Investigation of Contact Conductance Across an Explosive Welded Bimetallic Joint

ABSTRACT

Bimetallic interfaces are used in transition joints between two different metals not compatible for welding. Such joints find application in many space transport systems involving heat application in many space transport systems involving heat transfer. Heat transfer through bimetallic interface is complex and the contact conductance at the joint can neither be modeled nor be predicted accurately. The contact conductance of such joints can only be characterised by experimental measurements. In this paper the contact conductance across a bimetallic joint between stainless steel and aluminum alloy is evaluated. Specimens of bimetallic joints were made and tested in an axial heat flow apparatus. Tests were conducted over a temperature range from –125°C to 350°C. The effects of thermal rectification and hysteresis on contact conductance were also established over the entire range of temperature.

---

Full Text (PDF)

© 2010 Research Publishing Services