Study on Slip Behaviour of Surface Grains in an Al-Mg-Si Alloy Extruded Sheet during Tensile Deformation at Cryogenic Temperature
Interrupted tensile tests were performed on an Al-Mg-Si alloy extruded sheet at cryogenic temperature of 77 K.After each deformation step,the crystallographic feature of the sample in a same area were obtained by Electron Backscatter Diffraction(EBSD)for different deformation extent,so as to study the grain deformation behavior on the surface of the sample.The results show that the surface topography for grains of different orientations is obviously different after the tensile test,and the maximum Schmid factor and the number of activated slip systems play a crucial role in the deformation behavior.
NETL
NSTL
万方数据
