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Superplastic Deformation of Zinc Sulfide Near Its Transformation Temperature [1020°]
Author(s) -
Xue Liang A.,
Raj Rishi
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb05980.x
Subject(s) - superplasticity , materials science , flow stress , strain rate , crystallite , dynamic recrystallization , recrystallization (geology) , metallurgy , deformation (meteorology) , grain size , composite material , hot working , microstructure , geology , paleontology
Polycrystalline ZnS was deformed in compression to large strains (up to 100%), near its α⇄β transformation temperature (1020°), at strain rates that ranged from 10 −5 to 3 × 10 −3 s −1 . The flow stress showed a minimum near 1020°. The strain rate sensitivity and the grain size dependence of the flow stress suggest a superplastic mechanism of deformation. There was some evidence of dynamic recrystallization and stress‐induced β (fcc) to α (hcp) phase transformation. The polycrystals had a tendency to form in tergranular cavities at the higher temperatures and at faster strain rates.