| Title |
Small Punch Creep Behavior Analysis for Assessment of Creep Properties |
| Authors |
임병수(Byeong Soo Lim); 김범준(Bum Joon Kim); 김문기(Moon K Kim); 임지우(Ji Woo Im) |
| DOI |
https://doi.org/10.3365/KJMM.2010.48.11.965 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
alloys; creep; recovery; tensile test |
| Abstract |
The small punch creep (SPC) test has recently received much attention as a new alternative to the conventional uniaxial creep test because it needs only a miniature-sized specimen directly detached from an operating system or component without any serious sampling damages. However, it is difficult to obtain the equivalent uniaxial creep data directly from the SPC data. As a specimen is deformed by a punch in the SPC test, the test result is sensitive to the friction between them. Finite element analyses with various friction coefficients was performed and showed a tendency of increased SPC life with an increased friction coefficient. The necking position predicted by the SPC simulation with a proper friction coefficient showed good agreement with that observed from the real SPC test. Finally, a noble method to convert the SPC load and displacement rate into the equivalent uniaxial creep stress and strain rate, respectively, was established in this study. |