변형지도 모델링을 통한 구리 분말 소결체의 고온 변형에 따른 미세조직 연구
Microstructural Evolution during Hot Deformation of P/M Copper using Processing Map
장수호(경북대학교); 김영무(국방과학연구소); 박경채(경북대학교)
19권 2호, 134~139쪽
초록
P/M coppers are subjected to the isothermal compression tests at the strain rate ranging from 0.01 to 10.0 s−1and the temperature from 200 to 800°C. The processing map reveals the dynamic recrystallization (DRX) domain in the following temperature and strain rate ranges: 600-800°C and 0.01-1.0 s−1, respectively. In the domain, the region at temperature of 600°C and strain rate of 10−2 s−1 shows peak efficiency. From the kinetic analysis, the apparent activation energy in the DRX domain is 190.67 kJ/mol and it suggests that lattice self-diffusion is the rate controlling mechanism.
Abstract
P/M coppers are subjected to the isothermal compression tests at the strain rate ranging from 0.01 to 10.0 s−1and the temperature from 200 to 800°C. The processing map reveals the dynamic recrystallization (DRX) domain in the following temperature and strain rate ranges: 600-800°C and 0.01-1.0 s−1, respectively. In the domain, the region at temperature of 600°C and strain rate of 10−2 s−1 shows peak efficiency. From the kinetic analysis, the apparent activation energy in the DRX domain is 190.67 kJ/mol and it suggests that lattice self-diffusion is the rate controlling mechanism.
- 발행기관:
- 한국분말재료학회
- DOI:
- http://dx.doi.org/
- 분류:
- 금속공학