Influence of combinatorial annealing and plastic deformation treatments on the intrinsic properties of Cu₄₆Zr₄₆Al₈ bulk metallic glass

Author(s)

A. Rezvan, B. Sarac, V. Soprunyuk, J. T. Kim, K. K. Song, C. J. Li, W. Schranz, J. Eckert

Abstract

In this paper, the effect of severe plastic deformation (SPD) induced by high-pressure torsion (HPT) and isothermal heat treatment (HT) below the glass transition on the structure-property relationships of Cu46Zr46Al8 bulk metallic glass (BMG) is assessed separately and alternately in reference to the as-cast state. Pronounced modifications are confirmed by X-ray diffraction, differential scanning calorimetry, dynamic mechanical analysis (DMA), dilatometry analysis, and scanning electron microscopy. Diffusion-controlled crystallization is achieved via HT with optimized parameters, and HPT is used afterwards to disperse crystalline phases relatively homogenous throughout the matrix. The dispersion of the second phase improves the thermomechanical stability around the glass transition temperature, as confirmed by DMA. Compared to a single HT process, a sequential combination of HT + HPT leads to a glass showing a linear hardness profile with values higher than the as-cast state. This study provides insights into possible processing routes for enhancing the mechanical and/or thermal properties of CuZr-based BMGs, which can also be used to tailor new design routes for other BMG systems.

Organisation(s)

Physics of Functional Materials

External organisation(s)

Montanuniversität Leoben, Shandong University at Weihai, Kunming University of Science and Technology, Österreichische Akademie der Wissenschaften (ÖAW)

Journal

Intermetallics

Volume

127

No. of pages

6

ISSN

0966-9795

DOI

https://doi.org/10.1016/j.intermet.2020.106986

Publication date

12-2020

Peer reviewed

Yes

Austrian Fields of Science 2012

103018 Materials physics

Keywords

ASJC Scopus subject areas

Chemistry(all), Mechanics of Materials, Mechanical Engineering, Metals and Alloys, Materials Chemistry

Portal url

https://ucris.univie.ac.at/portal/en/publications/influence-of-combinatorial-annealing-and-plastic-deformation-treatments-on-the-intrinsic-properties-of-cu46zr46al8-bulk-metallic-glass(0f6d86fe-d8bb-468b-ad38-02208eaab6d5).html