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RISS 인기검색어
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- 저자 : Vaira Vignesh Ramalingam (검색결과 2 건)
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Research and Development in Magnesium Alloys for Industrial and Biomedical Applications: A Review
Vaira Vignesh Ramalingam,Padmanaban Ramasamy,Mohan Das Kovukkal,Govindaraju Myilsamy 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.4
The work reviews the research and development status of magnesium alloy, with more attention to the methodologies andtechnologies adopted to improve the properties of AZ91 alloy. The drive force of utilizing magnesium alloys for automotiveand biomedical application is light weightiness and biocompatibility respectively. However, the softness and high activityof magnesium alloys result in high wear and high corrosion rate respectively. One of the essential factors influencing theproperties of magnesium alloy is its microstructure. Consequently, the grain size, morphology and distribution of phaseconstituents influence the properties of magnesium alloys. The modification of microstructure through processing route (hotworking and cold working), heat treatment, and alloying elements improves the mechanical, corrosion, biocompatible, andtribological properties of magnesium alloys. Besides microstructural modification processes, addition of reinforcements,and coatings improves the properties of magnesium alloys. This article emphasis on the recent research on the technologiesto improve the microstructure, hardness, tensile strength, ductility, yield strength, wear resistance, and corrosion resistanceof magnesium alloy AZ91. Moreover, this review addresses the key issues hindering the applications of magnesium alloysfor structural and biomedical applications.
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Pavan Kalyan Kota,Govindaraju Myilsamy,Vaira Vignesh Ramalingam 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.6
Integration of two metallurgically distinct materials (bimetallic) is an inevitable advancement in the automotive andmarine field. In this context, this study investigates the fabrication, characterization, and properties of solid–liquid compoundcast aluminum alloy AA5052 and ferrous alloy (mild steel and galvanized iron) based bimetallic materials. Microstructuralevolution, microhardness, and tensile strength of the developed bimetallic material are investigated. The results show thatthe formation of cracks at the interface in AA5052/Mild Steel caused the joint failure in the course of preliminary testing. InAA5052/Galvanized Iron, the growth of intermetallics at the oxide-free steel surface results in a shear strength of 19.9 MPa. XRD analysis attests to the presence of brittle intermetallics and Al bond at the interface of AA5052/Galvanized Iron bimetallicmaterial, which in turn confirms the development of a metallurgical.
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