Microstructural length scale manipulation via solidification and its influence on mechanical behavior in a high-strength intermetallic-based eutectic alloy

Sharma, A and Tiwary, CS and Banerjee, D (2024) Microstructural length scale manipulation via solidification and its influence on mechanical behavior in a high-strength intermetallic-based eutectic alloy. In: Journal of Materials Science .

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Abstract

The present manuscript investigates the yield-strength dependence on the microstructural length scale and solidification rate variation, in an intermetallic-based, high-strength Ni3Al + Ni5Zr eutectic alloy. Imposed solidification rates were varied by casting the alloy into molds of different diameter which resulted in a microstructure consisting of two different morphologies (lamellar and non-lamellar eutectic). The consequent change in solidification conditions translated into various microstructural length scale changes, such as colony width, morphology width, morphology fraction, lamellar width, etc. The bulk mechanical properties were estimated and compared as a function of this change. Consequently, this study alludes toward the potential of achieving higher strengths in such microstructures by lowering the fraction of non-lamellar eutectic morphology, which can be achieved by imposing even faster solidification rates on the solidifying melt. This observation, combined with easy castability of this alloy, make it an attractive candidate for fusion-based additive manufacturing processes, where different cross sections of complex geometries often experience very high solidification rates. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.

Item Type:	Journal Article
Publication:	Journal of Materials Science
Publisher:	Springer
Additional Information:	The copyright for this article belongs to the publishers.
Keywords:	Eutectics; Lamellar structures; Microstructural evolution; Morphology; Nickel alloys; Zinc alloys, Eutectic alloys; High-strength; Lamellar eutectic; Length scale; Mechanical behavior; Micro-structural length; Rate variation; Scale-rate; Solidification condition; Solidification rate, Zirconium alloys
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	14 Nov 2024 21:08
Last Modified:	14 Nov 2024 21:08
URI:	http://eprints.iisc.ac.in/id/eprint/86865

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