Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Temperature rise at shear bands in metallic glasses

Temperature rise at shear bands in metallic glasses At ambient temperature the plastic flow shown by metallic glasses is localized into shear bands 1,2 . This localization and the liquid-like features seen on fracture surfaces are consistent with shear softening in the bands. The extent to which this softening is a result of local heating has remained controversial, with estimates of the local temperature rise ranging from less than 0.1 kelvin to a few thousand kelvin 3,4,5,6,7,8,9,10,11 . Here we present a new experimental method based on a fusible coating, which shows that the temperature rise, over a few nanoseconds, can be as high as a few thousand kelvin; nevertheless, the temperature rise does not seem to control the shear-band thickness. It is important to understand the mechanisms of shear banding and associated softening because these are the principal factors limiting structural applications of bulk metallic glasses, which have some attractive mechanical properties such as high yield strength 12,13 . http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nature Materials Springer Journals

Temperature rise at shear bands in metallic glasses

Nature Materials , Volume 5 (1) – Dec 18, 2005

Loading next page...
 
/lp/springer-journals/temperature-rise-at-shear-bands-in-metallic-glasses-Qzqx1Fuqpb

References (38)

Publisher
Springer Journals
Copyright
Copyright © 2005 by Nature Publishing Group
Subject
Materials Science; Materials Science, general; Optical and Electronic Materials; Biomaterials; Nanotechnology; Condensed Matter Physics
ISSN
1476-1122
eISSN
1476-4660
DOI
10.1038/nmat1536
Publisher site
See Article on Publisher Site

Abstract

At ambient temperature the plastic flow shown by metallic glasses is localized into shear bands 1,2 . This localization and the liquid-like features seen on fracture surfaces are consistent with shear softening in the bands. The extent to which this softening is a result of local heating has remained controversial, with estimates of the local temperature rise ranging from less than 0.1 kelvin to a few thousand kelvin 3,4,5,6,7,8,9,10,11 . Here we present a new experimental method based on a fusible coating, which shows that the temperature rise, over a few nanoseconds, can be as high as a few thousand kelvin; nevertheless, the temperature rise does not seem to control the shear-band thickness. It is important to understand the mechanisms of shear banding and associated softening because these are the principal factors limiting structural applications of bulk metallic glasses, which have some attractive mechanical properties such as high yield strength 12,13 .

Journal

Nature MaterialsSpringer Journals

Published: Dec 18, 2005

There are no references for this article.