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High Strength Nickel-Palladium-Chromium Brazing Alloys Filler metals based on nickel-palladium replace gold-based filler metals in critical superalloy brazements
| Content Provider | Semantic Scholar |
|---|---|
| Author | Bose, D. Datta, Ambarish Rabinkin, Anatol Cristofaro, Norma. De |
| Copyright Year | 2013 |
| Abstract | Aircraft engine fabricators have traditionally used brazing processes for joining engine components. Nickeland goldbased filler metals are primarily used in these applications due to their superior performance at elevated temperatures. Historically, one gold-based alloy, designated by the American Welding Society as BAu-4, has established itself as a dependable filler metal to many fabricators. Although this filler metal is finding less use due to its precious metal content, many critical engine components, especially those made of 7 ' hardened superalloys, are still brazed with BAu-4. The 7 ' hardened superalloys (such as Inconel718*) should not be brazed at temperatures exceeding 1010°C (1850°F), to prevent possible coarsening and dissolution of strengthening phases (7 ' or 7"), as well as to inhibit grain growth during brazing operations. The brazing temperature of BAu-4 is below 1010°C (1850°F), and it provides necessary elevated temperature properties. Furthermore, the availability of BAu-4 in flexible foil forms makes it suitable for joining parts of complex shapes. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://files.aws.org/wj/supplement/WJ_1986_01_s23.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
