Remarkable Cryogenic Strength and Ductility of AISI 904L Superaustenitic Stainless Steel: A Comparative Study.

Microstructural evolutions and cryogenic mechanical properties of AISI 904L superaustenitic stainless steel were studied for the first time and compared with those of metastable AISI 304L and 316L austenitic stainless steels. The temperature-dependencies of these properties were critically discussed and correlated to the microstructures, focusing on the solid solution strengthening, transformation-induced plasticity (TRIP), and twinning-induced plasticity (TWIP) effects. The 904L alloy showed an extraordinary cryogenic strength-ductility synergy with excellent work-hardening behavior. [ABSTRACT FROM AUTHOR]