Measurement of the transformation temperature of shape memory alloys
When a substance undergoes a phase transition due to a temperature change, a change in thermal energy occurs.
Shape memory alloys are alloys that have the property of returning to their original shape when heated above a specific temperature, even after being deformed. The manifestation of shape memory is due to a phase transformation (martensitic transformation). By capturing the thermal energy changes during the transformation using Differential Scanning Calorimetry (DSC), we measured the transformation temperatures of three types of shape memory alloy products and investigated their relationship with composition through elemental analysis. When a deformed wire is immersed in hot water, it instantly returns to its original shape. 【Transformation Temperature Measurement by DSC】 - Investigated the transformation temperatures of three types of shape memory alloys using DSC. - It was found that the transformation temperatures are in the order of A > B > C. - Shape memory alloy C is believed to be in a superelastic state at room temperature. - Af: A 45.91, B 41.20, C 11.83 - Ms: A 43.75, B 36.25, C -15.59 *For more details, please refer to the PDF document or feel free to contact us.
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**Composition Analysis by Elemental Analysis** - Elemental analysis revealed that for shape memory alloy C, which has a transformation temperature below freezing, the Ti/Ni ratio differs from that of A and B. - On the other hand, no significant differences in the Ti/Ni ratio were observed between shape memory alloys A and B. - It is known that in nickel-titanium shape memory alloys, the Ti/Ni ratio affects the transformation temperature, with a higher nickel content leading to a lower transformation temperature. - The difference in transformation temperatures between A and B may be attributed to differences in crystal states due to processing during manufacturing. - DSC can capture the heat energy exchange associated with phase transformations, as seen in shape memory alloys. - Ni: A 49.2, B 49.5, C 55.5 - Ti: A 50.8, B 50.5, C 44.5 *For more details, please refer to the PDF document or feel free to contact us.*
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For more details, please refer to the PDF document or feel free to contact us.
