kpmi
Articles
- Page Path
- HOME > J Korean Powder Metall Inst > Volume 18(5); 2011 > Article
- 수분사법으로 제조된 순철 분말의 고압비틀림 성형 공정에 의한 치밀화 및 나노결정화
- 윤은유, 이동준, 김하늘, 강희수, 이언식, 김형섭
- Densification and Nanocrystallization of Water-Atomized Pure Iron Powder Using High Pressure Torsion
- Eun-Yoo Yoon, Dong-Jun Lee, Ha-Neul Kim, Hee-Soo Kang, Eon-Sik Lee, Hyoung-Seop Kim
-
Journal of Korean Powder Metallurgy Institute 2011;18(5):411-416
DOI: https://doi.org/10.4150/KPMI.2011.18.5.411
1포항공과대학교 신소재공학과
2포항공과대학교 신소재공학과
3포항산업과학연구원 신금속연구본부
4포항산업과학연구원 신금속연구본부
5포항산업과학연구원 신금속연구본부
6포항공과대학교 신소재공학과
1Department of Materials Science and Engineering, POSTECH(Pohang University of Science and Technology)
2Department of Materials Science and Engineering, POSTECH(Pohang University of Science and Technology)
3New Materials Research Department, RIST
4New Materials Research Department, RIST
5New Materials Research Department, RIST
6Department of Materials Science and Engineering, POSTECH(Pohang University of Science and Technology)
2포항공과대학교 신소재공학과
3포항산업과학연구원 신금속연구본부
4포항산업과학연구원 신금속연구본부
5포항산업과학연구원 신금속연구본부
6포항공과대학교 신소재공학과
1Department of Materials Science and Engineering, POSTECH(Pohang University of Science and Technology)
2Department of Materials Science and Engineering, POSTECH(Pohang University of Science and Technology)
3New Materials Research Department, RIST
4New Materials Research Department, RIST
5New Materials Research Department, RIST
6Department of Materials Science and Engineering, POSTECH(Pohang University of Science and Technology)
- 98 Views
- 0 Download
- 5 Crossref
- 0 Scopus
Abstract
In this study, powder metallurgy and severe plastic deformation by high-pressure torsion (HPT) approaches were combined to achieve both full density and grain refinement at the same time. Water-atomized pure iron powders were consolidated to disc-shaped samples at room temperature using HPT of 10 GPa up to 3 turns. The resulting microstructural size decreases with increasing strain and reaches a steady-state with nanocrystalline (down to ~250 nm in average grain size) structure. The water-atomized iron powders were deformed plastically as well as fully densified, as high as 99% of relative density by high pressure, resulting in effective grain size refinements and enhanced microhardness values.
Cited- Related articles
-
TOP
