Regensburg 2019 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 14: Topical session (Symposium MM): High entropy and compositionally complex alloys
MM 14.9: Vortrag
Dienstag, 2. April 2019, 13:00–13:15, H43
Microstructure and diffusion behavior of pseudobinary multicomponent intermetallic compounds — •Mohan Muralikrishna Garlapati1,2, Mayur Vaidya2, Gerhard Wilde2, Kaustubh N. Kulkarni3, Sergiy Divinski2, and Murty B.S.1 — 1Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India — 2Institute of Materials Physics, University of Muenster, Muenster 48149, Germany — 3Indian Institute of Technology Kanpur, Kalyanpur, U.P. 208 016, India
The current study investigates the possible formation of ordered B2 intermetallic compounds with the addition of multiple elements. In order to have the advantage of a light weight and high strength, a novel pseudo binary approach has been employed for alloy synthesis from binary to quinary. In each alloy, Al content is maintained as 50 at.% and other elements (Co, Fe, Mn and Ni) constitute the remaining 50 at.%. The alloys have been processed using vacuum arc melting followed by suction casting. Synthesized alloys have been homogenized at 1100° C for 5 days. X-ray diffraction analysis confirms the presence of B2 phase in all the alloys. Scanning electron microscopy validates a uniform phase composition and coarse grain microstructure. Self-diffusivities of the constituent elements in each of the alloys have been determined at 1100° C using radiotracer technique. Diffusion coefficients have been measured using tracer penetration profiles and are compared with literature and the impact of multi-element matrix on diffusion is discussed.