The new computer-aided optimization system for transient liquid phase (TLP) bonding process which integrated the alloy design of insert metal and optimization of bonding process has been developed. The present system consisted of three main systems, i.e. a supporting system for planning the experiments, that for alloy-designing the insert metal and that for optimizing the TLP-bonding process which involved a formulation by radial basis function network with Bayesian inference, a search of extremal by the genetic algorithm and a multi-objective optimization by the satisfying trade-off method. The optimization of TLP-bonding process for directionally solidified Ni-base superalioy, IN738LC has been carried out. The chemical composition of Ni-3.0%Cr-8.1 %Si-1.0%B and the bonding condition of 1433K × 5.6ks were determined as the optimal insert metal and processing parameters, respectively. The elevated temperature tensile strength and impact absorbed energy were superior to the base metal at the optimized solutions.
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