Author : Harish.A 1
Date of Publication :12th May 2017
Abstract: A dissimilar welded joint finds its prominence in high temperature applications and has better corrosion resistance. Whereas the welding process induces residual tensile stresses that are detrimental to fatigue life. Tensile stresses act to stretch or pull apart the surface of the material. With enough load cycles at a high enough tensile stress, a crack is initiated. Significant improvement in fatigue life can be obtained by modifying the residual stress level in the material. The intent of this project is to measure fatigue life and surface hardness of butt welded joint with dissimilar materials. The surface modification method employed is shot peening method which is simple, yet effective to improve the fatigue life of the joint. In this study an investigation is carried out into the effect of shot peening upon improvement in the fatigue strength and hardness of the welded joint.
- Mark S. Molzen and Doug Hornbach, Evaluation of Welding Residual Stress Levels Through Shot Peening and Heat Treating.
- Sylvain Chataigner, Lamine Dieng, Kevin Guit and Michel Grasset, Improving welded joint fatigue life using shot peening or grinding, France, Jan 2013.
- M Hasegawa and H Suzuki, Improvement of the fatigue strength of aluminum alloy welded joints by high hardness and large specific gravity shot peening, Welding International, Volume 19, 2010.
- Manoj Saini, Navneet Arora, Chandan Pandey and Husain Mehdi, Mechanical properties of bimetallic weld joint between sa 516 grade 65 carbon steel and SS 304 l for steam generator application, 2014.
- Xiaohua Cheng1, Henry J. Prask, Thomas Gnaeupel Herold, Vladimir Luzin4, and John W. Fisher, Neutron Diffraction Measurements for Residual Stresses in AL-6XN Stainless Steel Welded Beams.
- M.H. (Johnny) Johnson, Fatigue life improvement Techniques for welds, Process Barron Alabama.
- Vinod M. Bansode and N. D. Misal, Fatigue life estimation of a butt welded joint by s-n approach, College of Engineering, Pandharpur, India, 2012.
- Baptista R., Infante V., and Branco C.M., Experimental and Numerical Analysis of Fatigue Life Improvement Techniques in Welded Joints of Stainless Steels, Lisbon, Portugal.