Nitinol transformation temperature refers to the temperature at which it transforms between its initial and deformed shapes. When it is heated to its transformation temperature, its original shape will begin to recover. This transformation embodies the memory effect, one of the main characteristics of memory alloy, because it allows the alloy to deform itself under the application of force. When it is cooled, it will remain in its deformed shape until it is thermally stimulated again to trigger the transformation.
Shape memory alloy is a smart memory alloy composed of nickel and titanium. It is often used to make some smart parts because of its memory and superelasticity, which means that when nitinol memory alloy is subjected to thermodynamic or electrical stimulation, it will automatically change shape and return to its original shape after the stimulation is removed, so that it can return to its "memory". This self-memory phenomenon is caused by the changes in its physical and chemical properties at different temperatures. The most important point in the process of realizing this self-memory phenomenon is what we call transformation temperature.
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Nitinol Standard ASTM F2063 AF
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Name
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Grade
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Transformation Temperature |
Form
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Standard
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Shape Memory Nitinol Alloy
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Ti-Ni-01
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20 °C~ 40 °C
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Wire,Rod, plate, Tube, Spring |
Customer specified or
Industry standard |
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Ti-Ni-02
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45 °C~ 90 °C
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Superelastic Nitinol Alloy
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TiNi-SS
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-5 °C~ 5 °C
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Low Temperature Superelastic Nitinol Alloy
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TN3
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-5°C~ -15°C
-20°C~ -30°C |
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TNC
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Medical Nitinol Alloy
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TiNi-SS
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33 ± 3 °C
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ASTM F2063
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Narrow Hysteresis Nitinol Alloy
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Ti-Ni-Cu
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As-Ms ≤ 5 °C
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Wire, bar |
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Wide Hysteresis Nitinol Alloy
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Ti-Ni-Fe
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As-Ms ≤ 150 °C
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Austenite finish temperature is one of the key factors of Nitinol memory effect. The speed and magnitude of deformation of shape memory alloy are related to its transformation temperature. The realization process of Nitinol memory effect is a moment, so we must control its transformation temperature when processing memory parts. Only by grasping its austenite temperature can the shape memory effect be perfectly realized regardless of whether the part is high temperature or low temperature. Therefore, studying the transformation temperature can help us better understand and control the behavior of Nitinol at different temperatures.
Using the memory effect of Nitinol, we can also make one-way memory and two-way memory products, such as nitinol shape memory springs widely used in various fields. Researchers in various fields have discovered many useful applications, such as medical devices, robotics and aerospace, jewelry industry and outdoor sports. In the medical industry, various superelastic nitinol vascular stents are widely used to reduce the size of surgical incisions in the body and maintain accurate position and biocompatibility with the human body.
In general, Nitinol transformation temperature is a concept that is worth our in-depth study. Exploring the thermodynamic properties of memory alloys will help develop more efficient and innovative applications. If you want to know more about nitinol, please feel free to contact amybai2010@zwmet.com and 0086-18161909780 (WhatsApp).
