Mechanical properties of engineering materials depend mainly on its microstructure and composition. Transformation of microstructure by imposing thermomechanical process is one of the way of modifying mechanical properties. Thermomechanical techniques are used to obtain optimized grains in the microstructure which can improve the material properties. Cold rolled bulk material having deformed grains exhibit higher strength but limited ductility with respect to coarse grained material. Hence, strained microstructure has not been much successful in attaining both, high strength and ductility. During thermomechanical process microcracks/voids generate under the influence of stress. It is thought that defect healing during plastic flow improve ductility of the processed material. Thermomechanical treatment generates a large fraction of twins in low stacking fault energy materials, which leads to enhanced mechanical properties. A lot of works have been performed to investigate thermomechanical processed materials and on their microstructural and mechanical properties. However, a detailed systematic study on the consequences on microstructural and mechanical inhomogeneity on thermomechanical processed material is still lacking.
The influence of thermo-mechanical processes on the gain size of CuZn10 alloy were investigated. The deformation microstructures of thermomecahnical treated samples were revealed by optical microscope observations. Additionally, the influence of grain size on the mechanical properties were examined by tensile tests. It was seen that the deformed microstructures have significant effects on the grain size optimization. The tensile ductility of the thermomechanical trerated CuZn10 alloy were also improved which is thought to be due to increased deformation uniformity and a higher resistance to crack propagation.
Anahtar Kelimeler: Copper, CuZn10, Thermomechanic, Rolling, Heat Treatment