S.S. Dash , L. Lang , J. Agyapong , S. Yang , X. Shang , M. Li , W. Wang , M. Gorban , T. Filleter , D.L. Chen , S. Boakye-Yiadom , Y. Zou
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引用次数: 0
Abstract
Eutectic high entropy alloys (EHEAs) typically consist of two phases with distinct structures and properties, for example, soft and hard phases that deform heterogeneously. In this study, we report the deformation and failure phenomena in a near-EHEA (AlCoFeNi2) with face-centered cubic (FCC) and ordered body-centered cubic (B2) phases under high strain rate impacts (up to ∼7 × 103 s-1). We find that such EHEA undergoes localized softening via the shear rupture of the brittle B2 phase, leading to high plastic strains at failures. Moreover, a majority of cracks initiate along cumulative wavy-slip traces within the B2 grains due to strain localizations. This study improves the understanding of the deformation and fracture mechanisms of EHEAs under dynamic impact conditions.
期刊介绍：
Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.
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