Co-introduction of precipitate hardening and TRIP in a TWIP high-entropy alloy using friction stir alloying.

ABSTRACT: Tuning deformation mechanisms is imperative to overcome the well-known strength-ductility paradigm. Twinning-induced plasticity (TWIP), transformation-induced plasticity (TRIP) and precipitate hardening have been investigated separately and have been altered to achieve exceptional strength or ductility in several alloy systems. In this study, we use a novel solid-state alloying method-friction stir alloying (FSA)-to tune the microstructure, and a composition of a TWIP high-entropy alloy by adding Ti, and thus activating site-specific deformation mechanisms that occur concomitantly in a single alloy. During the FSA process, grains of the as-cast face-centered cubic matrix were refined by high-temperature severe plastic deformation and, subsequently, a new alloy composition was obtained by d

SUBMITTER: Wang T 

PROVIDER: S-EPMC7810985 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature