Use of the Niyama criterion to predict porosity of the mushy zone with deformation

• Autorzy: Polyakov S. , Korotchenko A. , Bast J.
• Języki publikacji: EN

Abstrakty

EN

The article presents new results on the use of the Niyama criterion to estimate porosity appearance in castings under hindered shrinkage. The effect of deformation of the mushy zone on filtration is shown. A new form of the Niyama criterion accounting for the hindered shrinkage and the range of deformation localization has been obtained. The results of this study are illustrated by the example of the Niyama criterion calculated for Al-Cu alloys under different diffusion conditions of solidification and rate of deformation in the mushy zone. Derived equations can be used in a mathematical model of the casting solidification as well as for interpretation of the simulation results of casting solidification under hindered shrinkage. The presented study resulted in a new procedure of using the Niyama criterion under mushy zone deformation.

Słowa kluczowe

EN

solidification; deformation; mushy zone; Niyama criterion; filtration condition; hindered shrinkage

PL

krzepnięcie; odkształcenie; strefa półciekła; kryterium Niyamy

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2011
• Tom: Vol. 11, iss. 4
• Strony: 131--136
• Opis fizyczny: Bibliogr. 17 poz., rys., tab., wykr.

Twórcy

autor

Polyakov S.

autor

Korotchenko A.

autor

Bast J.

• Institute of Mechanical Engineering: Field of Study - Steel Works Machines, Foundry Machines and forming Machines (HGUM), TU Bergakademie Freiberg, Akademiestrasse 6, 09596 Freiberg/Sachs, Germany,

Bibliografia

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