| CHARACTERIZATION OF AZ31B MAGNESIUM ALLOY JOINTS WELDED WITH A Nd:YAG LASER | |
| Liu, Hongtao1; Zhou, Jixue1; Chen, Yanfei2; Li, Tao2; Jiao, Xuebing3; Yang, Yuansheng4; Lin, Tao2; Cheng, Kaiming1 | |
| Corresponding Author | Liu, Hongtao(kelekm73@163.com) |
| 2018 | |
| Source Publication | MATERIALI IN TEHNOLOGIJE
 |
| ISSN | 1580-2949 |
| Volume | 52Issue:4Pages:487-492 |
| Abstract | 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). |
| Keyword | AZ31B magnesium alloy Nd:YAG laser welding microstructure pores texture electron backscatter diffraction |
| Funding Organization | Natural Science Foundation of Shandong Province, China ; National Key Research and Development Plan of China ; Shandong Province Key Research and Development Plan, China ; Youth Foundation of Shandong Academy of Sciences, China |
| DOI | 10.17222/mit.2017.180 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Natural Science Foundation of Shandong Province, China[ZR2018BEE013] ; National Key Research and Development Plan of China[2017YFB0103904] ; National Key Research and Development Plan of China[2016YFB0701202] ; Shandong Province Key Research and Development Plan, China[2017CXGC0404] ; Shandong Province Key Research and Development Plan, China[2016ZDJS02A09] ; Youth Foundation of Shandong Academy of Sciences, China[2016QN015] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| WOS ID | WOS:000442176700017 |
| Publisher | INST ZA KOVINSKE MATERIALE I IN TEHNOLOGIE |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/129080 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liu, Hongtao |
| Affiliation | 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 |
| Recommended Citation GB/T 7714 | Liu, Hongtao,Zhou, Jixue,Chen, Yanfei,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, Hongtao.,Zhou, Jixue.,Chen, Yanfei.,Li, Tao.,Jiao, Xuebing.,...&Cheng, Kaiming.(2018).CHARACTERIZATION OF AZ31B MAGNESIUM ALLOY JOINTS WELDED WITH A Nd:YAG LASER.MATERIALI IN TEHNOLOGIJE,52(4),487-492. |
| MLA | Liu, Hongtao,et al."CHARACTERIZATION OF AZ31B MAGNESIUM ALLOY JOINTS WELDED WITH A Nd:YAG LASER".MATERIALI IN TEHNOLOGIJE 52.4(2018):487-492. |
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