기계적 밀링 처리하여 SPS법으로 제작한 티타늄의 미세조직과 강화기구 특성
(주)코리아스칼라
- 최초 등록일
- 2023.08.14
- 최종 저작일
- 2023.06
- 9페이지/ 어도비 PDF
- 가격 4,000원
* 본 문서는 배포용으로 복사 및 편집이 불가합니다.
서지정보
ㆍ발행기관 : 한국재료학회
ㆍ수록지정보 : 한국재료학회지 / 33권 / 6호
ㆍ저자명 : 한창석, 김준성, 심우빈
목차
1. 서 론
2. 실험방법
2.1. 시험편 제작
2.2. 재료특성 평가
3. 결 과
3.1. MM분말의 특성
3.2. SPS 소결체의 특성
4. 고 찰
4.1. MM분말형상과 경도와의 관계
4.2. 결정격자와 반가폭과의 관계
4.3. SPS 소결체의 강화기구
5. 결 론
Acknowledgement
영어 초록
Titanium, which has excellent strength and toughness characteristics, is increasingly used in the aerospace field. Among the titanium alloys used for body parts, more than 80 % are Ti-6Al-4V alloys with a tensile strength of 931 MPa. The spark plasma sintering (SPS) method is used for solidification molding of powder manufactured by the mechanical milling (MM) method, by sintering at low temperature for a short time. This sintering method avoids coarsening of the fine crystal grains or dispersed particles of the MM powder. To improve the mechanical properties of pure titanium without adding alloying elements, stearic acid was added to pure titanium powder as a process control agent (PCA), and MM treatment was performed. The properties of the MM powder and SPS material produced by solidifying the powder were investigated by hardness measurement, X-ray diffraction, density measurement and structure observation. The processing deformation of the pure titanium powder depends on the amount of stearic acid added and the MM treatment time. TiN was also generated in powder treated by MM 8 h with 0.50 g of added stearic acid, and the hardness of the powder was higher than that of Ti-6Al-4V alloy when treated with MM for 8 h. When the MM-treated powder was solidified in the SPS equipment, TiC was formed by the solid phase reaction. The SPS material prepared as a powder treated with MM 8 h by adding 0.50 g of stearic acid also formed TiN and exhibited the highest hardness of Hv1253.
참고 자료
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