Effects of Heat Treatment on the Microstructure and Mechanical Properties of a Dual-Phase High-Entropy Alloy Fabricated via Selective Laser Melting

• DOI: 10.20944/preprints202402.0402.v1
• Publication Date: 2024-02-08T03:40:08Z
• Authors: Xiaojun Tan; Zihong Wang; Haitao Chen; Xuyun Peng; Wei Zhang; Haibing Xiao; Zhongmin Liu; Yu Hu; Liang Guo; Qingmao Zhang
• Keywords: Selective Laser Melting; Ductility (Earth science); High-Entropy Alloys; Elongation; Heat treating

To enhance the applicability of dual-phase high-entropy alloys (HEAs) like Fe32Cr33Ni29Al3Ti3, fabricated via selective laser melting (SLM), a focus on improving their mechanical properties is essential. As part this effort, heat treatment was explored. This study compares microstructure and as-printed sample with those cooled in water after undergoing at temperatures ranging from 1000 to 1200 ℃ for 1 hour. Both pre- post-treatment samples reveal comprising FCC BCC phases. Although led reduction tensile yield strength, it significantly increased ductility compared sample. strength-ductility trade-off related changes grain sizes ultrafine grains enhancing strength micron optimizing ductility, also influence content FCC/BCC phases dislocation density. In particular, heat-treated °C hour then water-cooled exhibited better combination 790 MPa, an elongation 13%. research offers innovative perspectives crafting HEA allowing tailorable through synergistic approach involving SLM treatment.