When a substance undergoes a phase change due to a temperature change, a change in thermal energy occurs.
Shape memory alloys are alloys that return to their original shape when heated above a specific temperature, even after being deformed. The manifestation of shape memory properties is due to phase transformation (martensitic transformation). By capturing the thermal energy changes during the transformation using DSC, we measured the transformation temperatures of three types of shape memory alloy products and investigated their relationship with composition through elemental analysis. When deformed wire is immersed in hot water, it instantly returns to its original shape. 【Transformation Temperature Measurement by DSC】 ■ Investigation of 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 considered 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 Ni content leading to a lower transformation temperature. ■ The difference in transformation temperatures between A and B may be attributed to variations in the crystalline state due to differences in 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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Aites was established in 1993, originating from the quality assurance department of the IBM Japan Yasu office. Based on the technical expertise cultivated through cutting-edge defect analysis and reliability assurance of electronic components at the IBM Japan Yasu office, we have provided various products and services that support the development and manufacturing of semiconductors, displays, organic EL, solar cells, and electronic components to customers both domestically and internationally.