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- 변형지도 모델링을 통한 몰리브데늄의 고온 변형에 따른 미세조직 변화 연구
- 김영무, 이성호, 이성, 노준웅
- Microstructural Evolution during Hot Deformation of Molybdenum using Processing Map Approach
- Young-Moo Kim, Sung-Ho Lee, Seong Lee, Joon-Woong Noh
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Journal of Korean Powder Metallurgy Institute 2008;15(6):458-465
DOI: https://doi.org/10.4150/KPMI.2008.15.6.458
1국방과학연구소 제4기술연구본부 국방소재기술부
2국방과학연구소 제4기술연구본부 국방소재기술부
3국방과학연구소 제4기술연구본부 국방소재기술부
4국방과학연구소 제4기술연구본부 국방소재기술부
1Defense Material and Evaluation Technology Directorate, The 4th Research and Development Institute, Agency for Defense Development
2Defense Material and Evaluation Technology Directorate, The 4th Research and Development Institute, Agency for Defense Development
3Defense Material and Evaluation Technology Directorate, The 4th Research and Development Institute, Agency for Defense Development
4Defense Material and Evaluation Technology Directorate, The 4th Research and Development Institute, Agency for Defense Development
2국방과학연구소 제4기술연구본부 국방소재기술부
3국방과학연구소 제4기술연구본부 국방소재기술부
4국방과학연구소 제4기술연구본부 국방소재기술부
1Defense Material and Evaluation Technology Directorate, The 4th Research and Development Institute, Agency for Defense Development
2Defense Material and Evaluation Technology Directorate, The 4th Research and Development Institute, Agency for Defense Development
3Defense Material and Evaluation Technology Directorate, The 4th Research and Development Institute, Agency for Defense Development
4Defense Material and Evaluation Technology Directorate, The 4th Research and Development Institute, Agency for Defense Development
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Abstract
The hot deformation characteristics of pure molybdenum was investigated in the temperature range of 600sim1200°C and strain rate range of 0.01sim10.0/s using a Gleeble test machine. The power dissipation map for hot working was developed on the basis of the Dynamic Materials Model. According to the map, dynamic recrystallization (DRX) occurs in the temperature range of 1000sim1100°C and the strain rate range of 0.01sim10.0/s, which are the optimum conditions for hot working of this material. The average grain size after DRX is 5µm. The material undergoes flow instabilities at temperatures of 900sim1200°C and the strain rates of 0.01sim10.0/s, as calculated by the continuum instability criterion.
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