☆ 4.7 Article

Surface vitrification of alloys by laser surface treatment

JOURNAL OF ALLOYS AND COMPOUNDS (2012)

Journal

JOURNAL OF ALLOYS AND COMPOUNDS

Volume 511, Issue 1, Pages 215-220

Publisher

ELSEVIER SCIENCE SA

DOI: 10.1016/j.jallcom.2011.09.039

Keywords

Laser; Metallic glasses; Microstructure; Glass-forming ability; Thermal simulation

Categories

Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering

Funding

National Basic Research Program of China [2007CB613900]
National Nature Science Foundation of China [50771005, 50771006]
Program for New Century Excellent Talents in University [NCET-07-0041]

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Abstract

With laser surface treatment (LST) method, the surfaces of Zr-, Cu-, Fe- and Al-based alloys were melted and amorphous or amorphous-crystalline composite structures were synthesized, which were related to the different glass-forming ability of the alloys. Influences of laser processing parameters on glass formation for Cu(60)Zr(30)Ti(10) alloy were investigated and the laser treated alloy exhibited a gradient structure: amorphous surface, amorphous-crystalline composites transitional region and crystalline substrate. Temperature distributions and thermal profiles of the treated Cu(60)Zr(30)Ti(10) alloy during the laser process were simulated using finite volume method. The formation mechanism of the gradient structure is discussed based on the experimental and simulated results. (C) 2011 Elsevier B.V. All rights reserved.

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