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JWJ > Volume 29(5); 2011 > Article
Journal of KWJS 2011 October;29(5) :82-89.
Published online November 22, 2011.
The Effect of Welding Condition on Tensile Properties of Friction Stir Welds of KS5J32 Al Alloy
Tae-Jin Yoon, Sang-Ju Kim, Nam-Kyu Kim, Sang-Woo Song, Chung-Yun Kang




Correspondence:   Published online November 22, 2011
ABSTRACT
  The effect of welding condition on tensile properties of KS5J32 Al Alloy was investigated under various welding conditions. The 1.6 mm thick KS5J32 alloy sheets were joined by friction stir welding (FSW) technique with butt joint. The tool rotation speeds were 1000, 1250 and 1500 rpm, and the welding speeds were varied within the range from 100 to 600 ㎜/min. Voids mainly occurred at the advancing side of the tool probe, when the tool rotation speed was low, due to insufficient materials flow. When the weld pitch exceeded 0.4 ㎜/rev, voids were observed under all welding conditions and the area of voids increased with increasing weld pitch. For void-free specimens, fracture always occurred at base materials. However voids affected the location of fractures, base metal or welded zone, when the voids existed within the welds.
Keywords: Friction stir welding;A5023;KS5J32;Weld pitch
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