scholarly journals Casting and Applications of Functionally Graded Metal Matrix Composites

2018 ◽  
Author(s):  
Williams S. Ebhota ◽  
Tien-Chen Jen
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Functionally Graded ◽  
Matrix Composites

Composite Peening - A Novel Processing Technology for Graded Reinforced Aluminium Matrix Composites

2017 ◽  
Vol 742 ◽  
pp. 137-144 ◽  
Author(s):  
Michael Seitz ◽  
Andreas Reeb ◽  
Alexander Klumpp ◽  
Kay André Weidenmann
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Solid Phase ◽  
Base Material ◽  
Functionally Graded ◽  
Matrix Composites ◽  
Ceramic Particles ◽  
Novel Processing ◽  
Material Utilization ◽  
Stressed Component

Recently, the attention paid to Metal Matrix Composites (MMCs) has increased markedly. In particular, particle-reinforced MMCs are outstanding due to superior specific properties and their wear resistance. In order to further improve material utilization, recent investigations with local reinforcements in highly stressed component sections, the so-called Functionally Graded Metal Matrix Composites (FGMMC), are concerned. The production of such FGMMC was realized with composite peening - a modified process on the basis of micro shot peening. Due to this solid-phase process, ceramic particles can be introduced into regions close to the boundary layer. As preliminary studies on tin show, ceramic particles can be introduced close to the specimen surface even at room temperature. By varying process parameters, in particular by increasing the temperature, the penetration depth of the particles can be significantly increased. In case of aluminium as base material, an input of particles into the surface could be observed at a process temperature of 150 °C. The combination of aluminium with reinforced ceramic particles makes this process interesting for lightweight, wear-resistant and cyclically highly stressed structural components. Using composite peening to produce FGMMCs is a novel, economic approach.

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