EFFECTS OF TEMPERATURE AND STRAIN AMPLITUDE ON LOW-CYCLE FATIGUE PROPERTIES OF NICKEL-BASED SINGLE-CRYSTAL SUPERALLOY DD419

doi:10.17222/mit.2024.1169

IMR OpenIR

	EFFECTS OF TEMPERATURE AND STRAIN AMPLITUDE ON LOW-CYCLE FATIGUE PROPERTIES OF NICKEL-BASED SINGLE-CRYSTAL SUPERALLOY DD419
	Du, Xiaoming 1; Dong, Weiye 1; Zhu, Xiang 1; Liu, Jide 2; Wang, Zhijun 3; Li, Tianfu 3
通讯作者	Du, Xiaoming(du511@163.com)
	2024
发表期刊	MATERIALI IN TEHNOLOGIJE
ISSN	1580-2949
卷号	58 期号:5 页码:567-575
摘要	High-temperature and low-cycle fatigue tests were conducted on a nickel-based single-crystal superalloy DD419 under total strain-controlled conditions at 760 degrees C and 980 degrees C. The fatigue properties of the alloy are discussed by analysing the fatigue test data. Fracture morphology and dislocation structure were observed using scanning electron microscopy and transmission electron microscopy. At the same strain amplitude, the results indicate that the plastic deformation of the alloy is larger at 980 degrees C compared to 760 degrees C. This leads to a lower fatigue strength and shorter fatigue life, along with more severe damage. The value of the strain amplitude affects the cyclic stress response behaviour of the alloy. Under low strain amplitudes, the cyclic stress response behaviour differs between 760 degrees C and 980 degrees C. The hysteresis loop exhibits similar shapes at 760 degrees C and 980 degrees C, with an increase in the area as the strain amplitude rises. The fatigue fracture analysis indicates that micropores on the surface are the primary fatigue sources at 760 degrees C, while oxides on the surface are the main fatigue source at 980 degrees C, leading to cracking due to multiple sources. Moreover, transmission electron microscopy reveals that the deformation mechanism involving dislocations at 760 degrees C primarily occurs through plane slip and wave slip, whereas at 980 degrees C, dislocations mainly move through cross slip and climb.
关键词	nickel-based single-crystal superalloy low-cycle fatigue temperature strain
资助者	Liaoning Provincial Applied Basic Research Project ; National Natural Science Foundation of China ; Basic Research Projects of Higher Education Institutions in Liaoning Province
DOI	10.17222/mit.2024.1169
收录类别	SCI
语种	英语
资助项目	Liaoning Provincial Applied Basic Research Project[2023JH2/101300233] ; National Natural Science Foundation of China[12375305] ; Basic Research Projects of Higher Education Institutions in Liaoning Province[JYTZD20230004] ; Basic Research Projects of Higher Education Institutions in Liaoning Province[JYTMS20230193]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001339304000004
出版者	INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/190954
专题	中国科学院金属研究所
通讯作者	Du, Xiaoming
作者单位	1.Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110159, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.China Inst Atom Energy, Beijing 102413, Peoples R China
推荐引用方式 GB/T 7714	Du, Xiaoming,Dong, Weiye,Zhu, Xiang,et al. EFFECTS OF TEMPERATURE AND STRAIN AMPLITUDE ON LOW-CYCLE FATIGUE PROPERTIES OF NICKEL-BASED SINGLE-CRYSTAL SUPERALLOY DD419[J]. MATERIALI IN TEHNOLOGIJE,2024,58(5):567-575.
APA	Du, Xiaoming,Dong, Weiye,Zhu, Xiang,Liu, Jide,Wang, Zhijun,&Li, Tianfu.(2024).EFFECTS OF TEMPERATURE AND STRAIN AMPLITUDE ON LOW-CYCLE FATIGUE PROPERTIES OF NICKEL-BASED SINGLE-CRYSTAL SUPERALLOY DD419.MATERIALI IN TEHNOLOGIJE,58(5),567-575.
MLA	Du, Xiaoming,et al."EFFECTS OF TEMPERATURE AND STRAIN AMPLITUDE ON LOW-CYCLE FATIGUE PROPERTIES OF NICKEL-BASED SINGLE-CRYSTAL SUPERALLOY DD419".MATERIALI IN TEHNOLOGIJE 58.5(2024):567-575.