期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 284, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2022.126068
关键词
Bimetal composite; Wear; Stainless steel; Aluminum; Corrosion
资金
- Yildiz Technical University Scientific Research Projects Coordination Department [FDK-2017-3241]
304 stainless steel/A356 aluminum bimetal composites were successfully manufactured by using chips as reinforcing material, achieving low-cost and environmentally friendly production. The volume fractions of stainless steel chips had an impact on the microstructure, interfacial characteristics, tribological properties, and anti-corrosion features of the composites.
304 stainless steel (SS)/A356 aluminum bimetal composites were manufactured by vacuum-assisted melt infiltration casting successfully. SS chips with different volume fractions of 35%, 50%, 60%, and 65% were used in a composite structure. Low-cost, environmentally friendly production was achieved by using chips as reinforcing material. Dry sliding ball-on-disc tests were performed against Al(4)O3 ball under a load of 10 N. Potentiodynamic polarization analysis was carried out in 3.5% NaCl solution. theta (Fe4Al13) and eta (Fe2Al5) phases developed at the SS/Al interfaces. Abrasive and adhesive wear predominated worn surfaces, whereas galvanic and pitting corrosion mechanisms originated during potentiodynamic polarization tests. Lower volume fractions of SS chips resulted in microploughing, while their higher amounts caused microcutting during sliding. Moreover, the samples containing 60% and 65% SS failed in the corrosion tests due to the lack of passivation. The most suitable SS ratio was determined to be 50%, considering microstructural, interfacial, tribological, and anti-corrosion features of SS/Al bimetal composites.
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