Effects of Inoculation on Microstructures and Mechanical Properties of Resistance Spot Welded Magnesium Alloy Joints

Abstract:

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Resistance spot welded magnesium alloy joints contain the nugget and heat affected zone (HAZ), and the weld nugget of magnesium alloy generally contains two different microstructures, the cellular dendritic crystals at the edge of the nugget and the equiaxed dendritic crystals in the center of the nugget. Characteristics of cellular dendritic crystals make the cellular dendritic crystals zone to be the weak area, and the more unfortunate thing is that it is located in the high-stress zone, which further degrades the mechanical properties of the joints. Based on this conditions, inoculation would be tried to refine the cellular dendritic crystals in order to improve the mechanical properties of resistance spot welded magnesium alloy joints. Al-10Sr was chosen as the inoculant in this experiment. As the addition of Al-10Sr increases from zero to 1.4mg, the average width of cellular dendritic crystal zone decreases from 332μm to 58μm while the microstructure tends to be refined, accordingly, tensile shear load of the joints increases by 24.3% from 2.379 KN to 2.959 KN. It is favorable to select a relative higher content of Al-10Sr addition to improve the mechanical properties of the spot welded magnesium alloy joints.

Info:

Periodical:

Advanced Materials Research (Volumes 482-484)

Edited by:

Wenzhe Chen, Xingjun Liu, Pinqiang Dai, Yonglu Chen and Zhengyi Jiang

Pages:

2142-2147

Citation:

H. X. Sun et al., "Effects of Inoculation on Microstructures and Mechanical Properties of Resistance Spot Welded Magnesium Alloy Joints", Advanced Materials Research, Vols. 482-484, pp. 2142-2147, 2012

Online since:

February 2012

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$38.00

[1] Sotomi Ishihara, Zhenyu Nan and Takahito Goshima: Materials Science and Engineering A. Vol. 468-470 (2007), P. 214.

DOI: https://doi.org/10.1016/j.msea.2006.09.124

[2] Y. Uematsu, K. Tokaji, M. Kamakurab and K. Uchida: Materials Science and Engineering A. Vol. 434 (2006), P. 131.

[3] M.F. Montemor, A.M. Simões and M.J. Carmezim: Applied Surface Science. Vol. 253 (2007), P. 6922.

[4] W. Li, H. Zhou, W. Zhou, W.P. Li and M.X. Wang: Materials Letters. Vol. 61(2007), P. 2772.

[5] Zhengxing Zhu, Xiangming Yan and Min Wang: Technology of Resistance Spot Welding ( Mechanical Industry Press, Beijing 2006 ) ( in chinese).

[6] Yarong Wang, Zhongdian Zhang and Jicai Feng: Transactions of the China Welding Institution. Vol. 25 (2004), P. 11 ( in chinese).

[7] Y. R. Wang, J. C. Feng and Z. D. Zhang: Science and Technology of Welding and Joining. Vol. 11 (2006), P. 555.

[8] B. Lang, D. Q. Sun, Z. Z. Xuan and X. F Qin: ISIJ International. Vol. 48 (2008), P. 77.

[9] D.Q. Sun, B. Lang, D.X. Sun and J.B. Li: Materials Science and Engineering A. Vol. 460-461 (2007), P. 494.

[10] Mingbo Yang, Renju Cheng and Fusheng Pan: Rare Metal Materials and Engineering. Vol. 37 (2008), P. 413 ( in chinese).

[11] Shengfa Liu and Huiyuan Wang: Rare Metal Materials and Engineering. Vol. 35(2006), P. 970 ( in chinese).

[12] Zili Liu, Yifu Shen and Lei Wang: Journal of Materials Science and Engineering. Vol. 22 (22), P. 146 ( in chinese ).