Comparison of effect of shot-peening with HFMI treatment or use of LTT consumables on fatigue strength of 1300 MPa yield strength steel weldments
| العنوان: | Comparison of effect of shot-peening with HFMI treatment or use of LTT consumables on fatigue strength of 1300 MPa yield strength steel weldments |
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| المؤلفون: | Harati, Ebrahim, 1986, Svensson, Lars-Erik, 1951, Karlsson, Leif, 1956 |
| المصدر: | Welding in the World. 64(7):1237-1244 |
| مصطلحات موضوعية: | Fatigue testing, Residual stresses, Shot peening, Welds, Yield stress, Compressive residual stress, Constant amplitude, Fatigue strength, Fully reversed, High frequency HF, Low transformation-temperature, Mechanical impacts, Steel weldments, Fatigue of materials, Production Technology, Produktionsteknik |
| الوصف: | In this paper, T-joint samples in a 1300Â MPa yield strength steel were produced using conventional or low transformation temperature (LTT) type consumables. The welded samples were either subjected to high-frequency mechanical impact (HFMI) treatment or to shot-peening. Fatigue testing was performed under fully reversed, constant amplitude bending load. Shot-peening gave a significant increase in fatigue strength for more than around 50,000Â cycles. Shot-peened LTT welds had the highest fatigue strength, with conventional welds being shot-peened having slightly lower fatigue strength. HFMI treatment of conventional and LTT welds improved the fatigue strength also, but to a lesser extent, keeping the slope in the SN diagram close to three, while shot-peened samples had a slope of 5â7. Significant differences in compressive residual stress were seen between the different welds, with the most compressive stress found in the shot-peened samples. This was probably one of the main reasons for the improved fatigue life of shot-peened samples. © 2020, The Author(s). |
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| URL الوصول: | https://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-15731 https://doi.org/10.1007/s40194-020-00917-z |
| قاعدة البيانات: | SwePub |
Find this article in full text from Springer Verlag. | تدمد: | 00432288 18786669 |
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| DOI: | 10.1007/s40194-020-00917-z |