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Glass-forming ability and mechanical properties of Zr75−xNi25Alx bulk glassy alloys

Published online by Cambridge University Press:  01 January 2011

Y.H. Li ,
W. Zhang ,
C. Dong ,
J.B. Qiang ,
A. Makino ,
M. Fukuhara  and
A. Inoue
Y.H. Li
Affiliation:
School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, People’s Republic of China; and Graduate School, Tohoku University, Sendai 980-8577, Japan
W. Zhang*
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan; and School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, People’s Republic of China
C. Dong
Affiliation:
School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, People’s Republic of China
J.B. Qiang
Affiliation:
School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, People’s Republic of China; and Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
A. Makino
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
M. Fukuhara
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
A. Inoue
Affiliation:
WPI, Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
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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 (ΔTx) of over 80 K and critical sample diameter (dc) for glass formation above 10 mm were obtained in a composition range of x = 11 to 21. The maximum dc of 15 mm was formed for an off-eutectic Zr60Ni25Al15 alloy, which had the largest ΔTx and γ value, along with the lowest density change upon crystallization. The bulk glassy alloys exhibited high compressive yield strength (σc,y) of 1662 to 2060 MPa and distinct plastic strain (εc,p) of 1.2 to 4.7%. With increasing Al content, the σc,y and Young’s modulus linearly increased, while the εc,p gradually decreased. The εc,p was found to have a good correlation with the Poisson’s ratio.

Keywords

AmorphousCastingStrength
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 4 , 28 February 2011 , pp. 533 - 538
Copyright
Copyright © Materials Research Society 2011

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