ISSN 2594-5327
71º Congresso Anual da ABM — Vol. 71, Num. 71 (2016)
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The effects of temperature and strain rate on the mechanical behavior of a superelastic NiTi wire were investigated by uniaxial tensile testing. A universal testing machine with an attached heating chamber was used for the tensile tests. Temperature influence was studied through straining of samples until rupture at a fixed strain rate and temperatures of 25, 50, 75, 100, 125, 150, 175 and 200 °C. Strain rate effects were investigated by straining samples until rupture at room temperature and strain rates of 10-2, 5 x10-3 , 10-3, 5 x 10-4 and 10-4 s-1. The effects of temperature and strain rate on NiTi mechanical behavior were discussed in terms of critical stress to induce martensite and austenite yield strength, when applicable; upper plateau stress, transformation plateau length and ultimate plateau stress. It was found that increasing test temperature and strain rate shifted the stress-strain curve upwards, albeit temperature displayed a greater influence. Plateau length increased with temperature, but no significant changes were detected as a result of different strain rates.
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NiTi, Mechanical Behavior, Strain Rate, Temperature
Temperature
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Guilherme Corrêa Soares; Santos, Leandro de Arruda; Rodrigues, Mariana Carla Mendes.
EFFECTS OF TEMPERATURE AND STRAIN RATE ON THE MECHANICAL BEHAVIOR OF A SUPERELASTIC NITI WIRE,
p. 327-335.
In: 71º Congresso Anual da ABM,
Rio de Janeiro,
2016.
ISSN: 2594-5327, DOI 10.5151/1516-392X-27599
