论文信息 - The effect of controlled shot peening on fusion welded joints

The effect of controlled shot peening on fusion welded joints

This work examines the effect of controlled shot peening (CSP) treatment on the fatigue strength of an ASTM A516 grade 70 carbon steel welded joint. Metallurgical modifications, hardness, elemental compositions, and internal discontinuities, such as porosity, inclusions, lack of penetration, and undercut found in treated and untreated fusion welded joints, were characterized. The fatigue results of as-welded and peened skimmed joints were compared. It was observed that the effect of the CSP and skimming processes improved the fatigue life of the fusion weld by 50% on MMA-welded, 63% on MIG-welded, and 60% on TIG-welded samples.

[1] M. A. Wahab,et al. The significance of weld imperfections and surface peening on fatigue crack propagation life of butt-welded joints , 2004 .

[2] Lixing Huo,et al. Discussion on fatigue design of welded joints enhanced by ultrasonic peening treatment (UPT) , 2009 .

[3] H. O. Fuchs,et al. Metal fatigue in engineering , 2001 .

[4] Peng Liu,et al. Microstructure characteristics in TIG welded joint of Mg/Al dissimilar materials , 2007 .

[5] Marcio H. S. Siqueira,et al. Estimated accuracy of classification of defects detected in welded joints by radiographic tests , 2005 .

[6] R. Kaçar,et al. Effect of controlled atmosphere on the mig-mag arc weldment properties , 2005 .

[7] W. J. Baxter. Fatigue of material: by S. Suresh; published by Cambridge University Press, Cambridge, 1991; 586 pp.; price, £60, US$95.00 , 1992 .

[8] A. Levers,et al. The effect of controlled shot peening on the fatigue behaviour of 2024-T3 aluminium friction stir welds , 2007 .

[9] S. Bhole,et al. Fracture behavior in a pressure vessel steel weld , 2002 .

[10] John W. H. Price,et al. Residual stresses measurement by neutron diffraction and theoretical estimation in a single weld bead , 2006 .

[11] G. Totten. FATIGUE CRACK PROPAGATION , 2008 .

[12] S. Tekeli,et al. Enhancement of fatigue strength of SAE 9245 steel by shot peening , 2002 .

[13] Y. Itoh,et al. Prediction of fatigue crack growth rate in welding residual stress field , 1989 .