Effects of hot extrusion deformation on microstructure and mechanical properties of the spray-deposition 17 vol.% SiCp/7055Al composite
Open Access
- 1 July 2021
- journal article
- research article
- Published by IOP Publishing in Materials Research Express
- Vol. 8 (7), 076515
- https://doi.org/10.1088/2053-1591/ac128b
Abstract
In this study, the microstructure evolution and mechanical properties under hot extrusion of 17 vol.% SiCp/7055Al composite fabricated through the spray-deposition was investigated by employing the Microscope (SEM), the x-ray diffraction (XRD) and the electron back scattering diffraction (EBSD) under a range of deformation conditions. The extrusion temperature reached 400 °C, 450 °C, 500 °C, and the extrusion ratio was at 9, 13, 20 respectively. As revealed from the results the microstructure evolution and mechanical properties of the composite were affected by the extrusion and the precipitated phase. As indicated from the Optical microscope (OM) and the EBSD analysis, the structure variation of the hot extrusion deformation at 450 °C was mainly the dynamic recovery (DRV). However, the dynamic recrystallization (DRX) was dominating at the extrusion temperature of 500 °C and a ratio of 20. In the DRX process, the dislocation substructures appeared within the grains, to reduce low angle grain boundaries (LAGBs) progressively. The textures with {110} 〈111〉 paralleling to TD and the recrystallization textures {001} 〈100〉 and {124} 〈211〉 were characterized. As indicated from the tensile tests, the extrusion eliminated the preparation defects and accommodated the thermal expansion (CTE) mismatch between the matrix and the SiC particles, thereby improving the performance of the composite.Keywords
Funding Information
- Natural Science Foundation of Chongqing (No. cstc2020jcyj-msxmX0417)
- National Natural Science Foundation of China (No. 51971183)
This publication has 36 references indexed in Scilit:
- Effects of degree of deformation on the microstructure, mechanical properties and texture of hybrid-reinforced titanium matrix compositesActa Materialia, 2012
- A Comparison Between ECAP and Conventional Extrusion for Consolidation of Aluminum Metal Matrix CompositeJournal of Materials Engineering and Performance, 2011
- Effects of Sintering and Extrusion on the Microstructures and Mechanical Properties of a SiC/Al-Cu CompositeJournal of Materials Engineering and Performance, 2011
- Microstructure and Mechanical Properties of Spray Deposition Al/SiCp Composite After Hot ExtrusionJournal of Materials Engineering and Performance, 2011
- Effects of die-pressing pressure and extrusion on the microstructures and mechanical properties of SiC reinforced pure aluminum compositesMaterials & Design (1980-2015), 2010
- Effects of extrusion deformation on mechanical properties of sub-micron Si3N4p/2024 compositeTransactions of Nonferrous Metals Society of China, 2009
- Hot-deformation behaviour of spray-formed 2014 Al+SiCP metal matrix compositesMaterials Science and Engineering: A, 2008
- Effect of hot extrusion on the microstructure of a particulate reinforced magnesium matrix compositeMaterials Science and Engineering: A, 2007
- Rolling and annealing textures of a SiCw/Al compositeMaterials Letters, 2004
- Strength of Al-Zn-Mg-Cu matrix composite reinforced with SiC particlesMetallurgical and Materials Transactions A, 2002