Creep Curve Modeling to Generate the Isochronous Stress-Strain Curve of Type 316LN Stainless Steel

Abstract:

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An isochronous stress-strain curve (ISSC) needs to be generated for a creep design application for high-temperature materials. To generate the ISSC for type 316LN stainless steel (SS), a series of creep data, which was obtained from creep tests with different stress levels at 600oC, was used. Creep curves were modeled by means of a nonlinear least square fitting (NLSF) of the Garofalo model. In the fitting of the creep curve, a secondary creep region was separated into first and second phases, and its fitting range was suitable to use for the first phase. The Garofalo model revealed a good agreement with the experimental creep data, and its parameters, P1, P2 and P3 revealed a good linear relationship as a function of a stress. The ISSCs for type 316LN SS at 600oC were successfully generated up to 300,000 hours.

Info:

Periodical:

Key Engineering Materials (Volumes 385-387)

Edited by:

H.S. Lee, I.S. Yoon and M.H. Aliabadi

Pages:

705-708

DOI:

10.4028/www.scientific.net/KEM.385-387.705

Citation:

S. N. Yin et al., "Creep Curve Modeling to Generate the Isochronous Stress-Strain Curve of Type 316LN Stainless Steel", Key Engineering Materials, Vols. 385-387, pp. 705-708, 2008

Online since:

July 2008

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Price:

$35.00

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