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

doi:10.12442/j.issn.1002-185X.20230790

IMR OpenIR

	Influence of Holding Time on Hot Deformation Behavior of Hard-Deformed Superalloy U 720Li
	Zang, Ximin 1; Zhao, Guangdi 2; Wu, Jinjiang 2; Jiang, Haoyuan 2; Yao, Xiaoyu 3
通讯作者	Zhao, Guangdi(gdzhao12s@alum.imr.ac.cn)
	2024-09-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	53 期号:9 页码:2446-2457
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.
关键词	-deformed superalloy hot deformation behavior processing map dynamic recrystallization
资助者	National Natural Science Foundation of China
DOI	10.12442/j.issn.1002-185X.20230790
收录类别	SCI
语种	英语
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
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001352049200006
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191355
专题	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.