Clad Protection of Thin Sheet Super Alloy Materials

The need for protecting thin gage Rene 41 from oxidation when heated above approximately 1550 F for extended periods is discussed. An evaluation of cladding as a means of protection is presented. It was found that oxidation protection for times up to 100 hr at 1800 F, or 10 hr at 2000 F, can be provided with cladding thickness of 0.001 in. However, interalloy diffusion and alloy depletion from the Rene 41 were problems with each of the potential clad alloys investigated.