TiB2/42CrMo continuous gradient material mechanics analysis and structure design

Abstract:

In previous superheavy force field gradient materials on the basis of optimizing the process parameters of preparation, we prepared TiB₂-TiC-Fe component a continuous gradient variation of TiB2/42CrMo composite materials.By XRD, SEM observation of the gradient layer of ceramic/metal alloy phase boundary between a continuous gradient variation.Through hardness testing, the hardness of the ceramic to metal parts are diminishing gradient change, the elastic modulus variation of intermediate gradient layer form closer to trigonometric functions.In the related parameters based on the study of the extraction, laminar strength analytical model is established.After adopting ANSYS finite element simulation method, the simulation analysis of the displacement in applying external loading conditions, a layered model of normal stress and shear stress distribution, the gradient materials is obtained at the bottom of the maximum tensile stress of the metal on the type of material damage, the main reasons for the failure and the actual material corresponding to the three point bending experiment phenomenon.Finally, research materials long thick ratio on the stress distribution, it is concluded that in a certain scale, gradient material mechanical properties not increases with the increase of the ratio of long thick linear infinite, for engineering materials design has certain guiding significance to the next.

Key words:TiB2/42CrMo gradient materials; stress distribution; layered design; simulation analysis