Effect of concentration-gradient on characteristic parameters of α-Al dendrites in Al-Cu alloy

被引：4

作者：

Li, Faguo ^{[1
,2
]}

Shi, Dongming ^{[2
]}

Hu, Xiaoyuan ^{[2
]}

Yin, Fucheng ^{[2
]}

Zhang, Jiao ^{[3
]}

Sun, Baode ^{[3
]}

机构：

[1] Xiangtan Univ, Sch Mat Sci & Engn, Mat Sci & Engn Postdoctoral Res Stn, Xiangtan 411105, Peoples R China

[2] Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Mat Design & Preparat Technol Hunan, Xiangtan 411105, Peoples R China

[3] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 889卷

基金：

中国国家自然科学基金;

关键词：

Concentration-gradient; Microstructural parameter; Dendrite; Al-Cu alloy; Concentration-gradient alloy; ARM SPACING RELATIONSHIPS; HIGH THERMAL-GRADIENT; MECHANICAL-PROPERTIES; DIRECTIONAL SOLIDIFICATION; SIMPLE-MODEL; COOLING RATE; ALUMINUM; GROWTH; INTERFACE; BIMETAL;

D O I：

10.1016/j.jallcom.2021.161666

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：

The alpha-Al dendrites of the Al-Cu alloy can maintain directional growth under concentration-gradient. Primary and secondary dendrite arm spacings, denoted lambda(1) and lambda(2), respectively, were measured to determine the Al-Cu concentration-gradient alloys that were solidified directionally at various concentration gradients (Gc), concentration (C) and cooling rates (RT). The lambda(1) and lambda(2) were expressed as functions of solidification parameters by using a regression analysis. The results were in good agreement with previous experimental work. This study provides some regression mathematical models to predict the microstructure of concentration-gradient alloys based on process parameters of the concentration-gradient, concentration and cooling rate, and it provides a path to design the properties of concentration-gradient alloys. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：9

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