We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
On the microstructure, mechanical behaviour and damping characteristics of AleZn based composites reinforced with martensitic stainless steel (410L) and silicon carbide particulates.
- Authors
Joshua, Theo Oluwasegun; Alaneme, Kenneth Kanayo; Bodunrin, Michael Oluwatosin; Omotoyinbo, Joseph A.
- Abstract
The microstructural characteristics, mechanical and damping properties of AleZn based composites reinforced with 6, 8, and 10 wt% martensitic stainless steel (SS) and 10 wt% silicon carbide (SiC) were investigated. The composites were produced via double stir casting process, and structural assessment was undertaken with the use of scanning electron microscopy (SEM) and X-ray diffraction analysis. The mechanical properties (hardness and tensile properties) and damping behaviour were also evaluated. The microstructures showed well delineated particles varied particle size and dispersion patterns, while the XRD results indicated marginal presence of reaction induced intermetallic phases. Relative to the unreinforced AleZn alloy, the hardness, ultimate tensile strength (UTS), specific strength improved with increase in SS wt. % (18%, 26%, 44% for hardness; 33%, 40%, 51% for UTS; and 19%, 28%, 47% for specific strength, for 6, 8, and 10 wt% SS particles, respectively). Also, all the AleZn/SS composite grades had strength and ductility characteristics superior to that of the AleZn/SiC composite. Particle and interface strengthening, was linked to the improved strength offered by these grades of composites, while more uniform strain distribution due to the inherent ductile and deformable nature of the SS particles, attested to by the relatively higher signs of dimple fractures; was linked to the superior ductility. The damping capacities of all the AleZn based composites were higher than that of the unreinforced AleZn alloy, with the inherent damping capacities of constituents, constituent weight proportions, particle/interface mobility sensitivity to temperature, and dislocation damping effects, linked to the variations in damping behaviour exhibited by the AleZn based composites.
- Subjects
MARTENSITIC stainless steel; MICROSTRUCTURE; MECHANICAL behavior of materials; SILICON carbide; TENSILE strength
- Publication
International Journal of Lightweight Materials & Manufacture, 2022, Vol 5, Issue 3, p279
- ISSN
2589-7225
- Publication type
Article
- DOI
10.1016/j.ijlmm.2022.02.005