Additively manufactured FeCoNiSi0.2 alloy with excellent soft magnetic and mechanical properties through texture engineering

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-21 DOI:10.1016/j.jmrt.2024.09.171

Yang Yang , Tianhai Liao , Yiwang Jia , Guodong Ding , Jiangping Cao , Xiaojuan Shang , Yaxiong Guo , Qibin Liu

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引用次数: 0

Abstract

High-entropy alloys are widely used as structural materials and hold potential as functional materials. This study aims to develop a soft magnetic medium entropy alloy FeCoNiSi_0.2 (Si_0.2 MEA) with excellent soft magnetic properties and higher ductility using additive manufacturing technology. The microstructure of Si_0.2 MEA is characterized by texture and large grains, with a single FCC phase structure. The texture strength of MEA initially increases and then decreases with the addition of Si, with Si_0.1 MEA exhibiting the strongest fiber texture. Among the four FeCoNiSi_x MEAs, Si_0.2 MEA demonstrates the best tensile properties (i.e. δ ∼39 %, σ_0.2–287 MPA, σ_b∼551 MPa). The correlation generalized stacking fault energy calculation model indicates that Si_0.2 MEA has the lowest generalized stacking fault energy (∼7 mJ/m²), suggesting superior ductility. The synergistic effect of texture and large grains promotes the formation of a magnetization “easy axis”, which makes Si_0.2 MEA exhibit the best soft magnetic properties (M_s:150emu/g, H_c:1.04Oe). These results provide a new paradigm for developing laser additively manufactured soft magnetic medium entropy alloy.

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通过质构工程快速制造出具有优异软磁和机械性能的 FeCoNiSi0.2 合金

高熵合金被广泛用作结构材料，并具有作为功能材料的潜力。本研究旨在利用快速成型技术开发一种具有优异软磁性能和更高延展性的软磁中熵合金 FeCoNiSi0.2 (Si0.2 MEA)。Si0.2 MEA 的微观结构以纹理和大晶粒为特征，具有单 FCC 相结构。MEA 的纹理强度最初随着 Si 的添加而增加，然后降低，其中 Si0.1 MEA 的纤维纹理强度最高。在四种 FeCoNiSix MEA 中，Si0.2 MEA 的拉伸性能最好（即 δ∼39 %，σ0.2-287 MPA，σb∼551 MPa）。相关的广义堆积断层能计算模型表明，Si0.2 MEA 的广义堆积断层能最低（∼7 mJ/m2），这表明其延展性更好。纹理和大晶粒的协同作用促进了磁化 "易轴 "的形成，从而使 Si0.2 MEA 表现出最佳的软磁特性（Ms:150emu/g，Hc:1.04Oe）。这些结果为开发激光添加制造的软磁中熵合金提供了新的范例。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys

CiteScore

8.80

自引率

9.40%

发文量

1877

审稿时长

35 days

期刊介绍： The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.