Mechanical Properties of n-SiCp/AZ91D Magnesium Matrix Composites at Elevated Temperature

Zhu Xue; Li Wenzhen; Liu Shiying; He Guangjin; Zhu Xianmeng

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Mechanical Properties of n-SiCp/AZ91D Magnesium Matrix Composites at Elevated Temperature
Vol. 31, Issue 9, Pages: 851-855(2011)
Published： 2011 ，
DOI：

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[1]朱雪,李文珍,刘世英,何广进,朱先朋.n-SiC_p/AZ91D镁基复合材料高温力学性能[J].特种铸造及有色合金,2011,31(09):851-855.

Zhu Xue, Li Wenzhen, Liu Shiying, et al. Mechanical Properties of n-SiCp/AZ91D Magnesium Matrix Composites at Elevated Temperature. [J]. Special Casting & Nonferrous Alloys 31(9):851-855(2011)
[1]朱雪,李文珍,刘世英,何广进,朱先朋.n-SiC_p/AZ91D镁基复合材料高温力学性能[J].特种铸造及有色合金,2011,31(09):851-855. DOI：

Zhu Xue, Li Wenzhen, Liu Shiying, et al. Mechanical Properties of n-SiCp/AZ91D Magnesium Matrix Composites at Elevated Temperature. [J]. Special Casting & Nonferrous Alloys 31(9):851-855(2011) DOI：

摘要

采用机械搅拌和高能超声处理法制备了n-SiCp/AZ91D镁基复合材料

测试了复合材料的室温及高温力学性能。结果表明

n-SiCp的加入能显著提高复合材料的高温力学性能

当n-SiCp加入量为1.5%时

复合材料的抗拉强度和伸长率都达到最大值。随着温度的升高

复合材料的强度降低

伸长率增加。断口形貌观察表明

复合材料的断裂方式由室温下的准解理断裂转变为高温下的韧性断裂。

Abstract

n-SiCp/AZ91D magnesium matrix composites were fabricated by mechanical stirring and high intensity ultrasonic dispersion processing

and mechanical properties of the composites at room temperature and at high temperature were examined.The results show that the elevated mechanical properties of the composites are greatly improved by introducing n-SiC particle.The maximum value of tensile strength and elongation of the composites can be observed with 1.5% SiC particle addition.However

with the temperature increase

the tensile strength is decreased

and elongation is further increased.The fractography observation reveals that the fracture mechanism of the composites is transformed for quasi-cleavage fracture at room temperature into the ductile one at high temperature.