Interfacial and fracture behavior of short-fibers reinforced AE44 based magnesium matrix composites

Magnesium Alloys Based Composites

“…The fracture mechanism of Mg-MMCs was controlled by fiber/matrix interface and fiber breakage (see also Hu et al, 2010). The Mg matrix exhibits a slightly plastically deformed fracture surface at and above 200 °C.…”

Light Metal Matrix Composites

“…Some studies also use carbon fibers; however carbon has poor wetting characteristics with Mg, and in the absence of surface modification of the fiber it results in interface debonding, and is ineffective as reinforcement. Hu et al (2010) investigated the influence of interfacial properties on the mechanical and in situ fracture behavior of saffil alumina short-fiber-reinforced AE44 (Mg-4.0Al-4.1RE-0.3Mn) composite. Interfacial studies indicated that the SiO 2 binder in the preform reacted with molten Mg during infiltration and formed MgO.…”

Processing and Mechanical Properties of Ti2AlC MAX Phase Reinforced AE44 Magnesium Composite

“…Introducing other elements into Mg alloys using alloy design methods can ameliorate stiffness and mechanical properties of the pure metal at high temperatures. For example, by adding 4% RE (rare earth metal) into Mg alloys to form the AE44 alloy (4% Al and 4% RE) [3,4], the new formed Al x Re y (Al 11 Re 3 ) phase could stabilize Mg 17 Al 12 phases at high temperatures [5]. However, the stiffness and wear resistance of magnesium alloys are still relatively low, and the application of Mg alloys into automobile cylinders is still restricted due to requirements of high stiffness, wear resistance, and lubrication capacity at elevated temperatures.…”

“…To overcome these restrictions, particularly regarding simultaneously enhancing the stiffness and superior wear resistance of Mg alloys, the onlyffective method is to fabricate magnesium composites by introducing ceramic particles into Mg alloys [6][7][8]. Until now, the most widely-used reinforcements in Mg matrices are SiC [9,10], Al 2 O 3 [5] and graphite particulates [11][12][13]. SiC and Al 2 O 3 particles can strongly improve the mechanical properties and wear resistance of the matrix [14][15][16], though the damping and self-lubricating capacities of magnesium composites are reduced [12].…”