An Al-12Si/ZnS powder inoculant for eutectic silicon in Al-12Si alloy

Structure of molten Al and eutectic Al–Si alloy studied by neutron diffraction

Production of silicon carbide Al 2124 alloy functionally graded materials by mechanical powder metallurgy technique

ub lis he d by M an ey P ub lis hi ng ( c) IO M C om m un ic at io ns L td A mechanical powder metallurgy process involving a vibration stage before cold and hot compaction has been developed to manufacture functionally graded materials (FGMs). The microstructure and mechanical properties of p 2124 FGMs produced by this process have been studied. It was found that the vibration stage modified t...

Metallurgical Parameters Controlling the Eutectic Silicon Charateristics in Be-Treated Al-Si-Mg Alloys

The present work was carried out on Al-7%Si-0.4%Mg-X alloy (where X = Mg, Fe, Sr or Be), where the effect of solidification rate on the eutectic silicon characteristics was investigated. Two solidification rates corresponding to dendrite arm spacings (DAS) of 24 and 65 μm were employed. Samples with 24 μm DAS were solution heat-treated at 540 °C for 5 and 12 h prior to quenching in warm water a...

Mechanical Equation of State in an Al-Li Alloy

Existence of plastic equation of state has been investigated by performing a series of load relaxation tests at various temperatures using an Al-Li alloy. A plastic equation of state is first developed from a simple kinetics consideration for a mechanical activation process of a leading dislocation piled up against grain boundaries. A series of load relaxation test has been conducted at tempera...

Growth directions in directionally solidified Al–Zn and Zn–Al alloys near eutectic composition

Growth directions and crystallographic orientations of solidification microstructures have been measured in Al–Zn alloy near the eutectic composition. Al dendrites in Al–92 wt.% Zn alloy were found to grow along the h110i directions while Zn dendrites in Al– 96 and 98 wt.% Zn have h10 10i trunks. In the lamellar eutectic, a crystallographic relationship has been found between the dense plane of...