TY  - JOUR
AU  - Teshome, Fissha Biruke
AU  - Zhao, Miao
AU  - Shen, Jiajia
AU  - Oliveira, J. P.
AU  - Long, Chen
AU  - Li, Jian
AU  - Peng, Bei
AU  - Schell, N.
AU  - Zeng, Zhi
TI  - Tailoring σ-phase precipitation for enhanced strength-plasticity in arc-based direct energy-deposited FeCoCrNiMnMo high-entropy alloy
JO  - Scripta materialia
VL  - 268
SN  - 1359-6462
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - PUBDB-2025-02504
SP  - 116894
PY  - 2025
N1  - Waiting for fulltext 
AB  - High-entropy alloys (HEAs) are novel materials with outstanding properties, showing potential for advancedengineering applications. Recent advancements in HEA design are complemented by studies correlating fabricationtechniques to their performance. This study introduces the pioneering use of an ultra-high-frequencypulsed current (UHFPC) TIG heat source in directed energy deposition (DED) with dual alloy-wires for thefabrication of non-equiatomic FeCoCrNiMnMo HEAs. A comprehensive evaluation of the microstructural andmechanical behavior of as-deposited and heat-treated material, guided by CALPHAD methods, is presented. Theuse of UHFPC significantly refined the microstructure and promoted homogeneity, enabling the formation of aductile FCC matrix in the as-deposited state. Subsequent heat-treatment induced recrystallization and σ-phaseprecipitation at the grain boundaries, enhancing strength via dislocation-precipitation strengthening synergy.The CALPHAD-informed heat-treatment led to  44.2 
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1016/j.scriptamat.2025.116894
UR  - https://bib-pubdb1.desy.de/record/634424
ER  -