Paper Titles

In Situ Observation of Diffusion Behavior and Microstructural Evolution on Interfaces in Al/Cu Bimetal
p.1020

Elastic Properties, Phonon Focusing and Electronic Structures of Typical Long-Period Superstructures Al₅Ti₂ and Al₁₁Ti₅
p.1026

Thermodynamic Calculation of Phase Equilibria in the Mn-RE (RE=Nd, Gd, Dy) Binary Systems
p.1036

Thermodynamic Calculation of the Rare Earth Permanent Magnets: Fe-RE (RE=Ho, Er, Tm, Sm) Binary Systems
p.1042

Microstructure Characterization of AZ31B Mg Alloy Welds Processed by Nd:YAG Laser Welding
p.1051

Effects of Ultrasonic Impact Treatment on the Residual Stress and Microstructure of TA15 Welded Joint
p.1056

Application of State of the Art Assessment for Pipeline Girth Weld
p.1063

Metal Magnetic Memory Testing of Welded Joints under Fatigue Load
p.1069

Microstructure and Mechanical Properties of X80 Girth Welds with Different Welding Processes
p.1079

HomeMaterials Science ForumMaterials Science Forum Vol. 898Microstructure Characterization of AZ31B Mg Alloy...

Microstructure Characterization of AZ31B Mg Alloy Welds Processed by Nd:YAG Laser Welding

Article Preview

Abstract:

The Nd:YAG laser welding process of AZ31B alloys was performed by using the six-axis robot in this work. The microstructure characterization of AZ31B auto-welded joints was studied by using scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The laser welding process resulted in the formation of equiaxed grains in the center of the fusion zone (FZ) and columnar grains near the FZ boundary, meanwhile some eutectic β-Mg17Al12 particles were observed in the microstructure. No clear heat affected zone (HAZ) was observed in the welded AZ31B joint. Furthermore, some pores were observed in the base material (BM) and FZ.

You might also be interested in these eBooks

IUMRS International Conference in Asia

Info:

Periodical:

Materials Science Forum (Volume 898)

Pages:

1051-1055

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.898.1051

Citation:

Cite this paper

Online since:

June 2017

Authors:

Hong Tao Liu, Ruo Chao Wang, Qing Liu, Ji Xue Zhou*, Yan Fei Chen, Bai Chang Ma, Yuan Sheng Yang

Keywords:

AZ31B Magnesium Alloy, Microstructure, Nd:YAG Laser Welding, Pores, Precipitation

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2017 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

[1] T.M. Pollock, Weight Loss with Magnesium Alloys, Science 328 (2010) 986-987.

[2] M.K. Kulekci, Magnesium and its alloys applications in automotive industry, Int. J. Adv. Manuf. Technol. 39 (2008) 851-865.

DOI: 10.1007/s00170-007-1279-2

[3] H. Hu, A. Yu, N. Li, J.E. Allison, Potential Magnesium Alloys for High Temperature Die Cast Automotive Applications: A Review, Mater. Manuf. Processes 18 (2003) 687-717.

DOI: 10.1081/amp-120024970

[4] R.S. Coelho, A. Kostka, H. Pinto, S. Riekehr, M. Kocak, A.R. Pyzalla, Microstructure and mechanical properties of magnesium alloy AZ31B laser beam welds, Mater. Sci. Eng. A 485 (2008) 20-30.

DOI: 10.1016/j.msea.2007.07.073

[5] T.C. Tsai, C.C. Chou, D.M. Tsai, K.T. Chiang, Modeling and analyzing the effects of heat treatment on the characteristics of magnesium alloy joint welded by the tungsten-arc inert gas welding, Mater. Des. 32 (2011) 4187-4194.

DOI: 10.1016/j.matdes.2011.04.040

[6] M. Harooni, B. Carlson, B.R. Strohmeier, R. Kovacevic, Pore formation mechanism and its mitigation in laser welding of AZ31B magnesium alloy in lap joint configuration, Mater. Des. 58 (2014) 265-276.

DOI: 10.1016/j.matdes.2014.01.050

[7] M. Gao, S. Mei, Z. Wang, X. Li, X. Zeng, Process and joint characterizations of laser-MIG hybrid welding of AZ31 magnesium alloy, J. Mater. Process. Technol. 212 (2012) 1338-1346.

DOI: 10.1016/j.jmatprotec.2012.01.011

[8] S. Mironov, T. Onuma, Y.S. Sato, H. Kokawa, Microstructure evolution during friction-stir welding of AZ31 magnesium alloy, Acta Mater. 100 (2015) 301-312.

DOI: 10.1016/j.actamat.2015.08.066

[9] L. Commin, M. Dumont, R. Rotinat, F. Pierron, J. -E. Masse, L. Barrallier, Texture evolution in Nd: YAG-laser welds of AZ31 magnesium alloy hot rolled sheets and its influence on mechanical properties, Mater. Sci. Eng. A 528 (2011) 2049-(2055).

DOI: 10.1016/j.msea.2010.11.061

[10] S.M. Chowdhury, D.L. Chen, S.D. Bhole, E. Powidajko, D.C. Weckman, Y. Zhou, Microstructure and mechanical properties of fiber-laser-welded and diode-laser-welded AZ31 magnesium Alloy, Metall. Mater. Trans. A 42A (2011) 1974-(1989).

DOI: 10.1007/s11661-010-0574-y

[11] X. Cao, M. Jahazi, J.P. Immarigeon, W. Wallace, A review of laser welding techniques for magnesium alloys, J. Mater. Process. Technol. 171 (2006) 188-204.

DOI: 10.1016/j.jmatprotec.2005.06.068

[12] X. Cao, M. Xiao, M. Jahazi, J.P. Immarigeon, Continuous wave Nd: YAG laser welding of sand-cast ZE41A-T5 magnesium alloys, Mater. Manuf. Processes 20 (2005) 987-1004.

DOI: 10.1081/amp-200060436

[13] H. Zhao, T. DebRoy, Pore formation during laser beam welding of die-cast magnesium alloy AM60B-mechanism and remedy, Weld. J. 80 (2001) 204S–210S.

[14] M. Wahba, M. Mizutani, Y. Kawahito, S. Katayama, Laser welding of die-cast AZ91D magnesium alloy, Mater. Des. 33 (2012) 569-576.

DOI: 10.1016/j.matdes.2011.05.016

[15] M. Marya, G.R. Edwards, The laser welding of magnesium alloy AZ91, Welding in the World 44 (2000) 31-37.

[16] L. Xiao, L. Liu, Y. Zhou, S. Esmaeili, Resistance-Spot-Welded AZ31 Magnesium Alloys: Part I. Dependence of Fusion Zone Microstructures on Second-Phase Particles, Metall. Mater. Trans. A 41 (2010) 1511-1522.

DOI: 10.1007/s11661-010-0197-3