T Okamoto et al 2009 J. Phys.: Conf. Ser. 191 012004 doi:10.1088/1742-6596/191/1/012004
T Okamoto, K Yasuda and T Shiota
Show affiliationsThis study focuses on grain motion in TZP (Tetragonal Zirconia Polycrystal) ceramics during superplastic deformation. The specimen was 16 times elongated repeatedly at 1400°C in air. The increment of true plastic strain was set to be 2%, and the specimen was deformed up to 30.3% true plastic strain finally. After each deformation, displacement vectors of specified 748 grains were measured from their position vectors determined by FE-SEM micrographs. As a result, the grains move to the tensile loading direction in zigzag way. And also, the zigzag motion changes with plastic strain: The grains move randomly (random walk motion) by the first 15% true plastic strain, and then grain motion becomes spatially uniform gradually. It is related to changes of constraint of surrounding matrix.
Issue 1 (2009)
T Okamoto et al 2009 J. Phys.: Conf. Ser. 191 012004
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