Characterization of the graded distribution of primary particles and wear behavior in the A390 alloy ring with various Mg contents fabricated by centrifugal casting |
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| Affiliation: | 1. School of Materials Science and Engineering and Center of Excellence for High Strength Alloys Technology, CEHSAT, Iran University of Science and Technology, IUST, Tehran, Iran;2. Department of Materials Science and Engineering, School of Engineering, Shiraz University, Zand Ave, Shiraz, Iran;3. Damavand Petrochemical, Phase 2, Pars Special Economic Energy Zone, Asaloye, Boshehr, Iran;1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2. Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, Hangzhou 310032, China;1. Dipartimento di Energia, Ingegneria dell’Informazione e Modelli Matematici (DEIM), Viale delle Scienze, 90128 Palermo, Italy;2. Dipartimento di Chimica, Università degli Studi di Milano, Via C. Golgi 19, 20133 Milano, Italy;1. Department of Metallurgical Engineering, PSG College of Technology, Coimbatore 641004, India;2. Department of Mechanical Engineering Amrita School of Engineering, Coimbatore 641112, India;1. School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran;2. Center of Excellence for High Strength Alloys Technology (CEHSAT), Tehran, Iran;3. Rubber Group, Iran Polymer & Petrochemical Institute, Nano and Smart Polymers Center of Excellence, Tehran-Karaj Hwy, Iran |
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| Abstract: | Three kinds of functionally graded rings using A390 as a base alloy and containing 0, 6 and 12 wt%Mg were prepared by centrifugal casting, and their microstructure and mechanical properties were investigated and compared. It is shown that the A390 ring without Mg content takes a characteristic of the primary Si particles distribution in the inner and outer layers. The 6%Mg ring reinforced by Si/Mg2Si particles has a different performance with its particles distribution only in the inner layer. Regarding the 12%Mg ring, the Mg2Si reinforced particle is distributed near the entire cross-section. It is demonstrated that the existence of the light in situ Mg2Si particles with lower density rather Al liquid makes changes to the gradient distribution of particles across the cross-section. Characteristics and distribution of the primary particles were assessed by the optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectrum (EDS) and image analyzer software. The hardness and wear rate along the thickness of samples were measured to investigate the variation in the mechanical properties corresponding to the variation in microstructure. Also, the worn surfaces of the material were examined by scanning electron microscopy (SEM) to study the dominant wear regime. |
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