| The Effect of the Number of Passes of Friction Stir Processing (FSP) on Microstructure and Hardness of AZ31/SiO2/Graphite Hybrid Nanocomposite |
| Paper ID : 1215-UFGNSM-FULL |
| Authors: |
|
Mehdi Rezaeian-Delouei *1, Hassan Abdollah-pour2, Mohammad Tajally2, Seyyed Mostafa Mousavizade3 1no. 47, 13 Emamat st., Gonabad, Khorasan-E-Razavi 2Materials Science and Engineering Department, Faculty of Materials & Metallurgical Engineering, Semnan University, Semnan, 3513119111, Iran 3Materials Science and Engineering Department, Faculty of Engineering, Hakim Sabzevari University, Sabzevar, 9617976487, Iran |
| Abstract: |
| Magnesium alloys are very useful materials in aerospace and automobile industries because of their low density; however, these alloys do not have desirable mechanical properties such as hardness and wear resistance. Fabricating composite structures has been one of the most common methods of modifying such properties. Friction stir processing (FSP), as a solid-state method for producing surface composites, has attracted a lot of attention because of its low operating temperature. In the present research, FSP was used to fabricate surface hybrid nanocomposite on AZ31 magnesium alloy plate. A mixture of SiO2 nanoparticles (20–30nm) and graphite nanoparticles (10–80nm) was used as the reinforcement. It was revealed that the average grain size of the stir zone with SiO2–Gr particles was obviously smaller than the average grain size of the stir zone without SiO2–Gr particles. Furthermore, nanoparticle distribution was promoted by increasing FSP passes. The microhardness of the stir zone increased by about 30% due to grain refinement and the distribution of SiO2 and Graphite particles. |
| Keywords: |
| Friction stir processing (FSP), surface hybrid nanocomposite, sillica, graphite, microhardness |
| Status : Paper Accepted (Poster Presentation) |
