MICROSTRUCTURE AND FATIGUE PROPERTIES OF A WELDED DUPLEX STAINLESS STEEL |
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| Authors: | S Beretta M Boniardi |
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| Affiliation: | Politecnico di Milano, Dipartimento di Meccanica, Piazza Leonardo da Vinci 32, 20133 Milano, Italy |
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| Abstract: | Abstract— In response to the increasing structural applications in duplex steels for welded structures, fatigue behaviour of a SAF 2304 grade duplex stainless steel was investigated, considering both the base metal and GTAW welded joints. Fatigue curves and fatigue limits under rotary bending fatigue were obtained. The study focused attention on the microstructural features of fatigue crack propagation of the two series of experiments, thereby permitting an evaluation of the tortuous crack path of welded joints and the mechanisms related to threshold microstructural barriers. |
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| Keywords: | Welded joints Stainless (duplex) steel Rotary bending fatigue limits Microstructural barriers Crack propagation modes |
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