Microstructural Evolution of Infrared Brazed CP-Ti Using Ti-Cu-Ni Brazes

材料科学技术（英文）, 2011, 27(2): 131-138.

^1, , ^2, , ^3, , ^4,

1.Department of Mechanical Engineering, National Hualien Industrial Vocational Senior High School, Hualien 970,Taiwan, China

2.Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan, China

3.Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan, China

4.Engineered Materials Solutions, 39 Perry Avenue, MS4-1, Attleboro, MA 02703-2410, USA

基金项目: the National Science Council (NSC),Taiwan,China(NSC 99-2221-E-002-051)

Microstructural Evolution of Infrared Brazed CP-Ti Using Ti-Cu-Ni Brazes

C.T.Chang ^1, , T.Y.Yeh ^2, , R.K.Shiue ^3, , C.S.Chang ^4,

1.Department of Mechanical Engineering, National Hualien Industrial Vocational Senior High School, Hualien 970,Taiwan, China

2.Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan, China

3.Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan, China

4.Engineered Materials Solutions, 39 Perry Avenue, MS4-1, Attleboro, MA 02703-2410, USA

Keywords： Infrared Brazing

Microstructural evolution of infrared vacuum brazed CP-Ti using two Ti-based braze alloys, Ti-15Cu-15Ni and Ti-15Cu-25Ni, has been investigated.The infrared brazed joint consisted of eutectic Ti2Cu/Ti2Ni intermetallic compounds and Ti-rich matrix.The eutectic Ti2Cu/Ti2Ni intermetallic compounds disappeared from the joint after being annealed at 900℃ for 1 h.In contrast, the depletion rate of both Cu and Ni from the braze alloy into CP-Ti substrate at 750℃ annealing was greatly decreased as compared with that annealed at 900℃.Blocky Ti2Cu/Ti2Ni phases were observed even if the specimen was annealed at 750℃ for 15 h.Because the Ni content of the Ti-15Cu-25Ni braze alloy is much higher than that of the Ti-15Cu-15Ni alloy, the amount of eutectic Ti2Cu/Ti2Ni phases in Ti-15Cu-25Ni brazed joint is more than that in Ti-15Ci-15Ni brazed joint.However, similar microstructural evolution can be obtained from the infrared brazed joint annealed at various temperatures and/or time for both filler metals.

参考文献

[1]	H.W. Chuang;D.W. Liaw;Y.C. Du .Brazing of Mo and Nb using two active braze alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):350-361.
[2]	C. S. CHANG;B. JHA .Application of Roll Welding to Brazing[J].Welding Journal,2003(10):28-31.

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Microstructural Evolution of Infrared Brazed CP-Ti Using Ti-Cu-Ni Brazes

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