Temperature-dependent deformation behavior of the additively manufactured Al0.75CrFeNi2.1 alloy using in-situ high energy X-ray diffraction
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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BibTeX
@article{cazic2026temperaturedependent,
title = {{Temperature-dependent deformation behavior of the additively manufactured Al0.75CrFeNi2.1 alloy using in-situ high energy X-ray diffraction}},
author = {I. Cazic and P. Barriobero-Vila and N. Navaeilavasani and A. Stark and N. Schell and J. Ghanbaja and P. Anvari and U. Hecht},
journal = {Journal of Alloys and Compounds},
year = {2026},
month = oct,
doi = {10.1016/j.jallcom.2025.182596},
url = {https://hal.science/hal-05792333v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Temperature-dependent deformation behavior of the additively manufactured Al0.75CrFeNi2.1 alloy using in-situ high energy X-ray diffraction
AU - I. Cazic
AU - P. Barriobero-Vila
AU - N. Navaeilavasani
AU - A. Stark
AU - N. Schell
AU - J. Ghanbaja
AU - P. Anvari
AU - U. Hecht
PY - 2026
DA - 2026/10/11
JO - Journal of Alloys and Compounds
DO - 10.1016/j.jallcom.2025.182596
UR - https://hal.science/hal-05792333v1
AB - 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.
SN - 0925-8388
ER -