Abstract
In this study, we demonstrate the successful brazing and superior mechanical performance of laser brazed Inconel® 718 using a Ni-Mn-Fe-Co-Cu high entropy alloy filler metal with a nominal Ni:Cu:Co:Fe:Mn molar ratio of 1:1:1:0.25:1.75. A maximum 220 MPa shear strength is achieved. The high entropy alloy experiences the hardness increases 3–4 times after brazing. If the brazing temperature is higher than 1200 °C, the bonding strength suffers due to excessivediffusion between the base metal and the filler metal. The hardness behavior is attributed to a combination of the cocktail effect and lattice distortion induced by brazing.
| Original language | English |
|---|---|
| Pages (from-to) | 11-14 |
| Number of pages | 4 |
| Journal | Materials Letters |
| Volume | 215 |
| DOIs | |
| State | Published - Mar 15 2018 |
Funding
This project is jointly supported by Institute of Public Service, University of Tennessee through I’UCRC project of National Science Foundation and a seed grant from Oak Ridge National Laboratory. We also acknowledge John Dunlap, Maulik Patel, and the Joint Institute of Advanced Materials for use of their electron microscopy, EDX, and X-ray diffraction equipment.
Keywords
- High entropy alloy
- Laser processing
- Metals and alloys
- Nickel superalloys
- Welding