| 학회 | 한국재료학회 |
| 학술대회 | 2006년 봄 (05/19 ~ 05/20, 경상대학교 ) |
| 권호 | 12권 1호 |
| 발표분야 | 구조재료 |
| 제목 | A Nanoindentation Study on the Correlation between Strength and Microstructures in Advanced High Cr Steel |
| 초록 | Nanoindentation experiments were performed on an advanced high Cr steel having extremely fine and complex martensitic microstructures, in order to analyze the strengthening mechanism of the steel and its change with aging. At a low load level (such as 0.5 ~ 1 mN), it was possible to evaluate the matrix strength (assumed by calculating plastic zone size) alone without the contribution of high angle boundary effects. Comparing the sizes of microstructures with the predicted size of indentation plastic zone leads to suggest that the most effective microstructural unit on strengthening mechanism in this steel is indeed block rather than lath and prior austenite grain. Also, the relative values of nanohardness and macrohardness of aged samples are discussed in terms of providing a way to explain a possible mechanism for aging-induced softening phenomena in this steel. * 본 연구의 일부는 한양대학교 특성화소재사업단의 Capstone Design 프로그램 지원으로 수행되었습니다. |
| 저자 | 유병길1, 박재성1, 이연학1, S. Shim2, S. Komazaki3, 장재일4 |
| 소속 | 1한양대, 2ORNL / Univ. Tenn., 3USA, 4Muroran Inst. Tech. |
| 키워드 | Nanoindentation; High Cr steel; Martensite structure |
