Effect of Quenching Rate on Properties of Automotive High Strength Al-alloy

被引：0
|
作者：
Li C. [1 ,2 ]
Deng Y. [1 ]
Tang J. [1 ]
Li J. [2 ]
Zhang X. [1 ]
机构：
[1] School of Materials Science and Engineering, Central South University, Changsha
[2] Guangdong Hoshion Industrial Aluminium Co. Ltd., Zhongshan
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2019年 / 33卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Automobile; High-strength aluminum alloys; Metallic materials; Microstructure; Quenching rate;
D O I：
10.11901/1005.3093.2018.391
中图分类号：
学科分类号：
摘要：
The effect of quenching rate on the microstructure and properties of automotive highstrength Al-alloys were investigated by mechanical property testing, electrical conductivity measurement and transmission electron microscopy. The results show that as the quenching rate decreased from 960℃/s to 1.8℃/s, the electrical conductivity increased by 5.7% IACS, the hardness reduction rate is 40%, and the reduction rates of tensile strength and yield strength are 24.2% and 56.9%, respectively. The hardness and strength are linearly related to the logarithm of quenching rate. With the decrease of quenching rate, the size and area fraction of quenching precipitates increase significantly, resulting in the decrease of performance. When the quenching rate is 1.8o C/s, the average size and the area fraction of the quenching precipitate are 465.6 nm×158.2 nm and 42.1%, respectively. © All right reserved.
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页码：103 / 108
页数：5
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