Effect of stress states on the deformation behavior of Cu-based bulk metallic glass in the supercooled liquid region

TitleEffect of stress states on the deformation behavior of Cu-based bulk metallic glass in the supercooled liquid region
Publication TypeJournal Article
Year of Publication2014
AuthorsPark ES, Kim HJ, Bae JC, Huh MY
Journal TitleJournal of Alloys and Compounds
Volume586
PagesS31-S35
Date Published02
Type of ArticleArticle
ISBN Number0925-8388
Accession NumberWOS:000328188800007
Keywordsamorphous-alloys, bulk metallic glass, crystallization behavior, Deformation behavior, diffusion, MECHANICAL-BEHAVIOR, SUPERCOOLED LIQUID REGION, superplastic deformation, viscous-flow
Abstract

The effect of stress states on the deformation behavior of the Cu54Zr22Ti18Ni6 bulk metallic glass (BMG) alloy was studied in the supercooled liquid region. At 723 K, Newtonian plastic flow governed the deformation during the compression test, whereas strain-hardening occurred during the tensile test. At 733 K, a fast failure was observed during tensile test. The diffusion rate of Cu atoms in the BMG alloy plays an important role in the deformation behavior. The fast diffusion of Cu atoms under the tensile stress state caused faster crystallization leading to a fast strain-hardening during the tensile plastic deformation. Published by Elsevier B.V.

URL<Go to ISI>://WOS:000328188800007
DOI10.1016/j.jallcom.2013.01.031