGINEERING,53(9),2446-2457.
MLA Zang, Ximin,et al."Influence of Holding Time on Hot Deformation Behavior of Hard-Deformed Superalloy U 720Li".RARE METAL MATERIALS AND ENGINEERING 53.9(2024):2446-2457.

入库方式： OAI收割

来源：金属研究所

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