Creep Curve Modeling to Generate the Isochronous Stress-Strain Curve of Type 316LN Stainless Steel
| Periodical | Key Engineering Materials (Volumes 385 - 387) |
|---|---|
| Main Theme | Advances in Fracture and Damage Mechanics VII |
| 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 | Song Nan Yin et al., 2008, Key Engineering Materials, 385-387, 705 |
| Online since | July, 2008 |
| Authors | Song Nan Yin, Woo Gon Kim, Ik Hee Jung, Yong Wan Kim, Seon Jin Kim |
| Keywords | Creep Curve, Garofalo Model, Isochronous Stress-Strain Curve, Nonlinear Least Square Fitting (NLSF), Type 316LN Stainless Steel |
| Price | US$ 28,- |
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.