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Wow, does that bring back memories. I've broken hundreds of those little hourglass-shaped test coupons in various kinds of material property tests.
I heard the Phds talking about the promise of growing single crystal turbine blades, but it hadn't been done yet. Much of the focus was on casting near-net blades to cut down on machining. The idea of casting net shape, single-crystal blades was science fiction. Until watching this, I didn't understand why single-crystal was important. But heck, I was just a lowly test engineer (You make em'. We break em'). Most of the work I did was on titanium compressor blade material and aluminum structural materials.
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