- 일방향 응고된 Cu-Al-Ni 합금의 변태특성에 미치는 열처리 영향
- ㆍ 저자명
- 박윤규,장우양,Park. Y.K.,Jang. W.Y.
- ㆍ 간행물명
- 열처리공학회지
- ㆍ 권/호정보
- 2003년|16권 2호|pp.90-96 (7 pages)
- ㆍ 발행정보
- 한국열처리공학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
The effect of betatizing temperature on microstructure and transformation characteristics in a Cu-AI-Ni based pseudoelastic alloy fabricated by heated mold continuous casting by using metallography, XRD and calorimetry. The microstructure of cast rod betatized at $600^{circ}C$ revealed a ${eta}_1$ parent phase and a ${gamma}_2$ phase precipitated along the casting direction. When the cast rod was betatized at the elevated temperature above $600^{circ}C$, the ${gamma}_2$ phase is completely dissolved into the matrix so that the volume fraction of the ${gamma}_2$ phase was decreased. The parent phase was stabilized by betatizing at $600^{circ}C$. However, the ${eta}_1$ parent phase was transformed to both ${{eta}_1}^{prime}$ and ${{gamma}_1}^{prime}$ martensites with increasing betatizing temperatures above $600^{circ}C$, while $M_s$ and $A_s$ temperatures were decreased. The stress-strain curves for compression test were not same with betatizing temperature; the stress-strain curves of the specimen betatized at $600^{circ}C$ and $700^{circ}C$ were linear but those of the specimen betatized at $800^{circ}C$ and $900^{circ}C$ were not linear.