ウェーブレット解析によるAl-Al_3Ni FGM半溶融加工温度条件制御(機械力学,計測,自動制御)

概要

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Semisolid forming for Al-Al_3Ni functionally graded material (FGM) is investigated to detect the optimum operating temperature which can optimize the microstructure of the material. Because it is difficult to identify the optimum operating temperature of Al-Al_3Ni FGM billet when it is set in a container. One of the idea is an application of a wavelet analysis to detect the transition temperature of Al-Al_3Ni FGM billet from solid to semi-solid state. Haar's wavelet function is applied for its simplicity compared with Daubechies' wavelet function. An online wavelet analysis system using Haar's wavelet function is developed and a semisolid forming system to produce an FGM cup is constructed. The system successfully detects a discontinuity of deformation of Al-Al_3Ni FGM with temperature increase under a constant applied load. The idea was confirmed to be suitable from the micro structural observation of formed cup, because the formed cup under the optimum condition was found to have a refined microstructure of Al-Al_3Ni system, which is expected to improve the mechanical properties.
社団法人日本機械学会の論文
2003-05-25