Slide 1

10-25 Recap Matthew Humbert Page 1 Slide 2 Fractology ASM Handbooks 11 Failure Analysis and Prevention 12 Fractogrophy 19 Fatigue and Fracture Page 2 Slide 3 Material Limits Page 3 Slide 4 4 th Gen Turbine Blades Operating at 1590 C Reducing and Oxidizing Environment PtAl TBC Convective cooling Page 4 J Gurrappa, I Gurrappa, I. Platinum Aluminide Coatings for Oxidation Resistance of Titanium Alloys PLATINUM METALS REVIEW Slide 5 Bulk HT Processing Skull melting Plasma processing Sintering Melting Reactive Flame Spraying Reactive Sintering Page 5 Everything reacts with everything Anything is possible Slide 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 Page 6 Slide 7 Baffle Bolt Page 7 Slide 8 Ductile to Brittle Transition Page 8 1018 mild steel Slide 9 Giga-tonnes of Nano-Structure To make big things we need to weld Progress with BMGs Welding Melting and solidifying Control microstructure during solidification Keep enthalpy high while making entropy small Complex alloys with many components. Page 9 Y. Kawamura, Liquid phase and supercooled liquid phase welding of bulk metallic glasses, Materials Science and Engineering: A, Volumes 375377, 15 July 2004, Pages 112-119 Slide 10 Questions Page 10