Slide 8 of 16

Notes:

• While toughness depends on the microstructure, processing condition etc., the data selected here are reasonable for acceptable strength levels .

• Wrought aluminum alloy 2618 Al [2]

• Al-62%Be alloy by P/M (Brush Wellman Materials) [5,15]

• Al-8.5Fe-1.3V-1.7Si by P/M (Allied-Signal Inc.) [16]

• P/M DRA 20%SiCp/2009 Al [2]

• Cast DRA DuralTM 15% Al2O3/6061 Al [71]

• High is P/M DRA [2] and low is cast DRA [11]

• Ti-6Al-4V by cast and wrought [4]

• P/M DRTi 20%TiCp/Ti-6Al-4V (Dynamet Inc.) [18]

• DRA+ and DRTi+ represent the target toughness values for a 5 year program.