爆炸加载下沉淀硬化高熵合金成型装药衬垫的异步变形行为

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2024-11-12 DOI:10.1016/j.intermet.2024.108555

Xutao Wang , Benpeng Wang , Xudong Liu , Tianxiang Li , Hanlin Zeng , Liang Wang , Ke Jin , Yunfei Xue

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引用次数: 0

摘要

沉淀硬化高熵合金（PHEAs）具有获得良好穿透深度和直径的潜力，因此有望成为异型装药衬里（SCLs）的候选材料。爆炸下的变形机制是指导合金微观结构、性能优化和异型装药设计的关键。本研究系统研究了爆炸加载下 PHEA SCL 的微观结构演变和变形机理。在爆炸加载下，α2 和 BCC 基体相均发生了动态再结晶，转变为细小的等轴晶粒（∼10 μm）。BCC 相的变形早于 α2 相，表现出明显的异步变形行为。这表明，α2 相能有效改善引爆时的抗变形能力，并进一步增大射流直径。此外，α2 相还能在爆炸条件下保留下来，从而延迟绝热剪切带的扩展，进一步改善射流的连续性。我们的研究结果为开发新的高性能合金及相关微结构优化提供了启示，可用于 SCL 的工程应用。

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Asynchronous deformation behavior of precipitation-hardened high-entropy alloys shaped charge liner under explosive loading

Precipitation-hardened high entropy alloys (PHEAs) are promising candidates for shaped charge liners (SCLs) due to their potential in obtaining good penetration depth and diameter. Deformation mechanism under explosive is the key to guiding the alloys microstructure, property optimization and shaped charge designing. In this study, the microstructural evolution and deformation mechanism of PHEA SCLs under explosive loading were systematically investigated. Under explosive loading, both the α₂ and BCC matrix phases underwent dynamic recrystallization, transforming into fine equiaxed grains (∼10 μm). The BCC phase deformed earlier than the α₂ phase, exhibiting a clearly asynchronous deformation behavior. This demonstrates that the α₂ phase can effectively improve the deformation resistance upon detonation and further increase jet diameter. Moreover, the α₂ can be retained under explosive conditions, which enables delaying the expansion of the adiabatic shear bands and further improving the jet continuity. Our results shed lights on developing new high-performance alloys and the related microstructure optimization for engineering applications in SCLs.

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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.