纳米SiC<sub>p</sub>增强AZ91复合材料的热压缩变形行为

商景利; 柯黎明

doi:10.15980/j.tzzz.2019.04.020

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纳米SiC_p增强AZ91复合材料的热压缩变形行为
Hot Compression Deformation Behavior of Nano SiC Particle Reinforced AZ91Composites
2019年39卷第4期页码：426-429
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.04.020

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[1]商景利,柯黎明.纳米SiC_p增强AZ91复合材料的热压缩变形行为[J].特种铸造及有色合金,2019,39(04):426-429.

Shang Jingli, Ke Liming. Hot Compression Deformation Behavior of Nano SiC Particle Reinforced AZ91Composites[J]. Special Casting & Nonferrous Alloys, 2019,39(4):426-429.
[1]商景利,柯黎明.纳米SiC_p增强AZ91复合材料的热压缩变形行为[J].特种铸造及有色合金,2019,39(04):426-429. DOI： 10.15980/j.tzzz.2019.04.020.

Shang Jingli, Ke Liming. Hot Compression Deformation Behavior of Nano SiC Particle Reinforced AZ91Composites[J]. Special Casting & Nonferrous Alloys, 2019,39(4):426-429. DOI： 10.15980/j.tzzz.2019.04.020.

摘要

利用Gleeble-3500热模拟机对搅拌摩擦加工制备的纳米SiC

增强AZ91复合材料在200、300、400℃

0.005s-1和0.1s-1条件下进行高温压缩变形。结果表明

利用搅拌摩擦加工方法制备的纳米SiC

增强AZ91复合材料

组织均匀、晶粒细小

其高温压缩应力-应变曲线呈现明显动态再结晶特征

温度越低、应变速度越大

流变应力越大

但其流变峰值应力及峰值应变均比同条件下变形时未添加SiC

的AZ91合金低

表现出比AZ91合金更好的高温塑性变形能力。

Abstract

Hot compression deformation behavior of nano SiC particles reinforced AZ91 composites fabricated via friction stirring at 200

300

400℃and 0.005

0.1 s-1 were carried out using Gleeble-3500 simulator.Microstructure and flow stress of the composites reveal that the stress-strain curves of the composites with uniform and fine microstructure exhibit an obvious characteristics of dynamic recrystallization

and the flow stress of the composites is increased with the decrease of deformation temperature and the increase of strain rate

however the peak flow stress and corresponding peak strain of the composites are lower than those of the unreinforced AZ91 deformed at the same condition

indicating that the composites have a better hot deformation behovior.