The addition of aluminum to brittle martensitic steels in order to increase ductility by forming a grain boundary ferritic microfilm

Integrated Computing Accelerates Design and Performance Control of New Maraging Steels

“…Maraging steels are highly interesting due to their ultra-high strength [1][2][3][4][5][6][7], crucial in contemporary frontier technology fields such as aerospace, high-speed trains, deep-sea technology, advanced nuclear energy, and clean energy [8][9][10][11][12]. For example, Wuriti et al [13] investigated the M250 maraging steel pressure vessels for aerospace applications; Dehgahi et al [14] explored high strain-rate loadings performance of maraging steel parts in industries such as high-speed train; Jha et al [15] researched the failure analysis of M250 maraging steel in solid propulsion system.…”

The Role of an Al-induced Ferritic Microfilm in Martensitic Steels on the Hydrogen Embrittlement Mechanisms Revealed by Advanced Microscopic Characterization

“…The results show that the presence of the ferritic microfilm influences the mechanical behavior to a high extent. When tested in air, the ferritic microfilm increases the bulk ductility by over 100% when compared to samples with a similar hardness which do not contain such microfilm [1]. As shown in Figure 2 (left), fracture in air occurs at the ferritic microfilm which results in a fracture surface with microvoids dispersed over the underlaying martensitic microstructure.…”