... the unloading simulation. In classic plasticity theory, the unloading of a material after plastic deformation is assumed to be linearly elastic with the stiffness equal to Young’s modulus. However, several experimental investigations have revealed that this is an incorrect assumption. The unloading...

.... The experiments provide the evidence that the addition of Si 3 N 4 can improve the densification kinetics of 420 SS significantly. The 420 SS samples produced by 3DP with 12.5 wt % Si 3 N 4 sintered at 1225 ° C for 6 h yielded 95% relative density, 190 GPa Young’s modulus, and 500 Knoop microhardness without any...

... December 2000 01 March 2002 15 04 2003 atomic force microscopy Young's modulus indentation grinding etching manufacturing processes We measured the nano-hardness of a burn layer on 4340 steel surface utilizing a taper-sectioning procedure that amplified the thickness...