| Abstract Scope |
By combining the mechanical properties of different steels, multilayered stainless-steel composites (MSCs) offer a way to overcome the strength and ductility tradeoff encountered in metallurgy, opening possibilities to design thinner, lighter and more sustainable parts. In this study, crack propagation and fracture behavior have been characterized in a martensitic/austenitic MSC having a high combination of strength and toughness. Crack propagation tests were carried out at 293 K and 77 K to assess the toughness of this material at room and cryogenic temperatures. The results showed that the investigated MSC has a significantly higher yield strength than the austenitic steel used, and that its toughness is considerably improved compared with martensitic steel. In particular, a beneficial crack arrest and deflection effect has been observed at 77 K, making the use of this material an interesting possibility to increase the sustainability of various industrial applications, such as liquified gas transportation and storage. |