Instabilities in rapid solidification of multi-component alloys

被引：5
|
作者：
Altieri, Anthony L. [1 ]
Davis, Stephen H. [1 ]
机构：
[1] Northwestern Univ, McCormick Sch Engn & Appl Sci, Dept Engn Sci & Appl Math, 2145 Sheridan Rd, Evanston, IL 60208 USA
来源：
JOURNAL OF CRYSTAL GROWTH | 2017年 / 476卷
关键词：
Directional solidification; Interfaces; Morphological stability; Solidification; DIRECTIONAL SOLIDIFICATION; PLANAR INTERFACE; TERNARY ALLOYS; MODEL; DIFFUSION; STABILITY; SIMULATION; GROWTH;
D O I：
10.1016/j.jcrysgro.2017.07.007
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Rapid solidification of multi-component liquids occurs in many modern applications such as additive manufacturing. In the present work the interface departures from equilibrium consist of the segregation coefficient and liquidus slope depending on front speed, the one-sided, frozen-temperature approximation, and the alloy behaving as the superposition of individual components. Linear-stability theory is applied, showing that the cellular and oscillatory instabilities of the binary case are modified. The addition of components tends to destabilize the interface while the addition of a single large-diffusivity material can entirely suppress the oscillatory mode. Multiple minima in the neutral curve for the cellular mode occur. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：78 / 89
页数：12
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