|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Microstructure and Diffusion Properties of Ordered Multicomponent B2 Aluminides
||G. Mohan Muralikrishna, Mayur Vaidya, Christian Liebscher, Gerhard Wilde, B.S. Murty, Sergiy V. Divinski
|On-Site Speaker (Planned)
||G. Mohan Muralikrishna
Microstructure, sublattice ordering and tracer diffusion in ordered multi component B2 AlNi, Al(FeNi), Al(CoFeNi), Al(CoFeMnNi) and Al(CoCuFeMnNi) aluminides are studied. The alloys were prepared by vacuum arc melting followed by suction casting and homogenization. X-ray diffraction and high-resolution transmission electron microscopy are used to quantify the B2 order in the alloys. Microstructure and chemical analyses are performed using scanning electron microscopy.
Tracer diffusion of the 57Co, 59Fe, 54Mn, 63Ni and 65Zn radioisotopes is measured at a wide temperature interval and the activation energies of volume diffusion are estimated. Diffusion in multi-component B2 ordered alloys is found to be faster in comparison to binary AlNi. Addition of Co to AlNi is observed to slow down diffusion and Fe is established to enhance diffusion. Measured diffusivities are compared to the data in the existing literature and the effect of multi-component matrix and B2 ordering on diffusion are discussed.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume