A Comparative Study of Existing and Newly Proposed Models for Creep Deformation and Life Prediction of Si N

J-L Ding; KC Liu; CR Brinkman

doi:10.1520/STP12775S

SYMPOSIA PAPER Published: 01 January 1994

STP12775S

A Comparative Study of Existing and Newly Proposed Models for Creep Deformation and Life Prediction of Si N

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This paper summarizes recent experimental results, obtained at Oak Ridge National Laboratory (ORNL), on creep behavior and creep rupture of a commercial grade of Si₃N₄ ceramic in the temperature range of 1150°C to 1300°C. A uniaxial model capable of describing the behavior under general thermomechanical loading is introduced and compared with existing models. An exploratory extension of the new model to a multiaxial form is then discussed. Issues are also discussed concerning the standardization of data analysis methodology and future research needs in the area related to development of creep database and life prediction methodology for high temperature structural ceramics.

Author Information

Ding, J-L

Washington State University, Pullman, WA

Liu, KC

Oak Ridge National Laboratory, Oak Ridge, TN

Brinkman, CR

Oak Ridge National Laboratory, Oak Ridge, TN

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Details

Developed by Committee: C28

Pages: 62–83

DOI: 10.1520/STP12775S

ISBN-EB: 978-0-8031-5268-7

ISBN-13: 978-0-8031-1864-5

A Comparative Study of Existing and Newly Proposed Models for Creep Deformation and Life Prediction of Si N

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