Additive manufactured oxide-dispersion strengthened FeCrNi medium entropy alloy with superior mechanical properties

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2024-10-30 DOI:10.1016/j.intermet.2024.108532

Jian Wang , Bin Liu , Hui Zhou , Yuankui Cao , Qianli Huang , Bingfeng Wang , Jia Li , Qihong Fang , Ao Fu , Yong Liu

引用次数: 0

Abstract

In this work, an oxide-dispersion strengthened (ODS) FeCrNi medium entropy alloy (MEA) was prepared by low-energy ball milling and laser powder bed fusion (PBF-LB/M). The ODS FeCrNi MEA shows remarkable room-temperature tensile properties with yield strength of 878 MPa, ultimate tensile strength of 1070 MPa, and elongation of 30 %. Meanwhile, its high-temperature strength at 400 °C, 600 °C, and 700 °C exceeds many typical ODS alloys, such as PM 2000 and ODS 316. The ultra-fine cellular structures and uniformly dispersed nano-Y₂O₃ particles in the PBF-LB/M ODS FeCrNi MEA are the main reasons for its high strength. Additionally, the FCC-matrix with a high deformation capacity and the semi-coherent interface relationship between the FCC-matrix and the nano-Y₂O₃ particles ensure adequate plasticity.

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具有优异机械性能的添加剂制造氧化物分散强化铁铬镍中熵合金

本研究采用低能球磨和激光粉末床熔融（PBF-LB/M）技术制备了氧化物弥散强化（ODS）铁铬镍中熵合金（MEA）。ODS 铁铬镍中熵合金具有显著的室温拉伸性能，屈服强度为 878 兆帕，极限拉伸强度为 1070 兆帕，伸长率为 30%。同时，它在 400 ℃、600 ℃ 和 700 ℃ 的高温强度超过了许多典型的 ODS 合金，如 PM 2000 和 ODS 316。PBF-LB/M ODS 铁铬镍 MEA 中的超细蜂窝结构和均匀分散的纳米 Y2O3 颗粒是其具有高强度的主要原因。此外，具有高变形能力的 FCC 基质和 FCC 基质与纳米 Y2O3 颗粒之间的半相干界面关系也确保了足够的塑性。

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

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.