Effect of Nano SiC on Microstructure and Properties of AZ91D Magnesium Alloy

LIU Hong-xu; LI Cai-xia; ZHANG Yang; YANG Zhi-feng

doi:10.15938/j.jhust.2021.03.018

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Effect of Nano SiC on Microstructure and Properties of AZ91D Magnesium Alloy

更新时间：2026-08-31

- Effect of Nano SiC on Microstructure and Properties of AZ91D Magnesium Alloy
- Vol. 26, Issue 3, Pages: 121-126(2021)
- 作者机构：
  
  1. 哈尔滨理工大学材料科学与工程学院,黑龙江,哈尔滨,150040
  2. 哈尔滨市固态电子有限公司,哈尔滨,150060
- 作者简介：
- 基金信息：
- DOI：10.15938/j.jhust.2021.03.018
  CLC： TG146.22;TB333
- Published：2021
- 稿件说明：
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LIU Hong-xu, LI Cai-xia, ZHANG Yang, et al. Effect of Nano SiC on Microstructure and Properties of AZ91D Magnesium Alloy[J]. 2021, 26(3): 121-126.
DOI：

LIU Hong-xu, LI Cai-xia, ZHANG Yang, et al. Effect of Nano SiC on Microstructure and Properties of AZ91D Magnesium Alloy[J]. 2021, 26(3): 121-126. DOI： 10.15938/j.jhust.2021.03.018.

摘要

为了研究不同SiCp含量对AZ91D 镁合金的强化机理，采用扫描电子显微镜测定了各相的微观结构组织形貌和分布特征。同时，结合X 射线衍射分析结果，探究其强化机制。结果表明，纳米SiCp加入使基体组织变为柱状晶和树枝晶。纳米SiCp的加入可以显著改善基体结构。在本次实验中，纳米SiCp的含量与晶粒尺寸成反比。当纳米SiCp质量分数为0. 5% 时，AZ91D 镁合金的晶粒细化效果特别显著，此时晶粒尺寸达到103. 05 μm。适量的纳米SiCp可以改善AZ91D 镁合金的力学性能，但抗拉强度随着增强体含量先增加后减少。当增强体含量为0. 5% 时，拉伸强度达到最大值。

Abstract

In order to study the effect of different SiCp content on the microstructure and properties of AZ91Dalloy，the effects of SiCp on the as-cast microstructure and mechanical properties of AZ91D magnesium alloy wereinvestigated by means of metallographic microscope，scanning electron microscopy and X-ray diffraction analysis.The average grain size and area of the composites were determined. The results show that，in this experiment，thehigher the content of SiCp，the smaller the size of the crystal grains. Adding proper amount of SiCp can improve themicrostructure of AZ91D magnesium alloy and improve its mechanical properties. In this experiment，when theSiCp content is 0. 5%，the grain refining effect of the AZ91D magnesium alloy Is most obvious，and the grain size is103. 05 μm. The addition of SiCp can also improve the tensile strength，elongation and hardness of AZ91Dmagnesium alloy. The tensile strength，elongation and hardness of the alloy are 218. 34 MPa，6. 17% and78. 42 HV.

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