Journal Article

PUBDB-2025-02516

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Temperature-dependent deformation behavior of the additively manufactured Al$_{0.75}$CrFeNi$_{2.1}$ alloy using in-situ high energy X-ray diffraction

Cazic, I. (Corresponding author)Extern* ; Barriobero-Vila, P. ; Navaeilavasani, N.Extern* ; Stark, A.Extern*Hereon* ; Schell, N.HZG*Hereon* ; Ghanbaja, J. ; Anvari, P. ; Hecht, U.Extern*

2025
Elsevier Lausanne

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Please use a persistent id in citations: doi:10.1016/j.jallcom.2025.182596

Abstract: Laser powder bed fusion of the hypo-eutectic eutectic alloy Al$_{0.75}$CrFeNi$_{2.1}$ conveniently produces an ultrafine quasi-lamellar microstructure composed of fcc and bcc phases. This is achieved by annealing the as-built and almost fully fcc microstructure, which has been published previously. In this study, two different annealing treatments were carried out, i.e. at 900 °C and 1000 °C for 6 h. The samples were compressed at temperatures up to 800 °C using in-situ high energy synchrotron X-ray diffraction (HEXRD). This technique provides studying macroscopic and phase-specific stress-strain evolution and therefore more insight into the stress partitioning as a function of test temperature between fcc A1 and bcc ordered B2. This analysis shows that below 400°C B2 is the major contributor to hardening, while above 600°C A1 contributes more, suggesting the softening of B2. The ultra-fine quasi-lamellar structure with confined B2 lamellae induces remarkably high dislocation density and hardening, as well as co-deformation of both phases. The dislocation density evolution was used to describe the macroscopic flow stress-strain using a phase fraction-weighted Taylor equation. The temperature capability of the novel material was compared with established materials and bridges the gap between steels and Ni-based alloys for applications up to 650 °C.

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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)
2. FS-Proposal: I-20221372 EC (I-20221372-EC) (I-20221372-EC)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; Clarivate Analytics Master Journal List ; 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

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