Fatigue crack growth rates and fracture toughness in electroslag refined En 52 steel |
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Authors: | Mohan G Hebsur KP Abraham YVRK Prasad |
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Affiliation: | The authors are all with the Department of Metallurgy, Indian Institute of Science, Bangalore 560 012, India |
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Abstract: | En 52 steel has been electroslag refined and the resultant effects of refining on its mechanical properties have been assessed. It was found that refining caused a decrease in fatigue crack growth rates and increases in fatigue strength, fracture toughness, Charpy fracture energy and tensile ductility. Fatigue crack growth rates in region I and in region III were found to be considerably lower in the electroslag refined steel: they were unaffected in region II. The fracture toughness values for the electroslag refined steel are nearly twice those estimated for the unrefined steel. Measurements on heat-treated samples have shown that the electroslag refined steel has a better response to heat-treatment. The improvement in the mechanical properties is explained in terms of the removal of nonmetallic inclusions and a reduction in the sulphur content of the steel. |
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Keywords: | Enquiries should be addressed to Dr Prasad in the first instance |
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