http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 최일동(I.D. Choi) (검색결과 9 건)
- 무료
- 기관 내 무료
- 유료
-
-
-
-
난류용탕 in-situ 합성법에 의해 제조된 TiB<sub>2</sub> 입자강화 Cu 기지 복합재료의 특성
김정훈,윤지훈,이길근,최일동,박용호,조경목,박익민,Kim J. H.,Yun J. H.,Lee G. G.,Choi I. D.,Park Y. H.,Cho K. M.,Park I. M. 한국재료학회 2005 한국재료학회지 Vol.15 No.12
A copper matrix composite reinforced by turbulent in-situ $TiB_2$ nanoparticle was Prepared by reactions of boron ana titanium. The microstructure, mechanical and electrical properties of the as-drawn composites were investigated. The results showed that the formed $TiB_2$ particles, which had a size of about from 50 to 200nm, exhibited a homogeneous dispersion in the copper matrix. Due to their reinforcement, the hardness and Young's modulus of $Cu-TiB_2$ composites were enhanced with increasing the cooling rate. Moreover, the electrical conductivity of the composites were improved with increasing the cooling rate.
-
-
-
자동차용강의 고속변형거동에 대한 예비변형과 소부경화의 영향
최일동,김동민,Bruce, D. M.,Matlock, D. K.,Speer, J. G.,박성호 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.4
The high speed deformation behavior of TRIP steels and HSLA steels has been investigated at strain rates ranging from 10^(-2) to 10³/sec. The effects of metallurgical factors such as prestrain (2%) and bake hardening condition (170℃, 20 min) on tensile properties at various strain rates are being evaluated. Ultimate tensile strength (UTS), total elongation, strain rate sensitivity, and absorbed energy are reported. In general, UTS increases with increasing strain rate, that is, it shows positive strain rate sensitivity. And strain rate sensitivity increases sharply over 100/sec. Strength increases with increasing the amount of prestrain. The bake hardening treatment slightly influences UTS values. The absorbed energy decreases with increasing prestrain but it is not affected by bake hardening treatment. Received February 14, 2005)
-
분말야금에 의한 Al/TiNip 형상기억 복합재료의 제조 및 특성 평가
박익민,최일동,김부섭,안득만,한창훈 대한금속재료학회(대한금속학회) 1998 대한금속·재료학회지 Vol.36 No.3
Metal matrix composites reinforced with shape memory alloys induce compressive residual stresses in the matrices and result in improved tensile properties of the composite. In the present study. Al/TiNi_p shape memory composites were fabricated by powder metallurgical method, so called Plasma Activated Sintering method (PAS). Strengthening effect due to TiNi particle reinforcement as well as compressive residual stresses in A1 matrix were investigated. Fairly good matrix/reinforcement bonding was observed in the Al/TiNi_p composites. It was found that the yield strength of the composites is increased with increasing the volume fraction of TiNi particles and the amount of prestrain applied to the composites. For example, yield strength increases from 64㎫ to 114㎫ with reinforcement of 8% TiNi_p shape memory particles to the Al matrix when 4% prestrain is applied to the composite.
-
용탄단조법에 의한 AC4A Al/TiNi 형상기억 복합재료의 제조 및 특성
조경목,최일동,조영서,김부섭,안득만,박익문 대한금속재료학회(대한금속학회) 1997 대한금속·재료학회지 Vol.35 No.10
Reinforcement of shape memory alloys within metal matrix reveals compressive residual stresses in the matrices resulting in improved tensile properties of the composites. In the present study, Al/TiNi shape memory composites were fabricated by the squeeze casting technique. Optimal fabrication conditions for squeeze casting were obtained experimentally. Fairly good microstructure and matrix/reinforcement bonding observed in the squeeze cast Al/TiMi composites. Tensile tests of the composites were carried out above Ar(austenite finish temperature) which was found from DSC analysis. The amount of prestrain to induce the compressive residual stress in Al matrix and the recovery force of the TiNi were determined from tensile curves of TiNi wire. Improved strength of the composite due to TiNi reinforcement as well as compressive residual stresses in Al matrix was identified. It was found that the total interfacial area between matrix and reinforcement which depends on the wire diameter also affected the strength enhancement.
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
