Abstract
The effect of Zn content on the microstructures and mechanical properties of laser beam welded ZK series magnesium alloys (ZK21, ZK40, and ZK60) has been studied. Owing to the lower heat input, laser beam welding can successfully be employed to weld ZK series magnesium alloys having Zn content up to 4 wt%, which are difficult to weld by means of conventional arc welding. However, ZK60 is susceptible to solidification cracking and presents a poor weldability, which may originate from the net-like distribution of more Mg51Zn20 precipitates along grain boundaries (GBs) in the fusion zone (FZ). With increasing Zn content, the amount and size of precipitates along GBs in the FZ increase, and the morphology of grains in the FZ adjacent to fusion boundary changes from cellular to equiaxed dendritic. The grains in the FZ of ZK40 alloy are the finest among the three alloys, whose size is only about 4.8 μm, and the ZK40-welded joint achieves the highest ultimate tensile strength of 312 MPa, which is up to 90.4% of the base metal.
Similar content being viewed by others
References
Liu LM, Qi XD (2009) J Mater Sci 44:5725. doi:10.1007/s10853-009-3797-9
Liu LM, Song G, Zhu ML (2008) Mater Trans A 39:1702
Zhang ZD, Liu LM, Sun H, Wang L (2008) J Mater Sci 43:1382. doi:10.1007/s10853-007-2299-x
Wang CY, Wang XJ, Chang H, Wu K, Zheng MY (2007) Mater Sci Eng A 464:52
Kearns WH (1982) Welding handbook, vol 4. American Welding Society, Miami
Cao X, Rivaux B, Jahazi M, Cuddy J, Birur A (2009) J Mater Sci 44:4557. doi:10.1007/s10853-009-3691-5
Venkateswaran P, Xu ZH, Li XD, Reynolds AP (2009) J Mater Sci 44:4140. doi:10.1007/s10853-009-3607-4
Zhang Z, Chen JT (2008) J Mater Sci 43:222. doi:10.1007/s10853-007-2129-1
Coelho RS, Kostka A, Pinto H, Riekehr S, Kocak M, Pyzalla AR (2008) Mater Sci Eng A 485:20
Zhu JH, Li L, Liu Z (2005) Surf Sci 247:300
Quan YJ, Chen ZH, Yu ZH, Gong XS, Li M (2008) Mater Charact 59:1799
Baeslack WA III, Savage SJ, Froes FH (1986) J Mater Sci Lett 5:935
Cao X, Xiao M, Jahazi M, Immarigeon JP (2005) Mater Manuf Process 20:987
Anderson MM, Baker H (1999) ASM specialty handbook: magnesium and magnesium alloys. ASM International, Materials Park
Lancaster JF (1999) Metallurgy of welding. Woodhead, Cambridge
Higashi I, Shiotani N, Uda M, Mizoguchi T, Katoh H (1981) J Solid State Chem 36:225
Kou S (2002) Welding metallurgy. Wiley-Interscience, Hoboken
Acknowledgements
The research study described in this article was supported by the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-06-0701).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Yu, Z.H., Yan, H.G., Chen, J.H. et al. Effect of Zn content on the microstructures and mechanical properties of laser beam-welded ZK series magnesium alloys. J Mater Sci 45, 3797–3803 (2010). https://doi.org/10.1007/s10853-010-4434-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10853-010-4434-3