具有高密度纳米沉淀物的超强延展性Fe60Co20Ni15Mo5中熵合金

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL Intermetallics Pub Date : 2025-02-01 Epub Date: 2024-12-13 DOI:10.1016/j.intermet.2024.108606

Zhimin Yang , Shilin Feng , Chongxun Fang , Yongfu Cai , Zhenhua Han , Haimei Li , Ran Wei

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引用次数: 0

摘要

我们报道了一种新的沉淀强化Fe60Co20Ni15Mo5中熵合金（MEA）。具有单相BCC微观结构的MEA具有高达2.7 GPa的低温拉伸强度，超过了最先进的MEA和高强度合金。此外，采用反向工艺可以获得独特的双相结构，即高密度球形纳米沉淀物嵌入BCC基体中，而还原FCC相中存在少量纳米沉淀物。由于析出强化和相变诱导的塑性效应，双相MEA表现出优异的低温强度（~ 2.2 GPa）和延性（~ 20%）组合。

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Ultrastrong and ductile Fe60Co20Ni15Mo5 medium-entropy alloy with high density nanoprecipitates

We report a novel precipitation-strengthened Fe₆₀Co₂₀Ni₁₅Mo₅ medium entropy alloy (MEA). The MEA with single-phase BCC microstructure exhibits a high cryogenic tensile strength of ∼2.7 GPa, surpassing the state-of-the-art MEAs and high strength alloys. Besides, a unique dual-phase structure can be obtained by using the reverse process, that is, high-density spherical nanoprecipitates embedded within a BCC matrix and a minor presence of nanoprecipitates within the reverted FCC phase. Due to precipitation strengthening and transformation-induced plasticity effect, the dual-phase MEA exhibits outstanding cryogenic strength (∼2.2 GPa) and ductility (∼20 %) combinations.

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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.