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10-25 Recap

10-25 Recap. Matthew Humbert. Fractology. ASM Handbooks 11 – Failure Analysis and Prevention 12 – Fractogrophy 19 – Fatigue and Fracture. Material Limits. 4 th Gen Turbine Blades. Operating at 1590 ºC Reducing and Oxidizing Environment PtAl TBC Convective cooling.

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10-25 Recap

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  1. 10-25 Recap Matthew Humbert

  2. Fractology • ASM Handbooks • 11 – Failure Analysis and Prevention • 12 –Fractogrophy • 19 – Fatigue and Fracture

  3. Material Limits

  4. 4th Gen Turbine Blades • Operating at 1590 ºC • Reducing and Oxidizing Environment • PtAl TBC • Convective cooling J Gurrappa, I Gurrappa, I. Platinum Aluminide Coatings for Oxidation Resistance of Titanium Alloys PLATINUM METALS REVIEW

  5. Bulk HT Processing • Skull melting • Plasma processing • Sintering • Melting • Reactive Flame Spraying • Reactive Sintering • Everything reacts with everything • Anything is possible

  6. Environmental Damage • Hydrogen embrittlement • Stainless steel sensitization • Blue embrittlement –Temper embrittlement – 425C • Hot-shorting • Liquid metal embrittlement • Nitrogen, oxygen, and carbon embrittlement in specific materials

  7. Baffle Bolt

  8. Ductile to Brittle Transition 1018 mild steel

  9. Giga-tonnes of Nano-Structure • To make big things we need to weld • Progress with BMG’s • Welding – Melting and solidifying • Control microstructure during solidification • Keep enthalpy high while making entropy small • Complex alloys with many components. Y. Kawamura, Liquid phase and supercooled liquid phase welding of bulk metallic glasses, Materials Science and Engineering: A, Volumes 375–377, 15 July 2004, Pages 112-119

  10. Questions

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