Random walk analysis of grain motion during superplastic deformation of TZP

T. Okamoto, K. Yasuda, Tadashi Shiota

Research output: Contribution to journalArticle

Abstract

This 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.

Original languageEnglish
Article number012004
JournalJournal of Physics: Conference Series
Volume191
DOIs
Publication statusPublished - Jan 1 2009
Externally publishedYes

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polycrystals
random walk
zirconium oxides
plastics
ceramics
scanning electron microscopy
air
matrices

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Random walk analysis of grain motion during superplastic deformation of TZP. / Okamoto, T.; Yasuda, K.; Shiota, Tadashi.

In: Journal of Physics: Conference Series, Vol. 191, 012004, 01.01.2009.

Research output: Contribution to journalArticle

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