| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Innovative Process Design and Processing for Advanced Structural Materials
|
| Presentation Title |
Residual Stress in Steel H-beam Produced by Hot-rolling and QST Investigated by Instrumented Indentation Testing |
| Author(s) |
So-Hyeon Lee, Eunji Song, Gyeong-Seok Hwang, Ju-Young Kim |
| On-Site Speaker (Planned) |
So-Hyeon Lee |
| Abstract Scope |
H-beam for marine is produced by hot-rolling and QST(Quenching and Self-Tempering) process for improving low-temperature toughness due to degradation of mechanical properties at low temperature. However, there is a critical issue that residual stress is involved during the production process. Therefore, measurement of residual stress is very important since unexpected failure can occur under the lower applied load than estimated yield strength by residual stress. In this study, we suggest method of estimating residual stress of hot-rolling and QST processed H-beam with non-destructive instrumented indentation testing. we measured pile-up in direction of principal residual and obtained degree of pile-up versus residual stress curve. By using this curve, we could estimate the residual stress of H-beam using pile-up calculated from indentation curve without stress-free sample.
This work was supported by Korea Evaluation Institute of Industrial Technology(KEIT) program (20010453, 20011735) funded by the Ministry of Trade, Industry and Energy (MOTIE, Korea). |