119 0

Effect of hydrogen on the yielding behavior and shear transformation zone volume in metallic glass ribbons

Title
Effect of hydrogen on the yielding behavior and shear transformation zone volume in metallic glass ribbons
Author
장재일
Keywords
Amorphous alloys; Hydrogen; Nanoindentation; Yield behavior; Shear transformation zone (STZ)
Issue Date
2014-10
Publisher
Elsevier Science B.V., Amsterdam.
Citation
Acta materialia , Vol.78 No.- [2014] , 213-221
Abstract
The effect of hydrogen (H) charging on the shear yield strength (τmax) and shear transformation zone volume (Ω) of Ni?Nb?Zr metallic glass ribbons, with varying Zr content, were studied through the first pop-in loads during nanoindentation. Weight gain measurements after H charging and desorption studies were utilized to identify how the total H absorbed during charging is partitioned into mobile and immobile (or trapped) parts. These, in turn, indicate the significant role of H mobility in the amorphous structure on the yielding behavior. In high-Zr alloys, τmax increases significantly whereas Ω decreases. In low-Zr alloys, a slight decrease in τmax and increase in Ω were noted. These experimental observations are rationalized in terms of the mobility of the absorbed H in the amorphous structure and the possible role of it in the shear transformation zone dynamics during deformation of the metallic glass.
URI
https://www.sciencedirect.com/science/article/pii/S1359645414004662?via%3Dihubhttp://hdl.handle.net/20.500.11754/51132
ISSN
1359-6454; 1873-2453
DOI
10.1016/j.actamat.2014.06.046
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE