Weldability and mechanical property of N53Nb20Ti 10Zr8Co6Cu3 metallic glass foil by laser welding

Takuya Tsumura, Katsunori Kobayashi, Kazuhiro Nakata, Natsuki Yoneyama, Taichi Murakami, Hisamichi Kimura, Akihisa Inoue

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

In order to evaluate the weldability of a melt-spun Ni-based metallic glass foil with a thickness of 25 urn, bead-on-plate laser welding was carried out at different welding speeds from 2 to 12 m/min using a diode laser beam with a constant laser power of 26 W and wavelength of 808 nm. A sound weld bead, while maintaining the amorphous state, was successfully obtained at a high welding speed of 12 m/min; under these conditions, the weld bead consisted of an amorphous matrix with a very small amount of nanocrystals with a mean diameter of 14 nm. The hardness was almost the same as that of the base metal (740 HV), and the mean tensile strength of the weld bead was 1312 MPa, which is 56% of that of the base metal. At a lower welding speed of less than 6 m/min, a fusion zone appeared in the central zone of the weld bead consisting of the amorphous matrix with comparably large crystals with mean diameter of 170 nm. Further, the heat-affected zones adjacent to the fusion zone consisted of a completely crystallized structure with a high hardness of around 1200 HV, which caused a low joint strength or weld cracking due to the brittleness of crystallization or structural relaxation.

Original languageEnglish
Title of host publicationProceedings of the 2nd Int. Conf. Characterization and Control of Interfaces for High Quality Advanced Materials, and Joining Technology for New Metallic Glasses and Inorganic Materials
Pages109-116
Number of pages8
Publication statusPublished - 2007 Dec 1
Event2nd International Conference on Characterization and Control of Interfaces for High Quality Advanced Materials, and Joining Technology for New Metallic Glasses and Inorganic Materials - Kurashiki, Japan
Duration: 2006 Sep 62006 Sep 9

Publication series

NameCeramic Transactions
Volume198
ISSN (Print)1042-1122

Other

Other2nd International Conference on Characterization and Control of Interfaces for High Quality Advanced Materials, and Joining Technology for New Metallic Glasses and Inorganic Materials
CountryJapan
CityKurashiki
Period06/9/606/9/9

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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