Transient liquid phase bonding of dissimilar nickel base superalloys — wettability, microstructure and mechanical properties

2008 ◽  
Vol 24 (5) ◽  
pp. 517-528 ◽  
Author(s):  
R. Aluru ◽  
W. F. Gale ◽  
S. V. Chitti ◽  
N. Sofyan ◽  
R. D. Love ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Liquid Phase ◽  
Transient Liquid Phase ◽  
Transient Liquid Phase Bonding ◽  
Microstructure And Mechanical Properties ◽  
Nickel Base Superalloys ◽  
Nickel Base

scholarly journals Transient Liquid Phase Bonding of Pairings of Parent Superalloy Material with Different Composition and Grain Structure

2011 ◽  
Vol 278 ◽  
pp. 454-459 ◽  
Author(s):  
Susanne Steuer ◽  
Sebastian Piegert ◽  
M. Frommherz ◽  
Robert F. Singer ◽  
Alfred Scholz
Keyword(s):  
Liquid Phase ◽  
Elevated Temperatures ◽  
Turbine Blades ◽  
Transient Liquid Phase ◽  
Grain Structure ◽  
Transient Liquid Phase Bonding ◽  
Nickel Base Superalloys ◽  
High Temperature Components ◽  
Nickel Base ◽  
Term Creep

Joining of different nickel-base superalloys could simplify the manufacturing of turbine blades. The used technique of choice is transient liquid phase bonding, which is an established repair technology for high temperature components. Two nickel-base superalloys with distinct composition and grain structure are bonded and the joints are analysed regarding the microstructure. To quantify the mechanical properties of these joints, tensile and short term creep rupture tests were performed at room and elevated temperatures.

Transient-Liquid-Phase Bonding of H230 Ni-Based Alloy Using Ni-P Interlayer: Microstructure and Mechanical Properties

2017 ◽  
Vol 48 (7) ◽  
pp. 3343-3356 ◽  
Author(s):  
Monica Kapoor ◽  
Ömer N. Doğan ◽  
Casey S. Carney ◽  
Rajesh V. Saranam ◽  
Patrick McNeff ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Liquid Phase ◽  
Transient Liquid Phase ◽  
Transient Liquid Phase Bonding ◽  
Microstructure And Mechanical Properties

Diffusion Brazing of Single Crystalline Nickel Base Superalloys Using Boron Free Nickel Base Braze Alloys

2008 ◽  
Vol 273-276 ◽  
pp. 294-299 ◽  
Author(s):  
Paul Heinz ◽  
Andreas Volek ◽  
Robert F. Singer ◽  
Markus Dinkel ◽  
Florian Pyczak ◽  
...  
Keyword(s):  
Melting Point ◽  
Liquid Phase ◽  
Gas Turbines ◽  
Transient Liquid Phase ◽  
Base Material ◽  
Transient Liquid Phase Bonding ◽  
Single Crystalline ◽  
Nickel Base Superalloys ◽  
Nickel Base ◽  
Diffusion Behaviour

Brazing is a well established repair technique for high temperature components in both industrial gas turbines and aero engines. Conventional nickel base braze alloys contain boron or silicon as melting point depressing elements. The major benefit of boron and silicon compared to other melting point depressants is its large effect on the melting point and its high diffusion coefficient in nickel base superalloys. However these elements promote precipitation of undesired brittle phases during the brazing process. To avoid these phases, transient liquid phase bonding in combination with boron and silicon free brazing alloys will be examined in this work. The influence of the brazing temperature on solidification and diffusion behaviour during transient liquid phase bonding for a single crystalline first generation and a second generation superalloy will be reported. Our experiments show that isothermal solidification without precipitation of brittle phases in the braze joint or the base material can be achieved. The brazed joint consists of fine γ/γ´ microstructure. EBSD measurements demonstrated that the single crystalline orientation of the base material was maintained throughout the joint. Electron probe micro analysis is used to characterize the diffusion behaviour. Solidification velocity will be compared with the theory of transient liquid phase bonding established by Tuah-Poku [1].

scholarly journals Microstructure and mechanical properties of Cu/Sn-In/Cu joints obtained by ultrasonic-assisted transient liquid phase bonding in air

2020 ◽  
Vol 12 (10) ◽  
pp. 168781402096653
Author(s):  
Yan Bi ◽  
Yong Nie ◽  
Qian Wang ◽  
Jian Han ◽  
Yangchuan Cai
Keyword(s):  
Mechanical Properties ◽  
Liquid Phase ◽  
Ultrasonic Vibration ◽  
Weld Seam ◽  
Transient Liquid Phase ◽  
Coarse Grained ◽  
Transient Liquid Phase Bonding ◽  
Microstructure And Mechanical Properties ◽  
Ultrasonic Assisted ◽  
Pure Cu

Ultrasonic-assisted transient liquid phase bonding of pure Cu with Sn-In solder was realized at 140°C in air. Shear test was carried out on the weldment. The effect of ultrasonic vibration on microstructure and mechanical properties of the weld seam was studied. The relationship between the formation of intermetallic compounds and their mechanical properties was analyzed by means of electronic scanning and element analysis. (Sn) solid solution, ε(Cu3Sn), η(Cu6Sn5), Cu10Sn3, Cu11In9, Cu9In4, γ, β phase were detected in the weld seam. When the ultrasonic vibration time is 30 s, the shear strength reached a maximum of 22.76 MPa. The fracture occurred on the surface of the fine-grained η(Cu6Sn5) phase. The fracture surface was partially covered with coarse-grained Cu11In9 phase, which belonged to a brittle fracture.

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