Thixotropic compression tests were carried out on 9Cr18 semi-solid alloy through Gleeble-1500 thermal simulation machine.According to the experiment analysis,macro separation occurred during thixoforming.The liq-uid film was extruded outside to the surface and solidified to form eutectic structure.The solid particles were con-nected with each other and underwent plastic deformation.According to the comparison between Zhou-Guan model and modified Zhou-Guan model,it could be observed that the adding of thixotropic factor played an important role in the regression and the latter one was more credible.The modified Zhou-Guan model could well describe the thixo-forming behavior.3D forecast mapping was built for 9Cr18 semi-solid alloy in thixoforming temperature range.It would provide valuable information for selecting process parameters during thixoforming in the manufacture process.
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