Structure Optimized Design Of Ni/TiC Functional Gradient Materials By Laser Rapid Forming Method

Functional gradient material (FGM) is on the basis of the computer aideddesign (cad) materials using the advanced material’ composition technology,which makes the composition elements (component and structure) changecontinuously from one side to the other side along the thickness direction.Ni/TiC has become the research hotspots because of high-temperatureresistance, corrosion resistance and etc. This paper is mainly aimed to makefull use of the super manufacture ability of DLF, high-temperature resistant ofTiC and high specific strength of Ni to manufacture the Ni/TiC FGM with thelowest thermal residual stress.The themal physical properties differencebetween the ceramics and the metal can obtain full compensation due to theinterface interlayer, hoping to get the advances with properties of higherstrength, better facture toughness and the themal stress relaxtion and can beapplied to high-temperature structural material、new tools and vehicle engineetc.In the whole design process, the composition and structure of FGM areoptimized by simulating of thermal stress according to the practicalpreparation and working conditions to obtain the eligible material.The key parameters, including composition distribution exponent, thethickness and number of layers, are determined to get the maximum mitigatinggradient of FGM stress for Ni/TiC by analyzing the remnant stress results ofcooled FGM manufactured by DLF.The simulation method mentioned,based on ANSYS program,is used tosimulate FGM thermal stress of different material under different initial stateby changing parts of parameters,and it also offers a general method forstructural optimized design of thermal stress released FGM...