Improving the glass-forming ability and plasticity of a TiCu-based bulk metallic glass composite by minor additions of Si

被引：18

作者：

Gargarella, P. ^{[1
,2
]}

Pauly, S. ^{[1
]}

Khoshkhoo, M. Samadi ^{[1
,3
]}

Kiminami, C. S. ^{[2
]}

Kuehn, U. ^{[1
]}

Eckert, J. ^{[4
,5
]}

机构：

[1] IFW Dresden, Inst Komplexe Mat, Helmholtzstr 20, D-01069 Dresden, Germany

[2] Univ Fed Sao Carlos, Dept Engn Mat, Rodovia Washington Luiz,Km 235, BR-13565905 Sao Paulo, Brazil

[3] Carl Zeiss Microscopy GmbH, Carl Zeiss Promenade 10, D-07745 Jena, Germany

[4] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

[5] Univ Leoben, Dept Mat Phys, Jahnstr 12, A-8700 Leoben, Austria

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 663卷

基金：

欧洲研究理事会; 巴西圣保罗研究基金会;

关键词：

Bulk metallic glass; Rapid solidification; Titanium alloys; Minor element additions; SUPERCOOLED LIQUID; ALLOYING ADDITIONS; ATOMIC PACKING; PARAMETERS; CRITERION; ZR; TRANSFORMATION; FORMABILITY;

D O I：

10.1016/j.jallcom.2015.12.160

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, the effect of Si additions on the glass-forming ability (GFA) and the mechanical behaviour of a Ti42.5Cu42.5Ni7.5Zr7.5 alloy is investigated. An optimum GFA occurs for addition of 0.5 at% Si and it is explained based on a balance between two factors: an increased thermal stability of the supercooled liquid and the detrimental effect of Ti5Si3 on vitrification. On rapid cooling, composites consisting mainly of the cubic B2 phase and glass can form. Their plasticity increases with increasing Si additions without sacrificing their high yield strength. A characteristic core-shell microstructure is formed in the rod with 2 at% Si, for which the combination of an amorphous outer surface and a refined dendritic structure in the centre gives rise to a composite with enhanced mechanical properties. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：531 / 539

页数：9

共 56 条

[1] CONTINUOUS COOLING APPROXIMATION FOR THE FORMATION OF A GLASS
BARANDIARAN, JM
COLMENERO, J
[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 1981, 46 (03) : 277 - 287
[2] Bochvar N., 2006, LANDOLT BORNSTEIN 4
[3] Boer FRd, 1988, Cohesion in Metals
[4] Cacciamani G., 2006, LANDOLT BORNSTEIN 4
[5] Tailoring of microstructure and mechanical properties of a Ti-based bulk metallic glass-forming alloy
Calin, M.
Zhang, L. C.
Eckert, J.
[J]. SCRIPTA MATERIALIA, 2007, 57 (12) : 1101 - 1104
[6] Thermodynamic assessment of B-Zr and Si-Zr binary systems
Chen, H. M.
Zheng, F.
Liu, H. S.
Liu, L. B.
Jin, Z. P.
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 468 (1-2) : 209 - 216
[7] Modeling the amorphous forming ability of Ti-based alloys with wide supercooled liquid regions and high hardness
Cheney, Justin
Khalifa, Hesham
Vecchio, Kenneth
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 506 (1-2): : 94 - 100
[8] The effect of silicon on the glass forming ability of the Cu47Ti34Zr11Ni8 bulk metallic glass forming alloy during processing of composites
Choi-Yim, H
Busch, R
Johnson, WL
[J]. JOURNAL OF APPLIED PHYSICS, 1998, 83 (12) : 7993 - 7997
[9] A simple criterion to predict the glass forming ability of metallic alloys
de Oliveira, Marcelo Falcao
[J]. JOURNAL OF APPLIED PHYSICS, 2012, 111 (02)
[10] A new correlation between electronic parameters and glass forming ability of metallic alloys
de Oliveira, Marcelo Falcao
[J]. PHILOSOPHICAL MAGAZINE LETTERS, 2011, 91 (06) : 418 - 422

← 1 2 3 4 5 6 →