Microstructure and Mechanical Properties of Dual‐Phase FeCoCrNiAl0.6 High Entropy Alloys Prepared by Laser Directed Energy Deposition DOI

Yongping Liang,

Yajie Dou,

Chaoyue Chen

et al.

Advanced Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 4, 2025

Recently, dual‐phase high‐entropy alloys with excellent strength–ductility combination have attracted widespread attention in the scientific community. Herein, three dense and crack‐free FeCoCrNiAl 0.6 high entropy (HEAs) were successfully prepared by laser directed energy deposition (LDED) via adjusting scanning speed. The printed formed fine columnar face‐centered cubic (FCC) dendrites woven mesh body‐centered (BCC) interdendrites. BCC phase is further composed of nanoscale A2 B2 phases spinodal decomposition. As speed increased from 5 mm s −1 to 9 , fraction FCC 56.9 70.5%, size refined. sample at an average grain 3.9 μm showed a comprehensive mechanical property, namely, yield stress ultimate tensile (712.0 1121.9 MPa) total elongation 16.5%. fracture surface changed cleavage‐type facet ductile dimples as increased. Based on microstructures base materials, it can be concluded that microstructure soft prevent initiation propagation microcracks and, thereafter, alleviate brittle failure.

Language: Английский

Exploring mechanical response and fatigue properties of laser powdered-bed fusion IN718 superalloy: Crystal plasticity modeling and defect-based life prediction DOI
Asif Mahmood,

Chuanwen Sun,

Wei Li

et al.

Engineering Failure Analysis, Journal Year: 2025, Volume and Issue: unknown, P. 109601 - 109601

Published: April 1, 2025

Language: Английский

Citations

0
Microstructure and Mechanical Properties of Dual‐Phase FeCoCrNiAl0.6 High Entropy Alloys Prepared by Laser Directed Energy Deposition DOI

Yongping Liang,

Yajie Dou,

Chaoyue Chen

et al.

Advanced Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 4, 2025

Recently, dual‐phase high‐entropy alloys with excellent strength–ductility combination have attracted widespread attention in the scientific community. Herein, three dense and crack‐free FeCoCrNiAl 0.6 high entropy (HEAs) were successfully prepared by laser directed energy deposition (LDED) via adjusting scanning speed. The printed formed fine columnar face‐centered cubic (FCC) dendrites woven mesh body‐centered (BCC) interdendrites. BCC phase is further composed of nanoscale A2 B2 phases spinodal decomposition. As speed increased from 5 mm s −1 to 9 , fraction FCC 56.9 70.5%, size refined. sample at an average grain 3.9 μm showed a comprehensive mechanical property, namely, yield stress ultimate tensile (712.0 1121.9 MPa) total elongation 16.5%. fracture surface changed cleavage‐type facet ductile dimples as increased. Based on microstructures base materials, it can be concluded that microstructure soft prevent initiation propagation microcracks and, thereafter, alleviate brittle failure.

Language: Английский

Citations

0