Influence of Silicon on The Composition of The Molten Aluminum Silisium (Al-Si) for Increased Strengt Mechanical of 2 Stroke Motorcycle Piston
Marpaung, Iwan Hermanto
Sembiring, Anwar Dharma
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A study of " Influence of silicon on the composition of the molten aluminum silisium (al-si) for increased strength mechanical of 2 stroke motorcycle piston". Melting is done with conventional methods by means of mixing aluminium with silicon, where silicon varied ranging from 9.7% Si Wt, 10.7% Si Wt, 11.7% Si Wt, 12.7% Si Wt, 13.7% Si Wt, 14,7% Si Wt. From the results of test perfomed, tensil value each 370.87 N/mm2, 372.63 N/mm2, 376.55 N/mm2, 378.82 N/mm2, 373,80 N/mm2 and hardness in value each, 63.5 HRB, 65.5 HRB, HRB 66.44, 67.24 HRB, 68.12 HRB, 65,5 HRB test is increasing but the impact test value each 0.375 J/mm2, 0.355 J/mm2, 0.302 J/mm2, 0.280 J/mm2, 0.250 J/mm2 and 0,215 J/mm2. For XRD observation of crystal structure motorcycle 2 stroke piston is cubic with a = 4, b = 4, 0494A0, 0494A0, and c = 4, 0494A0 with aluminum, silicon. Qualitative observations using SEM-EDX shows that Silicon mixed evenly with aluminum.