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Indexed by:会议论文

Date of Publication:2012-08-01

Included Journals:EI、CPCI-S、Scopus

Volume:750

Page Number:306-+

Key Words:Bulk metallic glasses; glass-forming ability; mechanical properties; Zr-Ni-Al alloys

Abstract:The thermal stability and glass-forming ability (GFA) of Zr70Ni30-xAlx (x = 5 - 19) metallic alloys were investigated. Alloy with x = 8 has the largest critical diameter (d(c)) of 2 mm in the alloy series, which possesses the largest supercooled liquid region, T-rg and gamma value, simultaneously. Further addition of 2 - 4 at.% Nb to Zr70Ni22Al8 alloy by replacement of Zr increases the d(c) up to 6 mm. In addition, Zr70Ni22Al8 bulk metallic glass exhibits large compressive plastic strain of 13.8% with yielding stress of 1547 MPa and Young's modulus of 79 GPa. Addition of Nb increases the strength but lowers the plasticity.