Friction Stir Welding in Inert Gas Environment (FSW-IG) of AZ31B Magnesium Alloy

Abstract:

Friction stir welding is an area of interest within ISIM Timisoara, several research projects that have addressed this issue being carried out. At ISIM the research started with the approach of FSW welding of some aluminum alloys (as similar and dissimilar materials) and later extended to other types of non-ferrous metallic materials (magnesium, titanium, copper alloys) and different types of steels respectively. New methods / possibilities of application of the FSW welding process were also researched. The paper presents results obtained by ISIM Timisoara within an ongoing national research project regarding the friction stir welding in inert gas environment (FSW-IG) of the AZ31B magnesium alloy. The experimental research aimed to perform a comparative analysis between the FSW-IG welding and the classic FSW welding for AZ31B magnesium alloy, in the same working conditions in terms of welding equipment, welding tools and technological process parameters. The obtained results show that the application of FSW-IG welding compared to the classic FSW welding brings benefits in terms of weld surface appearance, mechanical strength, elongation at break and behavior to the static bending tests.

• Periodical: Defect and Diffusion Forum (Volume 416)
• Pages: 21-29
• DOI: https://doi.org/10.4028/p-cf745l
• Online since: May 2022
• Authors: Radu Cojocaru*, Lia-Nicoleta Botila, Horia Florin Daşcău
• Keywords: AZ31B Magnesium Alloy, Friction Stir Welding, Inert Gas Environment

References

[1] B. L. Mordike and T. Ebert, Magnesium: properties-applications-potential, Mater. Sci. Eng. A, Vol. 302, pp. (37–45) (2001).

[2] M. M Avedesian, Magnesium and Magnesium Alloys, ASM International, Materials Park, Ohio (1999).

[3] J. Swiostek, J. Bober, C. Blawert, D. Letzig, W. Hintze and K. U. Kainer, Die Forging of Commercial and Modified Magnesium Alloys, Proceedings of the 7th International Conference on Magnesium Alloys and Their Applications, pp.344-351 (2006).

DOI: 10.1002/3527603565.ch43

[4] E. Ghali, Corrosion resistance of aluminium and magnesium alloys: understanding, performance and testing, Chap 10 in the book: Corrosion resistance, Pub: John Wiley, 349, Print ISBN: 978-0-471-71576-4, Online ISBN: 978-0-470-53177-8(2010).

DOI: 10.1002/9780470531778

[5] Zhu Rong, Ji Wenqing, Wu Yanjun, Cai Xiaotian and Yu Ying, Effect of aging treatment on low–cycle fatigue behavior of extruded Mg–8Al–0.5Zn alloys, Mater. Des. ; 41:203–7 (2012).

DOI: 10.1016/j.matdes.2012.05.015

[6] M. Marya, D. L. Olson and G. R. Edwards, Welding of magnesium alloys for transportation applications, Proceedings from Materials Solution '00 on Joining of Advanced and Specialty Materials, pp.122-128, St. Louis, Missouri, 9–11 October (2000).

[7] X. Yang, Y. Okabe, H. Miura and T. Sakai, Annealing of a magnesium alloy AZ31 after interrupted cold deformation,.

DOI: 10.1016/j.matdes.2011.12.001

[8] L. Commin, M. Dumont, J.E. Masse and L. Barrallier, Friction stir welding of AZ31 magnesium alloy rolled sheets: influence of processing parameters, Acta Mater. 57: 326–34 (2009).

DOI: 10.1016/j.actamat.2008.09.011

[9] D. Dehelean, a.o., Innovative and ecological technologies to process advanced materials by friction stir welding, Project CEEX No. 66, ISIM Timisoara, 2006-2008.

[10] D. Dehelean, B. Radu, a.o, Friction stir welding of aluminum magnesium dissimilar joints, Proceedings of the 25th International Conference Welding 2008,Subotica Serbia, June 4-6, (2008).

[11] L.N. Boțilă, R. Cojocaru and V. Verbițchi, Ecological joining process for AZ31B magnesium alloy, Key Eng. Mater.

DOI: 10.4028/www.scientific.net/kem.890.76

[12] L.N. Boțilă, R. Cojocaru, a.o, Research on the development of new innovative methods for application of the friction stir welding process in order to expand the possibilities of application in priority areas, project PN 19 36 01 01/2019-2022 (funded by the Ministry of Research, Innovation and Digitization within the Nucleu Program of ISIM Timisoara, contract 35N/2019).

DOI: 10.4028/p-wr0f72