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RISS 인기검색어
- 검색키워드
- 저자 : Karthik V. Shankar (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Morphological and Mechanical Behaviour of Cu–Sn Alloys—A review
M. Karthik,J. Abhinav,Karthik V. Shankar 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.7
The current paper reviews the research conducted on wrought Cu–Sn, Cu–Sn–Ti and Cu–Sn–Zn alloys intending to revealthe details on morphological and mechanical behaviour during various manufacturing operations. The motivational force ofemploying copper-based alloys in automotive and marine industries is its mechanical properties and corrosion resistance. One of the important factors that afect mechanical properties is micrograph. The grain size, grain distribution, heat treatment, morphological behaviour and the intermediate phase formation highly infuence the properties of the copper-basedalloys. Moreover, the change in microstructure through diferent manufacturing process (wrought process), heat treatmentand addition of alloying element also improve the mechanical and thermal properties. This paper aims to review the majorconclusions on improving the microstructure and mechanical behaviour of wrought Cu–Sn, Cu–Sn–Zn and Cu–Sn–Ti alloys. Analysis and observations of each investigation were prepared by incorporating the morphological results obtained throughOptical Microscope, Transmission Electron Microscope, Scanning Electron Microscope, X-ray Difraction Technique andElectron Dispersive Spectroscopy. This review paper also attempts to give the areas of future researches and developmentsthat can be made for these wrought alloys.
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Focused Review on Cu–Ni–Sn Spinodal Alloys: From Casting to Additive Manufacturing
Bipin Sankar,Chaitanya Vinay,Jithin Vishnu,Karthik V. Shankar,G. P. Gokul Krishna,V. Govind,A. J. Jayakrishna 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.5
The present review article evaluates the research and progress status of Cu–Ni–Sn-based spinodal alloys focussed on themethods and technologies implemented to enhance the properties of cast Cu–Ni–Sn alloys in industrial applications, particularlyin components such as bearings, bushings, propellers, and impellers that find extensive demand in the marineand automotive industry. The review introduces the limitations of employing copper-beryllium alloys in the industry anddiscusses how Cu–Ni–Sn alloys represent a potential alternative. Subsequently, a comprehensive overview of spinodaldecomposition is provided, considering the thermodynamic aspects and the Cu–Ni–Sn ternary phase diagram. The processingof Cu–Ni–Sn alloys via traditional casting is explored with an overview of various casting techniques and ensuingmicrostructure-property relationships. The two significant limitations, segregation during solidification and discontinuousprecipitation, are highlighted. Strategies to overcome these limitations, such as precipitation hardening, spinodal decomposition,thermo-mechanical processing, and composition design (with the effect of varying elemental additions), are furtherelaborated. The review summarises novel processing routes encompassing mechanical alloying, rapid solidification, powdermetallurgy, and spray deposition for developing spinodal Cu–Ni–Sn alloys. Finally, the progress in fabricating Cu–Ni–Snspinodal alloys using additive manufacturing techniques such as selective laser melting is highlighted. There are publishedreview papers on the wrought processing of Cu–Ni–Sn alloys, so this area has not been covered here. Overall, this reviewarticle is intended to streamline an overview of the characteristics and gradual developments from cast Cu–Ni–Sn spinodalalloys to additive manufacturing-based Cu–Ni–Sn spinodal alloys.
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Strontium in Al–Si–Mg Alloy: A Review
M. R. Sai Ganesh,Nikhil Reghunath,M. J.Levin,Adarsh Prasad,Sanapala Doondi,Karthik V. Shankar 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.1
The present article reviews the development of cast aluminium alloy with highlights on improvement in the morphological,mechanical, tribological, and ageing properties of Sr modifed Al–Si and Al–Si–Mg alloys. Aluminium and its alloys fndapplication in the automobile and aviation industries. The main objective of utilizing aluminium alloys for structural application, manufacturing of pistons and engine block for automobile industries is its lightweight and low density. However, thelow hardness of these alloys results in a high wear rate. The main factor that afects the properties of aluminium alloys isits microstructure, morphological behaviour, size of the grain and phase distribution. The morphological modifcation forthese alloys is done through diferent processing techniques like casting, heat treatment, solutionising, and alloying elementaddition which augments the mechanical, corrosion, and tribological behaviour of these alloys. Of the alloying elementadditions Sr has proved to a very efective modifer for the alloy, and hence the method of modifcation was studied in detail. The unwanted efects especially porosity, being one of the main factors for failure of components, were investigated andmethods to reduce it according to many researchers were included. Reinforcing the aluminium matrix with ceramic particlesand surface modifcation also enhances the properties of aluminium alloys. The current article reviews the recent techniquesto augment the microstructure, value of hardness, tensile properties, tribological properties, and corrosion behaviour of castAl–Si and Al–Si–Mg alloys by the addition of strontium. Moreover, this review also focuses on the future scope of thesealuminium alloys for structural application in automobile and lightweight industries.
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