Effect of solidification modes on the shape memory effect of cast Fe-Mn-Si-Cr-Ni shape memory alloys

We investigated the microstructures and shape memory effect (SME) of cast Fe-Mn-Si-CrNi alloys with four solidification modes, i.e., austenitic, austenitic-ferritic, ferritic-austenitic, and ferritic modes. Ferritic-austenitic and ferritic modes introduced more stacking faults than austenitic and austenitic-ferritic ones, reducing stress-induced critical martensite stress. Thus, the former solidification modes displayed better SME than the latter solidification modes.& COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

This study investigated the microstructures and shape memory effect (SME) of cast Fe-Mn-Si-CrNi alloys with four solidification modes. Ferritic-austenitic and ferritic modes introduced more stacking faults, reducing stress-induced critical martensite stress. Thus, the former solidification modes displayed better SME than the latter solidification modes.