Journal ArticleDOI
Void formation in wide gap brazing using prepacks of nickel base braze mixes
S. K. Tung,L. C. Lim +1 more
TLDR
In this article, various types of void formed in wide gap brazed joints of C1023 nickel base superalloy produced using prepacks of nickel base braze mixes have been investigated and systematically categorised.Abstract:
The various types of void formed in wide gap brazed joints of C1023 nickel base superalloy produced using prepacks of nickel base braze mixes have been investigated and systematically categorised. Of particular interest are interfacial and interstitial voids and unwetted pockets, which are features frequently found in joints brazed using such a technique. Examination of brazed joints produced under a wide range of conditions revealed that during heating to the brazing temperature, the braze mix partially sinters together, causing the prepack to shrink towards the centreline, leaving two channels next to the joint faying surfaces. At the same time, relatively large pockets of free space are created within the partially sintered mass of prepack. At the brazing temperature, the filler metal deposited at the gap mouth becomes molten and this molten filler is drawn into the gap preferentially through the fine capillary paths in the partially sintered mass of prepack. The relatively large pockets of fre...read more
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Journal ArticleDOI
Wide Gap Braze Repair of Gas Turbine Blades and Vanes—A Review
Xiao Huang,Warren Miglietti +1 more
Journal ArticleDOI
Solidification phenomena in nickel base brazes containing boron and silicon
TL;DR: In this article, the intermetallic compounds formed in brazes of nickel base filler metals containing chromium, boron and silicon are nickel boride, nickel silicide and chromium borides.
Journal ArticleDOI
Wide gap brazing of stainless steel to nickel-based superalloy
TL;DR: In this article, a wide gap brazing of stainless steel to nickel-based superalloy was studied and the results showed that the filler metal melts and reacts with both the solid base metal and the solid additive forming a new alloy with the desired mechanical properties.
Journal ArticleDOI
Laser Engineered Net Shape (LENS) Technology for the Repair of Ni-Base Superalloy Turbine Components
Dejian Liu,Dejian Liu,John C. Lippold,J. Li,Stan R. Rohklin,Justin Vollbrecht,Richard John Grylls +6 more
TL;DR: In this article, the capability of the laser engineered net shape (LENS) process was evaluated for the repair of casting defects and improperly machined holes in gas turbine engine components.
Journal ArticleDOI
Microstructure and tensile properties of nickel-based superalloy K417G bonded using transient liquid-phase infiltration
TL;DR: In this paper, the microstructure and tensile properties of TLI joint have been investigated and the results show that the nonuniform microstructures are obtained in the TLI joints.