| DOI | Resolve DOI: https://doi.org/10.1115/GT2009-59079 |
|---|
| Author | Search for: Mcguire, Daniel; Search for: Huang, Xiao; Search for: Nagy, Doug; Search for: Chen, Weijie1 |
|---|
| Affiliation | - National Research Council of Canada. NRC Institute for Aerospace Research
|
|---|
| Format | Text, Article |
|---|
| Conference | ASME Turbo Expo 2009: Power for Land, Sea, and Air, June 8–12, 2009, Orlando, Florida, USA |
|---|
| Abstract | Wide gap brazing (WGB) is a cost effective and reliable means to repair gas turbine hot section components with defect sizes exceeding 0.3 mm. However, it has been shown that WGB joints of nickel-based superalloys suffer from reduced ductility and thermal fatigue life due to the presence of brittle intermetallics and porosities in the brazed joint. In order to disperse the brittle intermetallic compounds, potentially increase the ductility of the repaired region, and reduce the risk of the thermo-mechanical fatigue failure, elemental tungsten (W) was added to the braze additive filler alloy IN738 by mechanical alloying. The alloyed IN738 was then brazed with the addition of 30, 50 and 80 wt% of braze alloy (BNi-9). After brazing at 1200°C for 20 minutes, microstructural analysis of WGB joints showed a decreasing trend of discrete boride size and the amount of eutectic and script-shaped borides with the increases of W. The increase in the braze alloy to additive filler alloy ratio diminished the effect of W addition due the dissolution of W particulates. |
|---|
| Publication date | 2009 |
|---|
| Publisher | ASME |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| NPARC number | 23004770 |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 9683ef40-633b-42b5-8a7c-0417abb28e9a |
|---|
| Record created | 2018-12-18 |
|---|
| Record modified | 2020-04-16 |
|---|
