Transformation behavior in a thermomechanically cycled TiNiCu alloy |
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Authors: | Lijian Rong Dr David A Miller Dimitris C Lagoudas |
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Affiliation: | (1) the Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang, People’s Republic of China;(2) Center for Mechanics of Composite, Aerospace Engineering Department, Texas A&M University, 77843 College Station, TX |
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Abstract: | The effect of thermomechanical cycling under 150 MPa on the transformation behavior in a TiNi40Cu10 (at pct) alloy annealed at different temperatures was investigated using electrical resistivity measurements and differential
scanning calorimetry (DSC). It was found that thermomechanical cycling to failure could increase or decrease the transformation
temperature for specimens annealed below or above the recrystallization temperature, respectively, but there was no obvious
change of the transformation temperature for specimens annealed at the recrystallization temperature. The DSC and electrical-resistance
experiments show that the B2 ⇋ B19 and B19 ⇋ B19′ two-stage transformations occurred in cold-worked and thermomechanically
cycled specimens and that the electrical-resistance change due to the B2 → B19 transformation is larger than that of annealed
specimens. |
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Keywords: | |
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