The structure of the welded zone and phase transformation behavior of Ni-based bulk-glass forming alloy

D. V. Louzguine-Luzgin, G. Xie, T. Tsumura, K. Nakata, Y. Murakami, H. M. Kimura, A. Inoue

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

4 Citations (Scopus)

Abstract

The crystallization behavior and the structure of the welded samples of the Ni53Nb20Ti10Zr8Co 6Cu3 glassy alloy are studied. A large supercooled liquid region of about 50 K observed enables its successful welding. On heating the supercooled liquid crystallizes by polymorphous mechanism forming a single metastable hR14 Ni4Ti3 phase which further transforms at higher temperature forming several equilibrium phases. Its composition was found to be very close (equal within the confidential interval) to that of the glassy phase. The kinetic analysis confirmed the interface-controlled polymorphous transformation mechanism observed. Good bonding between two glassy samples was obtained after welding. The results indicate that with an increase in the welding speed from 2 to 3 m/min the structure of the welded zone changes from the amorphous + hR14 Ni4Ti3 crystalline phase to an almost single amorphous one. By adjusting the welding speed one can obtain the desired microstructure. The samples electron-beam welded at the beam current of 4 mA and voltage of 60 kV at a speed of 4 m/min were found to be almost amorphous. The results indicate successful welding of the Ni-based glassy samples.

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
Pages3-8
Number of pages6
Publication statusPublished - 2007
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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