There is significant evidence from light metals that turbulence in casting leads to bifilm defects; enfolded, doubled-over oxide films which act like cracks the liquid, and are inherited as by solid. This population of introduced now known significantly influence tensile failure behaviour alloys. analogous defects exist steels. paper examines possibility bifilms may control hot ductility TWIP T...

Realizing high work hardening and thus elevated strength–ductility synergy are prerequisites for the practical usage of body-centered-cubic entropy alloys (BCC-HEAs). In this study, we report a novel dynamic strengthening mechanism, martensitic twinning transformation mechanism in metastable refractory element-based BCC-HEA (TiZrHf)87Ta13 (at.%) that can profoundly enhance capability, leading t...

Austenitic carbon steels that exhibit excellent mechanical properties due to the twinning-induced plasticity effect have been studied extensively. On the other hand, austenitic stainless steels usually achieve good strength and ductility via transformation-induced plasticity. However, relying on martensite transformation for strength may cause problems such as delayed cracking. Therefore, the t...

Twinning-induced plasticity (TWIP) steels have higher strength and ductility than conventional steels. Deformation mechanisms producing twins that prevent gliding stacking of dislocations cause a steel grades with the same strength. TWIP are considered to be within new generation advanced high-strength (AHSS). However, some aspects, such as corrosion resistance performance in service materials,...

In this study we developed a novel (TRIP+TWIP) high entropy alloy (HEA) with specific strength and large ductility. First, by controlling the atomic constitution of 3d transition metals (Cr, Mn, Fe, Co, Ni), designed light-weight TRIP-assisted dual-phase HEA non-equiatomic composition Cr22Mn6Fe40Co26Ni6, which exhibited 5% lighter density than Cantor HEA. Secondly, systematically added Al (a li...

The quantitative characterization of the microstructure evolution in high-Mn steel during deformation is of great importance to understanding its strain-hardening behavior. In the current study, in situ high-energy synchrotron X-ray diffraction was employed to characterize the microstructure evolution in a Fe-17Mn-1.5Al-0.3C steel during a tensile test. The microstructure at different engineeri...