Role of Gd addition on machinability of Al-15%Mg2Si in-situ composite during dry turning

Abstract

Recently, Al-Mg2Si in-situ composites have achieved considerable attention due to their excellent physical and mechanical properties. In fact, there are some limitations of knowledge regarding the machinability characteristics of these composites - particularly when being inoculated with rare earth additions. This study in turn aimed to investigate the influence of machining parameters as well as Gd addition on the machinability of Al-15%Mg2Si composite. To examine the effect of modifier (1.0 wt. % Gd) and machining parameters (feed rate, cutting speed), microstructural evolution, surface roughness (Ra) and cutting force (Fc) were evaluated during dry turning. The results revealed that Gd addition as modifier element led to better surface roughness and higher cutting force owning to the modification of Mg2Si particle structure as well as the formation of Gd intermetallic compounds.

A literature review on Al-Si alloy matrix based in situ Al-Mg2Si FG-composites: Synthesis, microstructure features, and mechanical characteristics

“…[80][81][82][83] For the manufacture of FGMs depending on multiple types of metal-intermetallic and metal-ceramic materials, centrifugal casting is commonly used. [84][85][86][87][88][89][90][91] This approach is capable of mass production as well as fine control and uniform distribution in the second phase. The gradient structures are influenced by the heating/cooling control systems including the mold rotating speed.…”