Strain-rate dependent deformation behavior of additively manufactured stainless steel with different fractions of δ-ferrite

The effect of strain rate on the tensile deformation behavior additively manufactured CrNi stainless steel with different fractions δ-ferrite (14 % in as-built material and 6 after post-built solid-solution treatment) was revealed focus stage macroscopic strain-induced γ → α' martensitic transformation. Tension tests were performed initial rates 5 ×10−4, ×10−3, ×10−2 s−1 at two temperatures, which slow (300 K) fast (183 kinetics transformation realized. Post-built treatment provided a partial dissolution specimens assisted higher hardening associated Independently fraction test temperature, an increase weakly influences stress strain, starts, but visibly decreases this stage. latter testifies slower rates.