Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 26    No. 6    June 2016

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Correction of buckling distortion by ultrasonic shot peening treatment for 5A06 aluminum alloy welded structure
Ya-zhang HE1,2, Dong-po WANG1,2, Ying WANG1,2, Hai ZHANG1,2

1. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;
2. Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China

Abstract:Ultrasonic shot peening treatment (USPT) was proposed to correct welding buckling distortion. The residual stress distribution along the depth direction of the peened zone was measured by an X-ray diffractometer. The microstructure of the treated specimens was investigated by scanning electron microscopy (SEM). The Vickers microhardness was measured in different areas of welded joint before USPT and along the depth direction of the weld after USPT. The experimental results indicated that the welding buckling distortion of 5A06 aluminum alloy butt joint can be essentially corrected by USPT; the average correction rate reached 90.8% in this study. Furthermore, USPT enhanced specimens by work hardening. The microstructure of the peened zone was improved; moreover, the distribution of the precipitates and grains presented an apparent orientation.


Key words: welding bulking distortion; correction; ultrasonic shot peening treatment; residual stress

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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