Influence of Casting Parameters on the Critical Casting Size of Bulk Metallic Glass

被引：57
作者：
Laws, Kevin J. [1 ]
Gun, Bulent [1 ]
Ferry, Michael [1 ]
机构：
[1] Univ New S Wales, Sch Mat Sci & Engn, Australian Res Council, Ctr Excellence Design Light Met, Sydney, NSW, Australia
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2009年 / 40A卷 / 10期
基金：
澳大利亚研究理事会;
关键词：
FORMING ABILITY; AMORPHOUS-ALLOYS; THERMAL-CONDUCTIVITY; CRITERION; STABILITY;
D O I：
10.1007/s11661-009-9929-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of various casting parameters and thermophysical properties of bulk metallic glasses (BMGs) on critical section size, defined as the maximum casting size that generates a through-section amorphous alloy, has been analyzed using a simple heat-transfer model. It was found that the interfacial heat transfer between the mold and the casting has a strong influence on the critical section thickness of a BMG. It is argued herein that the critical cooling rate rather than the critical casting size is a more robust indicator of glass-forming ability (GFA). Further, with respect to the critical cooling rate and heat-transfer effects during casting, a distinct difference was found between the critical casting thickness in rectangular-shaped castings and the critical casting diameter in rod-shaped castings, and a relationship was derived for relating these parameters.
引用
收藏
页码：2377 / 2387
页数：11
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