累积轧制复合（ARB）过程中Al-TiB₂/TiC原位铝基复合材料的微观结构演变及力学性能

Microstructure Evolution and Mechanical Properties of Al-TiB₂/TiC In Situ Aluminum-Based Composites during Accumulative Roll Bonding (ARB) Process.

作者信息

Nie Jinfeng, Wang Fang, Li Yusheng, Cao Yang, Liu Xiangfa, Zhao Yonghao, Zhu Yuntian

机构信息

Nano Structural Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China.

出版信息

Materials (Basel). 2017 Jan 25;10(2):109. doi: 10.3390/ma10020109.

DOI:10.3390/ma10020109

PMID:28772467

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5459192/

Abstract

In this study, a kind of Al-TiB₂/TiC in situ composite was successfully prepared using the melt reaction method and the accumulative roll-bonding (ARB) technique. The microstructure evolution of the composites with different deformation treatments was characterized using field emission scanning electron microscopy (FESEM) and a transmission electron microscope (TEM). The mechanical properties of the Al-TiB₂/TiC in situ composite were also studied with tensile and microhardness tests. It was found that the distribution of reinforcement particles becomes more homogenous with an increasing ARB cycle. Meanwhile, the mechanical properties showed great improvement during the ARB process. The ultimate tensile strength (UTS) and microhardness of the composites were increased to 173.1 MPa and 63.3 Hv after two ARB cycles, respectively. Furthermore, the strengthening mechanism of the composite was analyzed based on its fracture morphologies.

摘要

在本研究中，采用熔体反应法和累积叠轧（ARB）技术成功制备了一种Al-TiB₂/TiC原位复合材料。利用场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）对经过不同变形处理的复合材料的微观结构演变进行了表征。还通过拉伸和显微硬度测试研究了Al-TiB₂/TiC原位复合材料的力学性能。结果发现，随着ARB循环次数的增加，增强颗粒的分布变得更加均匀。同时，在ARB过程中力学性能有显著提高。经过两个ARB循环后，复合材料的极限抗拉强度（UTS）和显微硬度分别提高到了173.1 MPa和63.3 Hv。此外，基于复合材料的断口形貌分析了其强化机制。