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

作　　者：陈云[1] 邓森 杜娟[2] 汪锐 杨磊[1] 杜艳迎[1] 夏望红 Chen Yun;Deng Sen;Du Juan;Wang Rui;Yang Lei;Du Yanying;Xia Wanghong(School of Transportation and Logistics Engineering,Wuhan University of Technology;School of Intelligent Manufacturing,Wuhan Technical College of Communications;Shandong Honho Lightweight Technologies.Co.Ltd.)

机构地区：[1]武汉理工大学交通与物流工程学院 [2]武汉交通职业学院智能制造学院 [3]山东宏和轻量化科技有限公司

出　　处：《特种铸造及有色合金》2021年第10期1189-1193,共5页Special Casting & Nonferrous Alloys

基　　金：中央高校基本科研业务费专项资助项目(2021IVA053)。

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。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.

关 键 词：超声辅助 机械搅拌 纳米TiN AL-CU-MN合金 力学性能 

分 类 号：TB331[一般工业技术—材料科学与工程]