Microstructure and Mechanical Properties of TiC Nanoparticle Reinforced Magnesium Matrix Composites Fabricated by Stirring-ultrasonic Vibration Dispersion Method

Liu Jian; Guan Shuwen; Nan Sihao; Wang Wuxiao

doi:10.15980/j.tzzz.2019.05.024

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Microstructure and Mechanical Properties of TiC Nanoparticle Reinforced Magnesium Matrix Composites Fabricated by Stirring-ultrasonic Vibration Dispersion Method
Vol. 39, Issue 5, Pages: 549-552(2019)
Published： 2019 ，
DOI： 10.15980/j.tzzz.2019.05.024

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[1]刘健,关舒文,南思豪,王武孝.搅拌-超声复合分散纳米TiC增强镁基复合材料的组织性能[J].特种铸造及有色合金,2019,39(05):549-552.

Liu Jian, Guan Shuwen, Nan Sihao, et al. Microstructure and Mechanical Properties of TiC Nanoparticle Reinforced Magnesium Matrix Composites Fabricated by Stirring-ultrasonic Vibration Dispersion Method. [J]. Special Casting & Nonferrous Alloys 39(5):549-552(2019)
[1]刘健,关舒文,南思豪,王武孝.搅拌-超声复合分散纳米TiC增强镁基复合材料的组织性能[J].特种铸造及有色合金,2019,39(05):549-552. DOI： 10.15980/j.tzzz.2019.05.024.

Liu Jian, Guan Shuwen, Nan Sihao, et al. Microstructure and Mechanical Properties of TiC Nanoparticle Reinforced Magnesium Matrix Composites Fabricated by Stirring-ultrasonic Vibration Dispersion Method. [J]. Special Casting & Nonferrous Alloys 39(5):549-552(2019) DOI： 10.15980/j.tzzz.2019.05.024.

摘要

Mg-6Al合金中复合添加微量的稀土元素（1%的Gd和0.5%的Nd）和1%的TiC纳米颗粒

通过半固态机械搅拌和超声波振动实现纳米颗粒在镁合金中的均匀分散

采用时效和固溶处理调控微观组织来进一步提高复合材料的力学性能。结果表明

Mg-6Al-0.5Nd-1Gd镁合金中加入1%的TiC纳米颗粒后

微观组织显著细化

维氏硬度较镁合金基体提高了4.7%。经420℃×8h固溶处理和200℃×4h时效处理后

复合材料的硬度较热处理前又提高了20.9%。

Abstract

Minor amount of rare earth elements（1% Gd and 0.5% Nd）and 1% TiC nanoparticles were added to Mg-6 Al alloys to improve mechanical properties of the alloy.The nanoparticles were uniformly dispersed in the magnesium alloys by semisolid stirring assisted with ultrasonic vibration.Solution treatment and aging treatment were subsequently carried out to further improve the mechanical properties of the composites obtained.The results reveal that after the addition of 1% TiC nanoparticles

the as-cast microstructure of the Mg-6Al-0.5Nd-1Gd alloys can be refined obviously

and the Vickers hardness is enhanced by 4.7%.The hardness of the composites obtained after solid solution at 420℃ for 8 hand aging at 200 ℃ for 4 hwas further improved by 20.9% compared with that of the as-cast ones.