Journal Article

PUBDB-2025-02504

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tailoring σ-phase precipitation for enhanced strength-plasticity in arc-based direct energy-deposited FeCoCrNiMnMo high-entropy alloy

Teshome, F. B. ; Zhao, M. ; Shen, J.Extern* ; Oliveira, J. P.Extern* ; Long, C. ; Li, J.Extern* ; Peng, B. ; Schell, N.HZG*Hereon* ; Zeng, Z. (Corresponding author)CFEL*MPG*Extern*

2025
Elsevier Science Amsterdam [u.a.]

This record in other databases:  

Please use a persistent id in citations: doi:10.1016/j.scriptamat.2025.116894

Abstract: 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 % and ~33.4 % increase in yield and ultimate tensilestrength, respectively, while preserving superior elongation (~58 %), underscoring the potential of TIG-based-DED to fabricate HEA parts for advanced applications.

Note: Waiting for fulltext

---

Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. Helmholtz-Zentrum Hereon (Hereon)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2025

---

Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---