Optimizing strength and minimizing anisotropy in Fe-Cr-Al-Nb alloys via Fe2Nb particles

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2025-03-15 DOI:10.1016/j.intermet.2025.108741

Mingyu Fan , Ye Cui , Xue Cao , Wenqing Jiang , Naimeng Liu , Yang Zhang , Yanzhuo Xue , Xun-Li Wang , Zhongwu Zhang

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引用次数: 0

Abstract

Controlling the texture and grain size of Fe-Cr-Al alloys is essential for enhancing mechanical properties. Here, the effect of Nb on the texture evolution and the anisotropy of mechanical properties in Fe-Cr-Al alloys were investigated. Compared to the annealed Fe-Cr-Al alloy, the yield strength of the annealed Fe-Cr-Al-Nb alloy increased from 430 MPa to 540 MPa with nearly identical rolling and transverse tensile yield strengths. Transmission electron microscope results indicate that the Nb could form Fe₂Nb particles with an average radius of 50 nm in matrix of the annealed Fe-Cr-Al-Nb alloy. The electron backscatter diffraction results indicate that the grains of the Fe-Cr-Al-Nb alloy are significantly refined by Fe₂Nb particles, and the α-fiber and γ-fiber textures are weakened, promoting texture randomization. The strengthening calculations indicate that compared to annealed Fe-Cr-Al alloys, the increase in the yield strength of the annealed Fe-Cr-Al-Nb alloy is attributed, in sequence, to dislocation strengthening, Orowan strengthening by particles and grain boundary strengthening. As a result, the annealed Fe-Cr-Al-Nb alloy achieves an increase in yield strength while reducing anisotropy. This finding provides insights for the development of Fe-Cr-Al alloys.

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通过 Fe2Nb 粒子优化 Fe-Cr-Al-Nb 合金的强度并最小化各向异性

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.