Thank you for sharing! I do find this very interesting, as well.
I've read from other studies showing the potential of improving the recoverable strain by rolling a NiTi rod to an highly strain, amorphous state. The nanocomposite study using nanocrystalline NiTi to roll followed by a mild heat treatment seems to amplify the effects of improving the thermomechanical properties. I wonder if collecting
in situ data (ND or TEM) during the recrystallization process would deem helpful to use for modeling or for a greater understanding of processing parameters.
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Faith Gantz
University of North Texas
Denton TX
(208) 518-8336
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Original Message:
Sent: 06-25-2021 12:41
From: Ashley Bucsek
Subject: Nanocomposite NiTi SMA with high strength and fatigue resistance
A month or two late, but really interesting work by Qingping Sun and coauthors published in Nature Nanotechnology this spring (Nanocomposite NiTi shape memory alloy with high strength and fatigue resistance)! I'd be very excited to hear more about this, like how it was made, the challenges involved, and the macroscale sample testing.
| Nature Nanotechnology | remove preview |
| | Nanocomposite NiTi shape memory alloy with high strength and fatigue resistance | | Increasing the fatigue life of shape memory alloys often compromises other mechanical properties such as yield strength and plastic deformation behaviour. Introducing a mixed nanostructure of crystalline and amorphous phases can enable superelasticity in NiTi micropillars with recoverable strain of 4.3%, yield strength of 2.3 GPa and 108 reversible-phase transition cycles under a stress of 1.8 GPa. | | View this on Nature Nanotechnology > |
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Ashley Bucsek
Assistant Professor
University of Michigan
Ann Arbor MI
7326758291
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