Papers by Keyword: Particulate Metal Matrix Composites

Abstract: In the present review a generalized view of sintering mechanism on the basis of the electronic nature of the chemical species involved has been highlighted. The stable electronic configuration model proposed by G.V.Samsonov is one of the models. In spite of the fact that the model is qualitative, its far reaching impact in explaining liquid phase sintering and activated sintering of real systems can not be minimized. In a way the model holds a premium in its predictive nature , which is so crucial not only in sintering processing, but also in alloy design based on metallic or ceramic systems or composites constituted out of these.

Abstract: In this work the fatigue crack growth properties of friction stir welded butt joints are evaluated. Fatigue Crack Growth (FCG) tests have been carried out on two particle-reinforced aluminium alloys (AA6061/Al2O3/20p and AA7005/Al2O3/10p). FCG properties have been evaluated at the centre and at the side of the weld, respectively. The results are compared with FCG properties of base materials. The role of alumina in particles inside the matrix is evident in the threshold region: this can be explained in terms of Roughness Induced Crack Closure.