加载方向对快速成型 M350 马氏体时效钢-Al0.5 钴铬铁镍 1.5 混合板材动态冲击响应的影响

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2024-11-14 DOI:10.1016/j.msea.2024.147541

T.N. Odiaka , G. Asala , O.T. Ola , O.A. Ojo , I.N.A. Oguocha , A.G. Odeshi

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引用次数: 0

摘要

尽管马氏体时效钢的冲击强度令人印象深刻，这也是其在国防工业中应用的基础，但在承受动态载荷时，它们极易因绝热剪切带（ASB）成核而开裂。因此，需要一种潜在的解决方案来缓解这一问题。在本研究中，使用基于激光的定向能沉积（L-DED）增材制造技术制造了一种包含 M350 马氏体时效钢和 Al0.5CoCrFeNi1.5 高熵合金层的混合板，旨在将 M350 马氏体时效钢的高冲击强度与 Al0.5CoCrFeNi1.5 的延展性和抗 ASB 性能结合起来。为了确定加载方向对混合试样冲击强度和吸收能量的影响，从混合板上切割出圆柱形试样，试样层的方向与圆柱轴线呈纵向和横向。使用带仪器的分体式霍普金森压力棒（SHPB）进行高应变速率测试，以确定试样的动态机械响应。使用广义相加模型（GAM）对结果进行的统计分析显示，相对于冲击方向的层取向会显著影响混合试样的冲击强度和吸收能量。纵向取向试样在所有测试的冲击力矩下都表现出优异的冲击强度。然而，横向取向的试样在 32.8 kg ms-1 的冲击动量下吸收的能量更高。混合试样中的 Al0.5CoCrFeNi1.5 层在能量吸收、应变硬化和抑制 ASB 扩展方面做出了重大贡献。

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The effects of loading direction on the dynamic impact response of additively manufactured M350 maraging steel-Al0.5CoCrFeNi1.5 hybrid plates

Despite the impressive impact strength of maraging steels, which informs their application in the defence industry, they are highly susceptible to cracking resulting from adiabatic shear band (ASB) nucleation when subjected to dynamic loading. Hence, a potential solution to mitigate this problem is needed. In this study, a hybrid plate containing layers of M350 maraging steel and Al_0.5CoCrFeNi_1.5 high entropy alloy was fabricated using laser-based directed energy deposition (L-DED) additive manufacturing with the aim of combining the high impact strength of M350 maraging steel with the ductility and ASB-resistant properties of Al_0.5CoCrFeNi_1.5. To determine the effect of loading direction on the impact strength and absorbed energy of the hybrid specimens, cylindrical specimens, with the layers oriented longitudinally and transversely to the cylinder's axis, were cut out of the hybrid plate. High-strain rate testing was performed using an instrumented split-Hopkinson pressure bar (SHPB) to determine the dynamic mechanical response of the specimens. Statistical analyses of the results using generalised additive models (GAM) showed that layer orientation with respect to the direction of impact significantly affects the hybrid specimens' impact strength and absorbed energy. The longitudinally oriented specimens demonstrated superior impact strength across all tested impact momenta. However, the transversely oriented specimens showed higher absorbed energy up to an impact momentum of 32.8 kg ms⁻¹. The Al_0.5CoCrFeNi_1.5 layer contributed significantly to energy absorption, strain hardening, and the inhibition of ASB propagation in the hybrid specimens.

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.