In-Phase Thermal-Mechanical Fatigue Behavior and Damage Mechanism of a Fourth-Generation Ni-Based Single-Crystal Superalloy

doi:10.11900/0412.1961.2022.00309

IMR OpenIR

	In-Phase Thermal-Mechanical Fatigue Behavior and Damage Mechanism of a Fourth-Generation Ni-Based Single-Crystal Superalloy
	Tan Zihao 1; Li Yongmei 1,2; Wang Xinguang 1; Zhao Haochuan ; Tan Haibing 3; Wang Biao 3; 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)
	2024-02-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:2 页码:154-166
摘要	During the service, the turbine blades of aero-engines are subjected to a complex and ever-changing combination of temperature and stress, resulting in severe cyclic temperature/strain damages and thermal-mechanical fatigue (TMF) failures of the alloy. In this work, in-phase (IP) TMF tests under 600-1000 degrees C were conducted on a newly developed fourth-generation single-crystal superalloy. The alloy.. s fracture characteristics and comprehensive damage mechanisms were examined via SEM, EBSD, and TEM. The results showed that when the strain range increased, the fatigue life of the experimental alloy noticeably decreased, and the hysteresis loop clearly opened. Stress response behaviors shifted from cyclic softening at high temperatures and cyclic hardening at low temperatures into a dominant characteristic of cyclic stabilizing. The fracture surfaces of alloys displayed ductile features after fatigue fracture under various circumstances, and the area fraction of dimples reduced with increasing strain amplitude. When the strain amplitude was low, the alloy was mainly subjected to oxidation damage, accompanied with a certain degree of creep damage. In contrast, the dominant deformation mechanism of the alloy was dislocation slipping in g matrix and Orowan by-passing through g' particles. As the strain amplitude increased to higher levels, the alloy was subjected to severe plastic deformation damage, while the degree of oxidation damage had been alleviated. Under this condition, the interfacial dislocations could shear into the g' phase with the generated stacking fault or anti-phase boundary. Notably, no recrystallization grains or deformation twins were formed in the DD91 alloy during the IP-TMF experiments at different mechanical strain amplitudes.
关键词	fourth-generation single-crystal superalloy thermal-mechanical fatigue fracture characteristic oxidation behavior damage mechanism
资助者	National Science and Technology Major Project ; National Key Research and Development Program of China ; Program of CAS Interdisciplinary Innovation Team ; Youth Innovation Promotion Association
DOI	10.11900/0412.1961.2022.00309
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project[2017-VI-0002-0072] ; National Key Research and Development Program of China[2017YFA0700704] ; Program of CAS Interdisciplinary Innovation Team ; Youth Innovation Promotion Association
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001153599200003
出版者	SCIENCE PRESS
引用统计	被引频次：2[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/321006/184057
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.Aero Engine Corp China, Inst Sichuan Gas Turbine Res, Chengdu 610500, Peoples R China
推荐引用方式 GB/T 7714	Tan Zihao,Li Yongmei,Wang Xinguang,et al. In-Phase Thermal-Mechanical Fatigue Behavior and Damage Mechanism of a Fourth-Generation Ni-Based Single-Crystal Superalloy[J]. ACTA METALLURGICA SINICA,2024,60(2):154-166.
APA	Tan Zihao.,Li Yongmei.,Wang Xinguang.,Zhao Haochuan.,Tan Haibing.,...&Sun Xiaofeng.(2024).In-Phase Thermal-Mechanical Fatigue Behavior and Damage Mechanism of a Fourth-Generation Ni-Based Single-Crystal Superalloy.ACTA METALLURGICA SINICA,60(2),154-166.
MLA	Tan Zihao,et al."In-Phase Thermal-Mechanical Fatigue Behavior and Damage Mechanism of a Fourth-Generation Ni-Based Single-Crystal Superalloy".ACTA METALLURGICA SINICA 60.2(2024):154-166.