서지주요정보
Al/Ti 합금의 브레이징 기구와 계면특성 = Brazing mechanism and interface characteristics of Al/Ti brazed alloys
서명 / 저자 Al/Ti 합금의 브레이징 기구와 계면특성 = Brazing mechanism and interface characteristics of Al/Ti brazed alloys / 봉하헌 지음.
저자명 봉하헌 ; 홍순형
발행사항 [대전 : 한국과학기술원, 1999].
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소장정보

등록번호

8009342

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 99001

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

Brazing mechanism and interface characteristics of Ti/Al brazed alloys were investigated at temperature of 620℃. 1050Al and cp-Ti were used for the base metals, and 100μm thick Al-10Si-1Mg alloy foils were used for the filler metal. The adhesive shear test, X-ray diffraction analysis and microstructure observations were performed. The bonding process of Al/filler was divided into four steps. The first step was the wetting of molten filler metal on the surface of Al. The second step was the removal of oxide film on the surface of Al. The third step was the isothermal solidification of filler metal by the diffusion of Si from filler metal into base alloys. Finally, the homogenization of Si at the bonded region was occurred. The bonding process of Ti/filler consisted of the formation of intermetallics and the growing of intermetallics by the diffusion of solute atoms. The intermetallic layers were formed at Ti/filler interface and the composition of the intermetallics were identified as Al5Si12Ti7 and Al12Si3Ti5. The Si content of Al base metal was identified by WDS. The Si content in filler metal decreased due to the diffusion of Si into Al base metal and into the intermetallic layers with increasing the brazing time. The thickness of molten filler metal layer decreased with increasing bonding time by the decrease in Si content in molten filler metal. The bond strength of Al/Ti brazed joint was measured by adhesive shear test. The bond strength profile with increasing the brazing time was divided into three regimes. In regime I, the bond strength of the brazed joint increased rapidly up to 73MPa with increasing the brazing time up to 7min. In regime II, the bond strength increased slowly or nearly constant with increasing the brazing time up to 30min. In regime III, the bond strength decreased with increasing the brazing time up to 2hours. The bond strength peak of 84MPa was observed at the brazing time of 30min in regime II. The oxide film was existed and the fracture was occurred at the Al/filler interface in regime I. The oxide film was removed and the thickness of intermetallic layers was less than 10μm in regime II. The cracks were initiated near intermetallic layer and the fracture was occurred at intermetallics/Al interface in regime III.

서지기타정보

서지기타정보
청구기호 {MMS 99001
형태사항 iii, 76 p. : 삽도 ; 26 cm
언어 한국어
일반주기 지도교수: 홍순형
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌: p. 75-76
주제 브레이징
금속간화합물
산화막
확산
접합강도
접합기구
접합과정
Brazing
Al
Ti
Mechanism
Bond strength
Intermetallics
Diffusion
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