Affiliation:
1. Laboratory of Mechanical Properties of Nanoscale Materials and Superalloys, Belgorod National Research University, Pobeda 85, Belgorod 308015, Russia
Abstract
The purpose of this work was the examination of microstructural evolution during the fabrication of an Al/Al2O3 composite by friction stir processing (FSP). In order to obtain new insight into this process, a longitudinal section of the produced composite was studied, and advanced characterization techniques (including electron backscatter diffraction and microhardness mapping) were applied. It was found that the reinforcing particles rapidly rearranged into the “onion-ring” structure, which was very stable against the subsequent dispersion. Specifically, the remnants of the comparatively coarse-scale particle agglomerations have survived even after 12 FSP passes. Therefore, it was concluded that three or four FSP passes, which are often applied in practice, are not sufficient to provide a homogeneous dispersion of the reinforcing particles. It was also revealed that the gradual distribution of the nanoscale Al2O3 particles throughout the aluminum matrix promoted a subtle reduction in both the portion of high-angle boundaries and the average grain size. These observations were attributed to the particle pinning of grain-boundary migration and dislocation slip.
Funder
Russian Science Foundation
Subject
General Materials Science
Reference54 articles.
1. Particle Reinforced Aluminum and Magnesium Matrix Composites;Lloyd;Int. Mater. Rev.,1994
2. Aluminum Matrix Composites for Industrial Use: Advances and Trends;Mavhungu;Proc. Manuf.,2017
3. P/M Aluminum Matrix Composites: An Overview;Torralba;J. Mater. Proc. Technol.,2003
4. Friction Stir Processing: A Novel Technique for Fabrication of Surface Composite;Mishra;Mater. Sci. Eng. A,2003
5. Surface Composites by Friction Stir Processing: A Review;Sharma;J. Mater. Proc. Technol.,2015
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献