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Research Partnerships & Innovation

Building Repair Welding Capability for MRO Services – CARIC DPHM 711

May 14, 2019

The Opportunity

Selected figures from the DPHM 711 project

At TRL levels 4-6, the CARIC DPHM 711 was a multi-party, 2.5 year-long, $1.4M project. The objective was to determine the suitability of select advanced welding technologies for the repair of Al and Mg alloys for applications in the repair of fan frames, fan cases, and gearbox housing.

Comprehensive research including process development and optimization, metallurgical analysis, and standardized testing efforts was conducted to address the welding challenges leading to quality problems in selected aerospace Al and Mg alloys.

The Approach

CMT and Laser equipment set up and training of key technical staff, initial experimentation to establish process parameter, design of experiment (DOE) and statistical analysis, process optimization, metallurgical, mechanical and corrosion evaluation, and simulated weld repair demonstrations were performed on scrap gearbox housing and engine case.

The Outcomes

Following a comprehensive study, DOE, process optimization, iterative experimentation, quality evaluations, microstructure analysis, mechanical tests, and corrosion studies, simulated weld repair demonstrations were performed on scrap gearbox housing and engine case. 

The Benefits

  • Generation of new innovative processes
  • Improvement in competitiveness and unique MRO services
  • Expanding the frontiers of knowledge in advanced welding


Cold Metal Transfer (CMT) welding in operation

“The DPHM 711 project was StandardAero’s first foray into a CARIC research project. We had a very successful partnership with Red River College and the other project collaborators. The project results will be used for both research reference and strategic repair development planning – allowing us to position ourselves as a market leader in MRO activities.”

— Andrew Harvey C.E.T., Manager, Repair Development Engineering, StandardAero Component Services – Canada