Glass Forming Ability and Mechanical Properties of Cu-Zr-Al-Nb Amorphous Alloy. Issue 4 (April 2015)

• Record Type: Journal Article
• Authors: Yanchun, Zhao; Shengzhong, Kou; Xiaopeng, Yuan; Chunyan, Li; Peng, Yu; Yongliang, Pu; Jiao, Xu
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 44:Issue 4(2015)
• Page Start: 791
• Page End: 795
• Publication Date: 2015-04
• Subjects: Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(15)30048-5
• Languages: English
• ISSNs: 1875-5372

Abstract

<abstract abstract-type="author" id="ceab10"> <title id="cestitle10">Abstract</title> <sec> <p id="spara10">Cu₄₆Zr₄₄Al₅Nb₅ amorphous alloys were fabricated by suspend melting under an argon atmosphere using water-cooled Cu mould suction casting. Glass forming ability and mechanical properties of the alloys were studied. The analyses of DSC curves, X-ray diffraction (XRD) patterns and electron diffraction taken from the rods of Cu₄₆Zr₄₄Al₅Nb₅ with different diameters (3, 4, 6 mm) indicate that the critical diameter can be up to 6 mm at least. And the best glass former exhibits an undercooled liquid region Δ<italic>T</italic> of 52 K, and reduced glass transition temperature <italic>T</italic>_rg of 0.60. The critical cooling rate (<italic>R</italic>_c) calculated from TTT (Time-Temperature-Transformation) curves of Cu₄₆Zr₄₄Al₅Nb₅ forming glassy alloy is 3.985 K/s. The intensity of broad peaks from X-ray diffraction patterns, the crystallization enthalpy and the fracture strength of the amorphous rods with different diameters, exhibit obvious difference, which is related to the variation of the cooling rate of solidification for the rods with different size.</p> </sec> </abstract>