Effect of mis-match ratio (MMR) on fatigue crack growth behaviour of HSLA steel welds |
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| Affiliation: | 1. Department of Manufacturing Engineering, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India;2. Department of Manufacturing Engineering, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India;3. Centre of Excellence for Advanced Materials, University of California at San Diego, La Jolla, CA 92093-0416, USA;1. School of Energy Systems, Lappeenranta University of Technology, P.O. Box 20, Lappeenranta 53851, Finland;2. Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia;1. School of Engineering & Information Technology, Sanskriti University, Mathura 281401, India;2. Sanskriti University, Mathura 281401, India;3. Department of Mechanical Engineering, GLA University, Mathura 281406, India;4. School of Engineering & Information Technology, Sanskriti University, Mathura 281401, India;1. Mechanical Engineering, College of Engineering and Informatics, NUI Galway, Ireland;2. Civil Engineering, College of Engineering and Informatics, NUI Galway, Ireland;3. Ryan Institute for Environmental, Marine and Energy Research, NUI Galway, Ireland;1. Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea;2. Steel Products Research Group 1, Technical Research Laboratories, POSCO, Pohang 790-785, Republic of Korea;3. Structural Research Group, Steel Solution Marketing Department, POSCO, Incheon 406-840, Republic of Korea |
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| Abstract: | Welding of High Strength Low Alloy Steels (HSLA) involves usage of low, even and high strength filler materials (electrodes) than the parent material depending on the application of the welded structures and the availability of the filler material. In the present investigation, the fatigue crack growth behaviour of under matched (UM), equal matched (EM) and over matched (OM) weld metals has been studied. The base material used in this investigation is HSLA-80 steel of weldable grade. Shielded Metal Arc Welding (SMAW) process has been used to fabricate the single “V” butt joints. Centre cracked tension (CCT) specimen has been used to evaluate the fatigue crack growth behaviour of the welded joints. Fatigue crack growth experiments have been conducted using servo hydraulic controlled fatigue testing machine at constant amplitude loading (R=0). Effect of mis-match ratio (MMR) on fatigue crack growth behaviour of HSLA steel welds has been analysed in detail. |
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