vol25no4pa9

 

TJES: Abtan NS, Jassim AH, Al-Janabi MSM .Tensile Strength, Micro-hardness and Microstructure of Friction-Stir-Welding AA6061-T4 Joints. Tikrit Journal of Engineering Sciences 2018; 25 (4): 50-55.

APA: Abtan, N. S., Jassim,  A. H., Al-Janabi, M. S. M. (2018). Tensile Strength, Micro-hardness and Microstructure of Friction-Stir-Welding AA6061-T4 Joints Tikrit Journal of Engineering Sciences, 25(4), 50-55.

 


Keywords: Friction stir welding, AA6061-T4, tool rotational speed, feed rate, aluminum alloy

Tikrit Journal of Engineering Sciences (2018) 25(4) 50- 55

Tensile Strength, Micro-hardness and Microstructure of Friction-Stir-Welding AA6061-T4 Joints

Najeeb S. Abtan Ataalah Hussain Jassim Mustafa S. M. Al-Janabi
Department of Mechanical Engineering, College of Engineering, Tikrit University, Tikrit, Iraq

DOI: http://dx.doi.org/10.25130/tjes.25.4.09 
Abstract

Welding of aluminum alloys by traditional welding methods creates some defects such as hot cracks, porosity, and void that led to decreasing of mechanical properties. Friction Stir Welding (FSW) gives good mechanical properties of aluminum alloy welds. In this paper, FSW worked in 4 mm thick plate of 6061-T4 aluminum alloy, with two welding parameters are used (tool rotational speed and feed rate) was investigated, were analyzed the microstructure and mechanical properties by carried out microstructural, micro-hardness, and tensile strength tests. From results are found defect-free of welds at a wide range of parameters. Stir zone shows a fine-equiaxed grain and high hardness, not significantly change between heat affected zone and base metal in size grain. Tensile strength of welds was lower than base metal and fracture location was occurred at a low hardness region for the welds.

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References

[1] Imam M, Racherla V, Biswas K. Effect of post-weld natural aging on mechanical and microstructural properties of friction stir welded 6063-T4 aluminum alloy. Materials & Design2014; 64: 675-686.
[2] Lim S, Kim S, Lee C-G, Kim S. Tensile behavior of friction-stri-welded Al 6061-T651. Metallurgical and Materials Transactions A2004; 35 (9) :2829-2835.
[3] Liu F, Ma Z. Influence of tool dimension and welding parameters on microstructure and mechanical properties of friction-stir-welded 6061-T651 aluminum alloy. Metallurgical and materials transactions A 2008; 39 (10): 2378-2388.
[4] Malopheyev S, Vysotskiy I, Kulitskiy V, Mironov S, Kaibyshev R. Optimization of processing-microstructure-properties relationship in friction-stir welded 6061-T6 aluminum alloy. Materials Science and Engineering: A 2016; 662:136-143.
[5] Rodrigues D, et al. Influence of friction stir welding parameters on the microstructural and mechanical properties of AA 6016-T4 thin welds. Materials & Design2009; 30 (6): 1913-1921.


[6] Shalin M, Hiten M. Experimental analysis on effect of tool transverse feed, tool rotational speed and tool pin profile type on weld tensile strength of friction stir welded joint of AA 6061. Materials Today: Proceedings2018; 5 (1):487-493.
[7] Kumbhar N, Bhanumurthy K. Friction stir welding of Al 6061 alloy. Asian Journal of Experimental Sciences 2008; 22 (2): 63-74.
[8] Mohammadi J, Behnamian Y, Mostafaei A, Gerlich A. Tool geometry, rotation and travel speeds effects on the properties of dissimilar magnesium/aluminum friction stir welded lap joints. Materials & Design2015; 75: 95-112.
[9] Mishra RS, Ma Z. Friction stir welding and processing. Materials Science and Engineering 2005;50(1-2):1-78.
[10] Standard A. B557M tension testing wrought and cast aluminum and magnesium-alloy products. 2002.
[11] Scialpi A, De Filippis L, Cavaliere P. Influence of shoulder geometry on microstructure and mechanical properties of friction stir welded 6082 aluminium alloy. Materials & Design2007; 28 (4): 1124-1129.
[12] Mahoney M, Rhodes C, Flintoff J, Bingel W, Spurling R. Properties of friction-stir-welded 7075 T651 aluminum. Metallurgical and Materials Transactions A 1998;29(7):1955-1964.
[13] W, Guo X, McClure J, Murr L, Nunes A. Heat input and temperature distribution in friction stir welding. Journal of Materials Processing and Manufacturing Science1998; 7: 163-172.