Austenitic stainless steels (ASS) have good ductility and toughness but low yield strength. In order to save material and realize lightweight of pressure vessels, the cold stretching technology can be used to enhance ASS’s yield strength. Based on the control of different strain, the material parameters of strength, ductility and volume fraction of strain-induced martensite (SIM) were obtained. The results show that cold stretching can significantly improve ASS’s yield strength and have minor effect on material’s plasticity and content of SIM. The ASS still maintain enough plastic margin after cold stretching and thus can substantially reduce the wall thickness of vessel. In the quasi-static conditions, the mechanical parameters are not sensitive to strain rate. However, too small strain rate will lead to occurrence of serrated yielding, which is called Portevin-Le Chatelier (PLC) effect. The conclusions for the cold stretching in pressure vessel provide theoretic basis reference for engineering applications.

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