New insights into the formation of bulk metallic glasses

metal
Credit: Unsplash/CC0 Public Domain

With the ability to produce metallic glass in bulk quantities, the distinct mechanical behavior of these materials has opened up new application opportunities. However, the poor room temperature plasticity of bulk metallic glasses (BMGs) impedes many engineering applications. Because of that, it's critical to better understand their plastic deformation and flow mechanism.

A team of researchers led by the lab of Udo Schwarz, department chair and professor of mechanical engineering and , and chemical and environmental engineering, explored this issue. With the smallest-scale mechanical deformation testing to date on bulk metallic glasses, the results provide insights critical to understanding the mechanism of BMGs at the atomic scale. One notable finding is a yield stress slightly above theoretical maximum and much higher than what has previously been measured. Another is the finding of homogeneous plastic flow, which is not what's happening in crystals, and which is also not happening on on larger length scales. Additionally, glasses are found to be more homogeneous than previously thought.

The results were recently published in Communications Materials.


Explore further

Tailored hardening of bulk metallic glass induced by 2-D gradient rejuvenation

More information: Jiaxin Yu et al. Atomic-scale homogeneous plastic flow beyond near-theoretical yield stress in a metallic glass, Communications Materials (2021). DOI: 10.1038/s43246-021-00124-3

Atomic-scale homogeneous plastic flow beyond near-theoretical yield stress in a metallic glass. devicematerialscommunity.natur … -in-a-metallic-glass

Provided by Yale University
Citation: New insights into the formation of bulk metallic glasses (2021, April 1) retrieved 19 April 2021 from https://phys.org/news/2021-04-insights-formation-bulk-metallic-glasses.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
8 shares

Feedback to editors

User comments