0105613 - UJF-V 20043172 RIV JP eng J - Journal Article
Harjo, S. - Šaroun, Jan - Motohashi, Y. - Kojima, N. - Ryukhtin, Vasyl - Strunz, Pavel - Baron, M. - Loidl, R.
Flat cavities formed in TZP caused by superplastic deformations at high strain-rates and their effect on elongation.
[Formování plochých kavit v TZP při vysokých rychlostech superplastické deformace a jejich vliv na celkové protažení.]
Materials Transactions. Roč. 45, č. 45 (2004), s. 824-832. ISSN 1345-9678. E-ISSN 1347-5320
Institutional research plan: CEZ:AV0Z1048901
Keywords : angle neutron-scattering
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.120, year: 2004

Cavitation in a superplastic 3Y-TZP pulled under different temperature and strain-rate conditions was analyzed by means of SANS techniques. In high strain-rate deformations, the formation of crack-like flat cavities with their flat surfaces lying roughly normal to the tensile axis was found, in addition to conventional cavities slightly elongated along the tensile direction having been frequently observed in superplastically deformed 3Y-TZP. Coalescence of the nearby crack-like flat cavities during the high strain-rate deformations gave rise to the generation of large brittle-like cracks, which led to an earlier fracture without apparent occurrence of necking. A mechanism for the formation of the flat cavities and their effect on the elongation are discussed.

Článek pojednává o formování plochých kavit v TZP při vysokých rychlostech superplastické deformace a jejich vlivu na celkové protažení.
Permanent Link: http://hdl.handle.net/11104/0012847