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Indexed by:期刊论文

Date of Publication:2011-02-01

Journal:JOURNAL OF MATERIALS RESEARCH

Included Journals:Scopus、SCIE、EI

Volume:26

Issue:4

Page Number:533-538

ISSN No.:0884-2914

Abstract:The thermal stability, glass-forming ability (GFA), mechanical properties and Poisson's ratio of a Zr-based Zr75-xNi25Alx (x = 0 to 24) glassy alloy series have been investigated systematically. The large supercooled liquid region (Delta T-x) of over 80 K and critical sample diameter (d(c)) for glass formation above 10 mm were obtained in a composition range of x = 11 to 21. The maximum d(c) of 15 mm was formed for an off-eutectic Zr60Ni25Al15 alloy, which had the largest Delta T-x and gamma value, along with the lowest density change upon crystallization. The bulk glassy alloys exhibited high compressive yield strength (sigma(c,y)) of 1662 to 2060 MPa and distinct plastic strain (epsilon(c,p)) of 1.2 to 4.7%. With increasing Al content, the sigma(c,y) and Young's modulus linearly increased, while the epsilon(c,p) gradually decreased. The epsilon(c,p) was found to have a good correlation with the Poisson's ratio.