Project Code: 34730
Start date and planned duration: January 2022, 36 months
Perform experimental trials on brazing and diffusion bonding of 316L and alloy 718
Evaluate the integrity of the brazed and DB joints through non-destructive and destructive tests
Assess the microstructural evolution in the substrate as well as in the joint after the joining process (brazing & diffusion bonding)
Perform functional tests on the braze joint such as tensile, shear, fatigue and corrosion
Manufacture two different using selected L-PBF and joining parameters
Metal additive manufacturing (AM) has seen a huge growth in development and adoption in the last decade. However, several problems still persist despite the continuous development. Some of these problems are part size, single material manufacturing, and inability to clear, fully enclosed, internal geometries, among others.
Joining of AM parts offers a number of potential benefits including the possibility to manufacture larger size parts by the joining of multiple components, generation of multi material structures and the manufacture of support free, complex structures with intricate internal geometries.
The overarching goal of the project is to understand how laser powder bed fusion material can be joined using solid state joining methods. Specifically the following themes will be investigated:
- Joining through brazing with a variety of brazing fillers
- Joining through diffusion bonding with and without interlayers
Both joining methods are well established for use with conventional materials with a large amount of technical knowhow available. Additionally they allow the joining of complex geometries with minimal microstructural impact. TWI already has both the equipment and the technical background to successfully investigate and propose joining solutions for these novel materials.
- Oil & Gas
Benefits to Industry