Material Analysis of Austempered Ductile Iron

摘要

A materials analysis was performed on a sample of austempered ductile iron (ADI).This material was supplied in the heat-treated condition by a commercial producer. ADI is being examined as a potential alternate material to be used in the manufacture of muzzle brakes and other candidate weapon components. The analysis included mechanical property determination, chemical composition determination, metallographic examination, and scanning electron microscopy. The mechanical properties obtained were compared to the requirements specified on the 155-mm M284 muzzle brake drawing and the military casting specification MIL-B-12253. Based on the analysis, the ADI material examined would not be suitable as an alternate material for the muzzle brake. Furthermore, the results of the evaluation suggest that the material may not have been property heat treated for this particular application.