PPT Slide

TOUGHNESS/ STRENGTH OF DRA

Notes:

• While the yield strength of these materials depends significantly on the microstructures, the data selected for comparison are reasonable from application point of view.

• Wrought 2219 Al alloy [1]

• P/M DRA 20%SiCp/2009 Al. Considerable scatter in the data exists depending on the matrix microstructure, particle size, volume fraction etc [2].

• High temperature P/M Al-8.5Fe-1.3V-1.7Si alloy (AlliedSignal Inc.) [3].

• Ti-6Al-4V data [4]

• P/M Al-62wt.%Be (Brush Wellman Materials) [5]

• PM DRTi 10 vol.% TiCp/Ti-6Al-4V [6]

• Solid lines in DRA and Gr/PI indicate full life (~3000 hrs) of these materials up to those tempeartures, dashed lines indicate significant fall-off of properties with time.

• Significant mass loss in Gr/PI leads to property loss above 200°C.

• Target properties of DRA+ can be achieved by introducing more coherent and stable precipitates, and also by more uniform distribution of reinforcements.