纳米TiN颗粒增强Al-5Cu-0.5Mn铝基复合材料显微组织与力学性能

陈云; 邓森; 杜娟; 汪锐; 杨磊; 杜艳迎; 夏望红

doi:10.15980/j.tzzz.2021.10.001

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纳米TiN颗粒增强Al-5Cu-0.5Mn铝基复合材料显微组织与力学性能
Microstructure and Mechanical Properties of Nano-TiN Particles Reinforced Al-5Cu-0.5Mn Composites
2021年41卷第10期页码：1189-1193
纸质出版日期： 2021 ，
DOI： 10.15980/j.tzzz.2021.10.001

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陈云, 邓森, 杜娟, 等. 纳米TiN颗粒增强Al-5Cu-0.5Mn铝基复合材料显微组织与力学性能[J]. 特种铸造及有色合金杂志, 2021,41(10):1189-1193.

Chen Yun, Deng Sen, Du Juan, et al. Microstructure and Mechanical Properties of Nano-TiN Particles Reinforced Al-5Cu-0.5Mn Composites[J]. Special Casting & Nonferrous Alloys, 2021,41(10):1189-1193.
陈云, 邓森, 杜娟, 等. 纳米TiN颗粒增强Al-5Cu-0.5Mn铝基复合材料显微组织与力学性能[J]. 特种铸造及有色合金杂志, 2021,41(10):1189-1193. DOI： 10.15980/j.tzzz.2021.10.001.

Chen Yun, Deng Sen, Du Juan, et al. Microstructure and Mechanical Properties of Nano-TiN Particles Reinforced Al-5Cu-0.5Mn Composites[J]. Special Casting & Nonferrous Alloys, 2021,41(10):1189-1193. DOI： 10.15980/j.tzzz.2021.10.001.

摘要

采用超声辅助机械搅拌工艺制备了纳米TiN颗粒含量为0.3%的TiN/Al-5Cu-0.5Mn铝基复合材料

并对其显微组织与力学性能进行了研究。结果表明

该工艺能显著细化其晶粒尺寸

由182.74μm细化到69.61μm

且组织等轴化倾向明显

纳米颗粒团聚平均尺寸也从197.08 nm减少至173.92 nm。该工艺制备的Al-5Cu-0.5Mn复合材料的屈服强度、抗拉强度、伸长率、硬度相比Al-5Cu-0.5Mn基体合金分别增加了16.73%、14.99%、58.81%、11.68%

说明该工艺可提升Al-5Cu-0.5Mn复合材料的综合力学性能。另外

拉伸断口为准解理断裂模式

断口河流花样明显增多

且均匀分布较多由TiN纳米颗粒脱落形成的小尺寸韧窝。

Abstract

0.3%TiN nanoparticles reinforced Al-Cu-Mn composites were prepared by ultrasonic assisted mechanical stirring

and microstructure and mechanical properties of the composites were investigated. The results reveal that the grain size of the metal matrix is significantly refined from 182.74 μm to 69.61 μm

and the microstructure become equiaxed structure. Meanwhile

the average size of nanoparticles agglomeration is decreased from 197.08 nm to 173.92 nm. The yield strength

tensile strength

elongation and hardness of prepared Al-Cu-Mn composites are increased by 16.73%

14.99%

58.81% and 11.68%

respectively

indicating that the comprehensive mechanical properties of Al-Cu-Mn composites are improved. The tensile fracture of TiN nanoparticles reinforced Al-Cu-Mn is characterized by quasi-cleavage

where river patterns are increased obviously

and large amounts of dimples formed by the exfoliation of TiN nanoparticles are evenly distributed.