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Constitutive Modeling for Thixoforming of 9Cr18 Semi-solid Alloy and 3D Forecast Mapping

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Abstract

Thixotropic compression tests were carried out on 9Crl8 semi-solid alloy through Gleeble–1500 thermal simulation machine. According to the experiment analysis, macro separation occurred during thixoforming. The liquid film was extruded outside to the surface and solidified to form eutectic structure. The solid particles were connected 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 thixoforming 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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Authors and Affiliations

  1. School of Materials Science and Engineering, University of Science and Technology Beijing, 100083, Beijing, China

    Ya-ping Li (Doctor Candidate), Ren-bo Song (Doctor, Professor) & Yong-jin Wang

Authors
  1. Ya-ping Li
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  2. Ren-bo Song
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  3. Yong-jin Wang
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Correspondence to Ya-ping Li or Ren-bo Song.

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Foundation Item: Item Sponsored by National Natural Science Foundation of China (51175036)

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Li, Yp., Song, Rb. & Wang, Yj. Constitutive Modeling for Thixoforming of 9Cr18 Semi-solid Alloy and 3D Forecast Mapping. J. Iron Steel Res. Int. 23, 1309–1315 (2016). https://doi.org/10.1016/S1006-706X(16)30193-5

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  • DOI: https://doi.org/10.1016/S1006-706X(16)30193-5

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