CHARACTERIZATION OF AZ31B MAGNESIUM ALLOY JOINTS WELDED WITH A Nd:YAG LASER

doi:10.17222/mit.2017.180

CORC > 金属研究所 > 中国科学院金属研究所

	CHARACTERIZATION OF AZ31B MAGNESIUM ALLOY JOINTS WELDED WITH A Nd:YAG LASER
	Liu, HT ; Zhou, JX ; Chen, YF ; Li, T 1; Jiao, XB ; Yang, YS ; Lin, T 1; Cheng, KM
刊名	MATERIALI IN TEHNOLOGIJE
	2018-01-13
卷号	52 期号:4 页码:487-492
关键词	AZ31B magnesium alloy Nd:YAG laser welding microstructure pores texture electron backscatter diffraction
ISSN号	1580-2949
DOI	10.17222/mit.2017.180
英文摘要	In the present study, an AZ31B magnesium alloy was welded using a low-power pulsed Nd:YAG laser attached to a six-axis welding robot. The welding metallurgical characteristics, including microstructure, porosity formation, texture evolution and microhardness distribution were systematically investigated using a scanning electron microscope (SEM), electron backscatter diffraction (EBSD) and a microhardness tester. The transverse cross-sectional microstructure of the AZ31B-alloy joint was composed of the base metal (BM), columnar-grain zone (CGZ) and equiaxed-grain zone (EGZ) in the center of the fusion zone (FZ). Some pores were observed in the FZ and believed to be related to the pre-existing pores in the BM. Especially, it was noted that many columnar grains observed in the transverse cross-section of the FZ were almost perpendicular to the solid-fusion boundary. Nevertheless, a large number of fine equiaxed grains formed on the top surface of the FL and exhibited obvious random orientations. Different grain-growth mechanisms found on the transverse cross-section and the top surface of the weld bead were empirically investigated. Owing to apparent grain coarsening, the lowest microhardness value (similar to 43 HV) was detected in the center of the FZ, which was evidently lower than that of the BM (similar to 68 HV).
学科主题	Materials Science, Multidisciplinary
语种	英语
WOS记录号	WOS:000442176700017
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/80231]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Shandong Acad Sci, Adv Mat Inst, Shandong Key Lab High Strength Lightweight Metall, Jinan 250014, Shandong, Peoples R China 2.Shandong Acad Sci, Shandong Engn Res Ctr Lightweight Automobiles Mag, Adv Mat Inst, Jinan 250014, Shandong, Peoples R China 3.Shandong Jianzhu Univ, Coll Mat Sci & Engn, Jinan 250101, Shandong, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Liu, HT,Zhou, JX,Chen, YF,et al. CHARACTERIZATION OF AZ31B MAGNESIUM ALLOY JOINTS WELDED WITH A Nd:YAG LASER[J]. MATERIALI IN TEHNOLOGIJE,2018,52(4):487-492.
APA	Liu, HT.,Zhou, JX.,Chen, YF.,Li, T.,Jiao, XB.,...&Cheng, KM.(2018).CHARACTERIZATION OF AZ31B MAGNESIUM ALLOY JOINTS WELDED WITH A Nd:YAG LASER.MATERIALI IN TEHNOLOGIJE,52(4),487-492.
MLA	Liu, HT,et al."CHARACTERIZATION OF AZ31B MAGNESIUM ALLOY JOINTS WELDED WITH A Nd:YAG LASER".MATERIALI IN TEHNOLOGIJE 52.4(2018):487-492.