Dec 8 – 10, 2020 Online only
Online event
Europe/Berlin timezone

Phase Transformation in AlTiNbVW High Entropy alloy

Dec 9, 2020, 2:30 PM
3h 30m
Online event

Online event

Speaker

Xiaohu Li (FRM2, Physik, TU München)

Description

High entropy alloys (HEAs), which comprise more than five principal elements, are presently of great interest in materials science and engineering. A predication by CALPHAD has been performed in a new AlTiNbVW HEA, which shows that this alloy consists of two similar bcc phases in the as-cast condition. Current work is to study the phase composition in this multicomponent alloy system at equiatomic condition using neutron/synchrotron diffraction under heat treatment. The chemical composition and microstructure of these two bcc phases has been determined using Energy Dispersive X-Ray Analysis (EDX) and Backscattered-Electron (BSE) Imaging. A diffusion controlled phase transformation between these two bcc phases has been found to take place between 1000°C and 1700°C. The phase transformations kinetic of this bcc1 to bcc2 transformation has been studied systematically using in-situ neutron/synchrotron diffraction with combination of a dilatometer.

Primary author

Xiaohu Li (FRM2, Physik, TU München)

Co-authors

Ms Yinying Ting (Physik Department, Technische Universität München (TUM), 85748 Garching, Germany) Weimin Gan (Helmholtz-Zentrum Geesthacht) Michael Hofmann Mr Zhida Liang (Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany) Markus Hoelzel

Presentation materials

There are no materials yet.