Hot-deformation behaviour of AA2124 composites reinforced with both particles and whiskers of SiC

被引：24

作者：

Ko, BC ^{[1
]}

Yoo, YC ^{[1
]}

机构：

[1] Inha Univ, Dept Engn Met, Inchon 402751, South Korea

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 1998年 / 58卷 / 3-4期

关键词：

hybrid composites; hot deformation; hot recovery; dynamic recrystallization; dynamic recovery; flow stress;

D O I：

10.1016/S0266-3538(97)00147-4

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

The hot-deformation behaviour of AA2124 composites reinforced with both whiskers and particles of silicon carbide (15 vol% SiCw + SiCp) was investigated by means of hot torsion tests in the temperature range 300 to 500 degrees C over a strain rate range of 1.32 x 10(-3) to 2.38s(-1). The composites with various SiCw: SiCp ratios of 1:1, 1:2 and 1.3 were fabricated by the powder-metallurgy route. From the pow curves and hot-deformed microstructures. the hot recovery mechanism of composites deformed a: 300-400 degrees C at 1.32x10(-3) s(-1) strain rate was found to be dynamic recrystallization, while at temperatures higher than 450 degrees C dynamic recovery was responsible for the hot recovery mechanism of the composites. It was found that the composite with SiCw:SiCp=1. 1 showed the highest pow stress (52 MPa) and failure strain (375%) at 450 degrees C and 7.94x10(-2)s(-1). (C) 1998 Elsevier Science Ltd.. All rights reserved.

引用

页码：479 / 485

页数：7

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