The effects of cooling rate and heat treatment on mechanical and thermal characteristics of Al-Si-Cu-Mg foundry alloys

被引：74

作者：

Choi, S. W. ^{[1
]}

Kim, Y. M. ^{[1
,2
]}

Lee, K. M. ^{[1
,2
]}

Cho, H. S. ^{[2
]}

Hong, S. K. ^{[2
]}

Kim, Y. C. ^{[1
]}

Kang, C. S. ^{[1
]}

Kumai, S. ^{[3
]}

机构：

[1] Korea Inst Ind Technol, Kwangju 500480, South Korea

[2] Chonnam Natl Univ, Sch Mat Sci & Engn, Kwangju 500757, South Korea

[3] Tokyo Inst Technol, Dept Met & Ceram Sci, Tokyo 1528552, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 617卷

关键词：

Al-Si-Cu-Mg alloy; Casting; Heat treatment; Mechanical properties; Thermal property; CAST ALLOYS; TENSILE PROPERTIES; AGING BEHAVIOR; FLASH METHOD; DIFFUSIVITY; CAPACITY; FRACTURE;

D O I：

10.1016/j.jallcom.2014.08.033

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 microstructure of the Al-9.7Si-0.7Cu-0.4Mg alloy solidified by different cooling rates was reported in this study and solution heat treatment followed by aging treatment was carried out for the effects of heat treatment on mechanical and thermal characteristics. The solution treatment was performed at 535 degrees C for 6 h and then the specimens were cooled by water quenching. The samples were aged at 180 degrees C or 190 degrees C for 1-10 h. By heat treatment, the long needles of eutectic silicon particles were broken down into smaller fragments and then gradually spheroidized. Spheroidizing of the eutectic silicon particles has found to improve the tensile strength and thermal diffusivity of the alloy. In particular, as increasing the aging temperature of Al-Si-Cu-Mg alloy from 180 degrees C to 190 degrees C, the 3% higher thermal conductivity was achieved. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：654 / 659

页数：6

共 27 条

[1] Influence of Aging Parameters on the Tensile Properties and Quality Index of Al-9 Pct Si-1.8 Pct Cu-0.5 Pct Mg 354-Type Casting Alloys [J].