Mechanical and Damping Properties of Fullerene-Dispersed AZ91 Magnesium Alloy Composites Processed by a Powder Metallurgy Route

Abstract

The microstructures and mechanical properties of fullerene powder dispersed AZ91 magnesium alloy composites were examined. The AZ91 with 0, 1 and 5 mass% fullerene additions were produced by extruding a mixture of AZ91 machined chips and fullerene powder. The matrix grains of the extruded materials were equiaxed, and the size was $ 5 mm irrespective of the fullerene content. The agglomerated fullerene powder was aligned parallel to the extrusion direction in the composites. The addition of 1 mass% fullerene had little effect on the elastic moduli, tensile strength and ductility, whereas the addition of 5 mass% fullerene slightly decreased them. A comparison between the tensile properties of the present composites and those of AZ91 alloys processed by various methods was also made. The damping capacity increased steeply by the fullerene addition. The effectiveness of the fullerene addition for the enhancement of the damping capacity of metallic alloys was verified. A good combination of damping capacity, elastic moduli, strength and ductility was attained in the present composites.

Optimization of Magnesium Alloy Wheel Dynamic Impact Performance

“…Numerous researchers have tested the damping properties of various magnesium and magnesium alloy materials with different structures (such as porous structure) and have obtained a variety of performances related to damping. e examples also include the damping material for performance research such as vibration and frequency response [30][31][32][33][34][35]. e performance test data characteristics are essentially in line with the G-L dislocation pinning theory model.…”

Hot deformation behaviour of as-extruded micrometre SiCp reinforced AZ91 composite

“…3b, which corresponds to the pipe diffusion of magnesium (92 kJ mol 21 ). 20 On Liu et al's investigation of as-cast AZ91 alloy, the calculated Q value is ,176 kJ mol 21 . 10 The high Q value (,188 kJ mol 21 ) is also obtained by Zhou et al on the as-cast AZ91 alloy.…”

Sıcak Presleme Yöntemi ile AZ91 Magnezyum Alaşımının Üretimi

“…Literatürde AZ91 alaşımlarının toz metalurjisi ile üretilmelerini konu edinen son derece sınırlı sayıda yayın bulunmaktadır [10][11][12][13]. AZ91 matrisli kompozitlerin üretilmesinde ise dökümde karşılaşılan sorunlar yüzünden toz metalurjisi yöntemlerinin sıklıkla kullanıldığı görülmektedir [14][15][16][17][18]. Mg ve alaşımlarının üretiminde toz metalürjisinin tercih edilmemesinin iki temel nedeni bulunmaktadır.…”