Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8012214 | Transactions of Nonferrous Metals Society of China | 2016 | 9 Pages |
Abstract
A sophisticated stir casting route to fabricate large scale AA6061-31%B4C composite was developed. Key process parameters were studied, microstructure and mechanical properties of the composite were investigated. The results indicated that vacuum stirring/casting, B4C/Mg feeding and ingots cooling were essential to the successful fabrication of AA6061-31%B4C composite. Chemical erosion examination verified the designed B4C content; X-ray fluorescence spectrometer (XFS) showed the chemical composition of Mg and Si in the matrix conformed to industry standards; scanning electronic microscope (SEM) and X-ray diffraction (XRD) revealed that B4C particles were evenly distributed in the composites with well dispersed Mg2Si precipitates. Tensile testing results showed that the AA6061-31%B4C composite had a tensile strength of 340 MPa, improved by 112.5% compared with AA1100-31%B4C composite, which is attributed to the enhanced strength of the matrix alloy.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yu LI, Qiu-lin LI, Dong LI, Wei LIU, Guo-gang SHU,