Dependence of deformation mechanisms on micro-pores in the fourth-generation single crystal superalloy during out-of-phase thermal-mechanical fatigue

doi:10.1016/j.ijfatigue.2023.108086

IMR OpenIR

	Dependence of deformation mechanisms on micro-pores in the fourth-generation single crystal superalloy during out-of-phase thermal-mechanical fatigue
	Tan, Zihao 1,2; Wang, Xinguang 1; Ge, Zhicheng 3; Mu, Yahang 1,2; Li, Yongmei 1,2; Pang, Jianchao 1; Tao, Xipeng 1; Zou, Mingke 1; Yang, Yanhong 1; Liu, Jide 1; Liu, Jinlai 1; Li, Jinguo 1; Zhou, Yizhou 1; Sun, Xiaofeng 1
通讯作者	Wang, Xinguang(xgwang11b@imr.ac.cn) ; Sun, Xiaofeng(xfsun@imr.ac.cn)
	2024-03-01
发表期刊	INTERNATIONAL JOURNAL OF FATIGUE
ISSN	0142-1123
卷号	180 页码:13
摘要	The high-temperature and long-term solution heat treatments of fourth-generation single crystal (SX) superalloys have sparked an increasing number of homogenization pores in the alloy. Out-of-phase (OP) thermal-mechanical fatigue (TMF) experiments were conducted to elucidate the effect of pores on the fatigue behaviors and deformation mechanisms. The results showed that the plastic deformation was mainly concentrated upon gamma matrix in regions away from pores, more specifically, intrinsic stacking fault (ISF) and extrinsic stacking fault (ESF) as well as dislocation cross-slipping were detected. In areas near micropores, however, the gamma/gamma '-structure was subjected to severe twinning shearing. High-resolution observation illustrated that the amount of ESF and a/6 112 twinning dislocations had remarkably increased. Besides, the partial dislocations were more prone to move in different slipping systems at these regions with considerable stress concentration. These factors collectively enabled the formation of deformation twins from the edge of micro-pores. Moreover, the twinning nucleation could occur near both H-pores and S-pores, while the increasing pore size would enhance the nucleation and propagation of pore-induced twins by a large margin. These findings reported have provided important guidance for the future application of the fourth-generation SX superalloys.
关键词	Fourth -generation single crystal superalloy Thermal -mechanical fatigue Micro -pores Deformation mechanism Twinning
资助者	National Key R & D Program of China ; Middle-aged and Youth Tal- ents in Scientific and Technological Innovation Project of Shenyang ; Excellent Youth Foundation of Liaoning Province ; National Science and Technology Major Project
DOI	10.1016/j.ijfatigue.2023.108086
收录类别	SCI
语种	英语
资助项目	National Key R & D Program of China[2017YFA0700704] ; Middle-aged and Youth Tal- ents in Scientific and Technological Innovation Project of Shenyang[RC220440] ; Excellent Youth Foundation of Liaoning Province[2021-YQ-02] ; National Science and Technology Major Project[2017 -VI -0002-0072]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary
WOS记录号	WOS:001139985700001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：7[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/321006/183524
专题	中国科学院金属研究所
通讯作者	Wang, Xinguang; Sun, Xiaofeng
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Inst Corros Sci & Technol, Guangzhou 510530, Peoples R China
推荐引用方式 GB/T 7714	Tan, Zihao,Wang, Xinguang,Ge, Zhicheng,et al. Dependence of deformation mechanisms on micro-pores in the fourth-generation single crystal superalloy during out-of-phase thermal-mechanical fatigue[J]. INTERNATIONAL JOURNAL OF FATIGUE,2024,180:13.
APA	Tan, Zihao.,Wang, Xinguang.,Ge, Zhicheng.,Mu, Yahang.,Li, Yongmei.,...&Sun, Xiaofeng.(2024).Dependence of deformation mechanisms on micro-pores in the fourth-generation single crystal superalloy during out-of-phase thermal-mechanical fatigue.INTERNATIONAL JOURNAL OF FATIGUE,180,13.
MLA	Tan, Zihao,et al."Dependence of deformation mechanisms on micro-pores in the fourth-generation single crystal superalloy during out-of-phase thermal-mechanical fatigue".INTERNATIONAL JOURNAL OF FATIGUE 180(2024):13.