TY - JOUR ID - 34961 TI - THE EFFECT OF HEAT TREATMENT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A356/ZrO2 NANO REINFORCED COMPOSITES JO - The International Conference on Applied Mechanics and Mechanical Engineering JA - AMME LA - en SN - 2636-4352 AU - Tiwery, H. AU - Hoziefa, W. AU - El-Shabasy, Adel B. AU - El-Mahallawi, I. AD - Department of Design and production Engineering. Faculty of Engineering, Ain Shams University, P.O. Box 11517, Cairo, Egypt. AD - Department of Metallurgy, Mining & Petroleum Engineering, Faculty of Engineering, Al- Azhar University, P.O. Box 11884, Cairo, Egypt. AD - Department of Design and production Engineering. Faculty of Engineering Ain Shams University, P.O. Box 11517, Cairo, Egypt. AD - Department of Metallurgical Engineering, Faculty of Engineering, Cairo University, P.O. Box, 12316 Giza, Egypt. Y1 - 2018 PY - 2018 VL - 18 IS - 18th International Conference on Applied Mechanics and Mechanical Engineering. SP - 1 EP - 13 KW - Al-Si alloys KW - Nanocomposite KW - aging DO - 10.21608/amme.2018.34961 N2 - ABSTRACTAluminum A356 alloys have several interesting properties to be used in automobileand aircraft industries. Recent studies have shown that the properties of castaluminum alloys are modified by the insertion of reinforcement nanoparticles. Thisstudy investigates the microstructure and mechanical properties of ZrO2nanoreinforced A356 alloy in T6 heat treated condition. Some samples of as castmonolithic A356 and 3% ZrO2 nanoparticles (30nm) reinforced A356 wereprepared by stir casting from the semi-solid state followed by T6 heat treatmentprocess. The samples were solution treated at temperature of 550°C for 2hoursfollowed by aging at different temperatures (170°C&180°C), for different aging time(2hr,4hr&6hr). The results obtained in this work showed enhancement in themechanical properties (ultimate strength, ductility and hardness). The as castsamples showed values of 119 MPa,4.5% &23 HRB, respectively, while the3%ZrO2 reinforced samples showed the values of 165MPa,4.7% &60 HRB,respectively. After T6 heat treatment, the same values changed to 198MPa, 6.4%&70HRB, respectively for the nanoreinforced samples. The microstructuremorphology was changed from lamellar eutectic structure to spheriodized eutecticstructure. UR - https://amme.journals.ekb.eg/article_34961.html L1 - https://amme.journals.ekb.eg/article_34961_717e53cebc79caab4c711ff6bb8d8409.pdf ER -