The role of vibration and pass number on microstructure and mechanical properties of AZ91/SiC composite layer during friction stir processing

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science - Tập 236 Số 5 - Trang 2312-2326 - 2022
Behrouz Bagheri1, Amin Abdollahzadeh2, Farzaneh Sharifi3, Mahmoud Abbasi4
1Department of Mining and Metallurgy, Amirkabir University of Technology, Tehran, Iran
2Department of Materials Science and Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
3School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, USA
4Faculty of Engineering, University of Kashan, Kashan, Iran

Tóm tắt

In this study, nano-sized SiC particles are added to AZ91 magnesium alloy using friction stir processing (FSP) and friction stir vibration processing (FSVP) to produce surface nano-composite layers. FSVP is a modified method of FSP in which the specimen is vibrated during FSP. The influence of FSP and FSVP pass numbers on mechanical and microstructural behaviors of the developed surfaces is investigated. It is indicated that nano-composite layers produced by FSVP have finer microstructures compared to those produced by FSP, and nano-sized particles are distributed more homogeneously. Furthermore, mechanical properties including hardness, scratch resistance, ductility, and strength of FSV processed specimens, were higher than those related to FS processed specimens. The results show a decline in the porosity content as the FSP passes are increased. Also, the compressive strength of the FSVP-ed composites is higher than those for the FSP-ed samples. It is also noticed that an increase in the vibration frequency during the FSVP process causes a more uniform dispersion of composite particles and thus, decreases particle clustering.

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Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science

Tập 236 Số 5

2312-2326

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