At present, dozens of memory alloys have been found. The non-ferrous metal detectors were used to analyze AgCd, AuCd, CuNiAi CuAuZn, CuSn, CuZn, CuZnAI, NiAl, TiNi, FePt, MnCu and other materials. Of practical industrial value are TINi and CuZnAl-based alloys. Shape memory alloy has two characteristics of shape memory and super elasticity. In aerospace (hemispherical antenna, satellite hook) energy (heat engine, detection instrumentation, thermostat), electronic (switch), mechanical (rivets, fittings, seals), medical (kidney pumps, heart valves, spine orthopedic Bar, dental orthodontic wire) and other fields have been applied. The most important applications for non-ferrous metals and shape memory alloys are pipe joints. The most significant ones are heat engines that use two-way memory effects and energy storage devices that use superelasticity. The phase transition point control of the memory alloy, martensite stabilization, memory decay, and the connection of the memory alloy with other materials are being actively studied.

The chemical composition of the shape memory alloy can be analyzed and measured with a TP-757 non-ferrous metal detector. The instrument uses a holographic blazed grating monochromator, which has the advantages of high wavelength accuracy, good monochromaticity, and low stray light. Its main technical indicators:
1, the wavelength range: 200-800nm
2, wavelength accuracy: ± 2nm
3, wavelength repeatability: 0.5nm □ transmittance accuracy: ± 0.5% (τ) (NBS930D)
4. Transmission repeatability: 0.5% (Ï„)
5, TA conversion accuracy: ± 0.004A (at 0.5A)