http://localhost:8080/xmlui/handle/123456789/223 2012 Publications 2026-04-15T19:48:33Z http://localhost:8080/xmlui/handle/123456789/2536 Hot Tearing Susceptibility of Magnesium–Gadolinium Binary Alloys Srinivasan, Amirthalingam; Zhi Wang; Yuanding Huang; Felix Beckmann; Karl Ulrich Kainer; Norbert Hort Hot tearing susceptibility of Mg–Gd alloys are investigated using instrumented constrained rod casting (CRC) apparatus, and found that the susceptibility increases with increase in Gd content, and reaches a maximum at 2 % after which it decreases to a minimum with 10 % Gd. The high susceptibility observed with 2 % Gd is due to its columnar structure and low amount of eutectic liquid at the time of cracking, whereas equiaxed grain and high liquid content which facilitates crack healing are the reasons for the low susceptibility of Mg–10 Gd alloy 2012-12-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2519 Erratum to: Corynebacterium Glutamicum as a Potent Biocatalyst for the Bioconversion of Pentose Sugars to Value-Added Products Vipin Gopinath; Anusree Murali; Dhar Kiran, S; Nampoothiri, K M 2012-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2518 Effect of Mg on Solidification Microstructures of Homogenous and Functionally Graded A390 Aluminum Alloys Jayakumar, E; Rajan, T P D; Pai, B C Hypereutectic Al–Si alloys are used in components that require high resistance wear and corrosion, good mechanical properties, low thermal expansion and less density. The size and morphology of hard primary silicon particles present in Al–Si alloys greatly influences the mechanical properties. Addition of Mg leads to formation of intermetallic Mg2Si phases, which contributes towards the properties of high silicon alloy as well as alters the nature and quantity of primary silicon formed. The high silicon alloy subjected to centrifugal casting leads to the formation of functionally gradient material, which provides variation in spatial and continuous distribution of primary phases in a definite direction exhibiting selective properties and functions within a component. The present study is to evaluate the effect of Mg on solidification microstructures of homogenous and functionally graded A390 aluminium alloys. The addition of Mg from 3 to 5 % in A390 alloy using Al–20Mg master alloy has shown a transformation from primary silicon rich matrix to Mg2Si rich matrix. Centrifugal casting shows the gradient distribution of primary silicon and Mg2Si phases towards the inner periphery of the casting 2012-10-10T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2516 Developments in Solidification Processing of Functionally Graded Aluminium Alloys and Composites by Centrifugal Casting Technique Rajan, T P D; Jayakumar, E; Pai, B C Centrifugal casting is one of the potential solidification processing techniques used for producing near-net shaped symmetrical cast components with improved properties. The emergence of new class of functionally graded materials has propelled this technique for the fabrication of engineering components and structures with graded property. The specific properties obtained by the use of functionally graded metal matrix composites (FGMMC) are high temperature surface wear resistance, surface friction and thermal properties, adjustable thermal mismatching, reduced interfacial stresses, increased adhesion at metal–ceramic interface, minimized thermal stresses and increased fracture toughness and crack retardation. Among various processing techniques available for the fabrication of FGMMC, centrifugal casting hasemerged as the simplest and cost effective technique for producing large size engineering components of FGMMC. The present paper gives an overview on the developments in use of centrifugal processing technique for processing various functionally graded aluminium alloys and composites. The influence of various process and solidification parameters on microstructure and properties of graded alloys and composites are described 2012-09-11T00:00:00Z