Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61725
Title: Microstructure and tensile behavior of small scale resistance spot welding of sandwich bulk metallic glasses
Authors: Guo, SF
Chan, KC 
Zhu, ZQ
Wu, ZR
Chen, W
Song, M
Keywords: Laminate
Metallic glasses
Microstructure
Tensile behavior
Issue Date: 2016
Publisher: North-Holland
Source: Journal of non-crystalline solids, 2016, v. 447, p. 300-306 How to cite?
Journal: Journal of non-crystalline solids 
Abstract: In this work, a small-scale resistance spot welding method was utilized to join two dissimilar Zr-based bulk metallic glasses and to fabricate the sandwich-laminated metallic glass plates. The laminates exhibit an almost fully amorphous structure without undesirable crystallization. Elemental line scanning across the joint interface shows a uniform distribution of the main elements, demonstrating favorable metallurgical bond in the laminate. The resultant tensile strength of the welded laminate is comparable to that of the parent metallic glasses. The fractured surface of the laminate exhibits extensive multiple failure planes, suggesting that the fracture instability was mediated by a crack branching mechanism over across the joint interface. Such a crack branching mechanism results in a stepwise fracture behavior which is contrastingly different from the conventional single primary shear band dominated catastrophic fracture in monolithic metallic glasses under tension. The unique stepwise fracture behavior endows the sandwiched metallic glass laminates with an excessive strain energy absorption through the joint interface than monolithic metallic glasses. Our results demonstrate that small-scale resistance spot welding is a promising approach to scaling up metallic glasses and to fabricating metallic glass laminates with desirable mechanical performance for structural applications.
URI: http://hdl.handle.net/10397/61725
ISSN: 0022-3093
DOI: 10.1016/j.jnoncrysol.2016.06.026
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

WEB OF SCIENCETM
Citations

1
Last Week
0
Last month
Citations as of Oct 15, 2017

Page view(s)

34
Last Week
0
Last month
Checked on Oct 15, 2017

Google ScholarTM

Check

Altmetric



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