Microstructure and Physical Properties of Nonmagnesium and Magnesium-Based High-Entropy Alloys: A Comparison Study

IF 0.6 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Performance and Characterization Pub Date : 2023-09-18 DOI:10.1520/mpc20230015

Kiran Kumar Karnati, Eshwaraiah Punna, Prasad V. G. V. A. Somarouthu, Balaji Rao Ravuri

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Abstract

In this investigation, (Ti-Mo-Zr)60Co20Cr20, (Ti-Mo-Zr)60Al30Si10 (non-magnesium-based), and (Ti-Mo-Zr)60Cu10Mg30 (magnesium-based) high-entropy alloy (HEA) samples are prepared via mechanical milling and then by spark plasma sintering technique. The microstructure morphology is examined using x-ray diffraction and scanning electron microscopy with energy-dispersive x-ray spectroscopy. The microstructure reveals that there would be a strong correlation between phase structure and sustainability for localized corrosion behavior. The lowest crystallite size of the magnesium-based HEA powder mixture suggests the highest corrosion resistance because of the solid-solution face-centered cubic and body-centered cubic phases for 20 h of milling. The correlation between the microstructural morphology and functional properties such as hardness, corrosion resistance, and potentiodynamic parameters are compared for both magnesium-based and non-magnesium-based HEAs and analyzed to elucidate their suitability for lightweight vehicle applications.

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非镁基与镁基高熵合金的组织与物理性能比较研究

采用机械铣削和火花等离子烧结法制备(Ti-Mo-Zr)60Co20Cr20、(Ti-Mo-Zr)60Al30Si10(非镁基)和(Ti-Mo-Zr)60Cu10Mg30(镁基)高熵合金(HEA)样品。利用x射线衍射和扫描电子显微镜及能量色散x射线光谱学对其微观形貌进行了研究。微观结构表明，相结构与局部腐蚀行为的可持续性之间存在很强的相关性。晶粒尺寸最小的镁基HEA粉末混合物具有最高的耐蚀性，这是由于在磨矿20 h时，固溶面心立方相和体心立方相的存在。比较了镁基HEAs和非镁基HEAs的显微组织形态与硬度、耐蚀性和动电位参数等功能性能之间的相关性，并分析了它们在轻量化汽车应用中的适用性。

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来源期刊

Materials Performance and Characterization MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

2.20

自引率

9.10%

发文量

期刊介绍： The journal is published continuously in one annual issue online. Papers are published online as they are approved and edited. Special Issues may also be published on specific topics of interest to our readers. Materials Performance and Characterization provides high-quality papers on both the theoretical and practical aspects of the processing, structure, properties, and performance of materials used in: -mechanical -transportation -aerospace -energy and -medical devices. -Materials Covered: (but not limited to) -Metals and alloys -Glass and ceramics -Polymers -Composite materials -Textiles and nanomaterials