Influence of Ni Microalloying on the Microstructure and Properties of Continuous Casting and Conform Continuous Extruded 6201 Aluminum Alloys
The continuous casting and continuous extrusion processes were used to prepare 6201 aluminum alloy wires.Electron backscattering diffraction,transmission electron microscopy,hardness,tensile,and conductivity tests were used to study the effects of Ni microalloying on the microstructure,mechanical properties,and conductivity of 6201 aluminum alloy.The results show that Ni microalloying refins the grain size of 6201 aluminum alloy in continuous casting,continuous extrusion and solid solution treatment states,which in turn improved the strength.During the aging process,Ni microalloying accelerated the age-hardening behavior of 6201 aluminum alloy,which increase the peak hardness and strength while retaining plasticity.But it decrease the electrical conductivity of the alloy because the Ni atoms always existed in the form of a solid solution,increasing the density of β"-precipitates and refined the size.The optimum yield and tensile strengths of 295.33 MPa and 326.12 MPa,respectively,are obtained by Ni microalloying and optimization of the heat treatment process.
Al alloycontinuous castcontinuous extrusionmicrostructureproperties
万方数据
维普
