Relationship between Microstructure and Wear Behaviour in A356 Alloy and A356/Al2O3 and A356/WC Composites After Casting and Hot-Extrusion

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2024-08-13 DOI:10.1007/s12540-024-01775-w

P. A. Guerrero-Seañez, C. G. Garay-Reyes, L. D. Laguna-Zubia, M. A. Ruiz-Esparza-Rodríguez, J. M. Mendoza-Duarte, I. Estrada-Guel, A. Martínez-García, J. L. Hernández-Rivera, J. J. Cruz-Rivera, R. Martínez-Sánchez

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Abstract

The present study, with its practical implications, evaluates the relationship between microstructure and specific wear rate/friction coefficient in A356 alloy and A356/Al₂O₃ and A356/WC composites after casting and hot-extrusion. The characterization of crystalline phases was carried out using X-ray diffraction, and the microstructure was characterized by scanning electron microscopy. The comprehensive use of rotating (Pin-on-Disk) and linear reciprocating wear testers ensures a thorough understanding of the materials’ specific wear rate and friction coefficient behaviors. The results show a direct relationship between specific wear rate, friction coefficient, microstructure evolution, and hardness in the systems studied after casting and hot extrusion. In addition, the specific wear rate and friction coefficient decrease as the load increases during tests; however, the friction coefficient is more sensitive to hardness values at low loads; at as-cast conditions, this value decreases concerning the reference sample a 13% and 10% for the A356/Al₂O₃ and A356/WC composites, but at the extruded conditions, increases by 30% and 111%, which is in a direct relationship to values of hardness obtained.

Graphical Abstract

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A356 合金以及 A356/Al2O3 和 A356/WC 复合材料在铸造和热挤压后的微观结构与磨损行为之间的关系

本研究评估了 A356 合金以及 A356/Al2O3 和 A356/WC 复合材料在铸造和热挤压后的微观结构与特定磨损率/摩擦系数之间的关系，并提出了实际意义。结晶相的表征采用 X 射线衍射法，微观结构的表征采用扫描电子显微镜法。旋转式（盘针式）和直线往复式磨损试验机的综合使用确保了对材料比磨损率和摩擦系数行为的全面了解。结果表明，在所研究的铸造和热挤压系统中，比磨损率、摩擦系数、微观结构演变和硬度之间存在直接关系。此外，试验过程中，比磨损率和摩擦系数随着载荷的增加而降低；但是，在低载荷下，摩擦系数对硬度值更为敏感；在铸造条件下，A356/Al2O3 和 A356/WC 复合材料的摩擦系数比参考样品分别降低了 13% 和 10%，但在挤压条件下，摩擦系数分别增加了 30% 和 111%，这与获得的硬度值有直接关系。

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.