Joining Dissimilar Materials

Request Number N076226
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IncWell's partner seeks novel methods for joining dissimilar materials.



Automotive car doors are often made by hemming sheets of dissimilar metals together. When the door is heated to bake the paint, the metals undergo thermal expansion which can break the seal, allowing water penetration that leads to corrosion. Materials used for the inner panel can be steel, aluminum, magnesium, or FRP. Materials used for the outer door panel can be steel or aluminum. Seams between dissimilar metals must be able to withstand thermal expansion during the paint baking process.


Potential joint types include:






















Current joining technologies can suffer from a lack of sufficient joint strength. Additionally, manufacturing with joint holes in place and locating the holes within tolerances can be challenging.


IncWell's partner seeks new, cost-effective joining methods applicable to both single-side and double-side access (see image below).
















Key Success Criteria

Suitable solutions will meet the following technical criteria:

  • Create a smooth edge
  • Allow for dissimilar metal combinations
  • Withstand paint baking process for an Automotive Class A finish on one side
  • traditional lap conditions are the primary joint of interest

As well as the following business criteria:

  • Cost comparable to using rivets and adhesives
  • Meet OEM specifications for an automotive door
  • Rank at TRL 2 or above


Possible Approaches

IncWell's partner is open to all approaches capable of achieving the performance goals stated above.


Approaches not of interest



Preferred Collaboration types
  • Joint Development
  • Contract Research
  • Consulting
  • Supply Agreement
Items to be submitted

When responding to this request, please be sure to provide a non-confidential description of the joining technology you propose along with information regarding your alignment with the Key Success Criteria as well as your desired business relationship with IncWell's partner.


Point of Contact
Jonathan Jakischa
Area of Interest
  • Manufacturing & Fabrication
  • Bonding & Joining
  • Original Equipment Manufacturers
  • Transportation
  • Automotive
Due Date
January 15, 2018
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