Effect of microstructural features on the failure behavior of hybrid laser welded AA7020

doi:10.1111/ffe.12838

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Effect of microstructural features on the failure behavior of hybrid laser welded AA7020
	Hu, YN ; Wu, SC ; Song, Z ; Fu, YN ; Yuan, QX ; Zhang, LL
刊名	FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
	2018
卷号	41 期号:9 页码:2010-2023
关键词	X-RAY MICROTOMOGRAPHY ALUMINUM-ALLOY MECHANICAL-PROPERTIES FATIGUE PROPERTIES AL-ALLOY STRENGTH POROSITY CRACKING JOINTS FRACTURE
ISSN号	8756-758X
DOI	10.1111/ffe.12838
文献子类	期刊论文
英文摘要	Detailed investigations of microstructural feature, mechanical property, fatigue strength, and damage mechanism were conducted on hybrid laser welded 7020-T651 aluminum alloys used into high-speed railway vehicles. The results show that the hybrid laser welding process can induce significant changes of microstructures and alloying elements, together with numerous gas pores. Such local modifications degrade the fatigue performance. The tensile strength of welded joints was approximately 74% with respect to the base metal, thus satisfying the design standard. The fatigue property was determined in the low and high cycle regimes. It was found that the fatigue strength of welded joints was fairly inferior to that of the base metal, but far higher than the IIW recommended value. Furthermore, welding defects were well believed to contribute to the shorter fatigue life. The small fatigue crack growth presented highly discontinuous and inhomogeneous due to microstructure and porosity. By contrast, the crack stable growth stage was less sensitive to microstructural features of hybrid welded joints.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/30914]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Inst High Energy Phys, BSRF, Beijing 100049, Peoples R China 2.Southwest Jiaotong Univ, State Key Lab Tract Power, Chengdu 610031, Sichuan, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Appl Phys, SSRF, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	Hu, YN,Wu, SC,Song, Z,et al. Effect of microstructural features on the failure behavior of hybrid laser welded AA7020[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,2018,41(9):2010-2023.
APA	Hu, YN,Wu, SC,Song, Z,Fu, YN,Yuan, QX,&Zhang, LL.(2018).Effect of microstructural features on the failure behavior of hybrid laser welded AA7020.FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,41(9),2010-2023.
MLA	Hu, YN,et al."Effect of microstructural features on the failure behavior of hybrid laser welded AA7020".FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 41.9(2018):2010-2023.