Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1499994 | Scripta Materialia | 2011 | 4 Pages |
Abstract
A slightly Ni-rich NiTi–20Hf (at.%) alloy was aged for 3 h at 550 °C to form a homogeneous distribution of 10–20 nm precipitates. To determine the effect of such structures on the martensite–austenite transformation, preliminary load-biased shape-memory and superelastic properties were measured. The alloy exhibited reasonably high transformation temperatures, near-perfect dimensional stability and a work output as high as 18.7 J cm−3 during load-biased thermal cycling. Isothermal stress cycling of the austenite between 180 and 220 °C resulted in near-perfect superelastic behavior up to 3% applied strain.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
G.S. Bigelow, A. Garg, S.A. Padula II, D.J. Gaydosh, R.D. Noebe,