WEAR BEHAVIOR OF AZ91D MAGNESIUM COMPOSITE

Yıl 2015, Cilt: 33 Sayı: 3, 465 - 471, 01.09.2015

Yaman Erarslan Cem Akça

Öz

AZ91D alloy was produced using the conventional casting methods in a local foundry. Then, SiC ceramic additive materials (particulates) with 2%, 4% and 8% by weight (average grain size of 7 µm and 32 µm) were mixed with AZ91 alloy by stir-casting method. The properties of the AZ91 alloy and AZ91/SiC composite materials produced were determined by means of hardness and wear tests, and microstructural characterization was conducted by optical microscopy, scanning electron microscopy and x-ray diffraction. It was observed that the improvement in hardness for the composite with a diameter of 7 µm diameter is higher than the composite with a diameter of 32 µm. Wear testing was conducted through the ball-on-disc method at a rate of 10 cm.s-1 under a load of 5 N. The friction coefficient was found to be between the 0.115-0.172 intervals, and no wear was observed on the alumina (Al2O3) ball material.

Anahtar Kelimeler

AZ91 alloy, metal matrix composite, wear

Kaynakça

• [1] Ruden TJ, Albright DL. “Magnesium Castings For Auto Applications”, Adv Mater Process; 145:28-32, 1994
• [2] Cole G. Mg “Components For Automotive Body, Chassis, And Powertrain”, Dearborn, MI: Ford Motor Company; 1997.
• [3] B.L. Mordike, T. Ebert. “Magnesium Properties-applications-potential”. Materials Science and Engineering App. 37-45, 2001.
• [4] Aghion, E., et al. “Newly Developed Magnesium Alloys for Powertrain Applications. s.l.: JOM” s. 30-33, 2003.
• [5] Wang H.Y, Jiang Q.C, Zhao Y.Q, Zhao F, Ma B.X, Wang Y. “Fabrication of TiB2 and TiB2-TiC Particulates Reinforced Magnesium Matrix Composites”, Mater Sci Eng;372:109-14, A, 2004.
• [6] Angion, E., Bronfin, B. ve Eliezer, D. “The Role Of The Magnesium İndustry İn Protecting The Environment”, Journal of Materials Processing Technology., 117, s. 381-385, 2001.
• [7] Lloyd, D.J. ve Jin, I. “Melt Processed Aluminum Matrix Particle Reinforced Composites”, Comprehensive Composite Materials, Vol.3, Metal Matrix Composites, Elsevier, New York, 555-575, 2000.
• [8] Gupta, M. ve Sharon, N. Mui L. “Magnesium, Magnesium Alloys, and Magnesium Composites”, New Jersey : John Wiley & Sons, Inc., 2011.