Ni-free super elastic Ti-based shape memory alloy and products thereof
A memory alloy, super-elastic technology, applied in the field of titanium-based shape memory alloy, to achieve the effect of wide application, high corrosion resistance and low cost
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Embodiment 1
[0042] Example 1 : Ti-21.5Zr-23.5Nb-1.2Al-0.6Ce alloy
[0043] The chemical composition range of the alloy according to the present invention:
[0044] Zr: 13-26wt%;
[0045] Nb: 13-26wt%;
[0046] Al: 0.3-2.8wt%;
[0047] Ce: 0.1-1.3wt%,
[0048] Ti and unavoidable impurity elements: balance.
[0049] The inevitable impurity elements mentioned here mainly include elements such as H, O, N, and C.
specific to Embodiment 1
[0050] Specifically to embodiment 1, the alloy composition obtained after smelting is:
[0051] Table 1: Chemical composition of the Ti-21.5Zr-Nb-1.2Al-0.6Ce alloy of Example 1
[0052] the element
[0053] The alloy of Example 1 was subjected to solution treatment: (temperature 850°C, heat preservation for 30 minutes, water cooling) to make a tensile sample, and tested by a tensile testing machine at room temperature (25±2°C). Set the maximum strain at 4.2%, measure and record the stress-strain curve when it is loaded and unloaded, refer to figure 2 . Experiments prove that the alloy of Example 1 has good superelasticity.
Embodiment 2
[0054] Example 2 : Ti-21.5Zr-23.5Nb-1.5Al-0.8Ce alloy
[0055] Prepare and smelt titanium alloys according to the following Table 2. The obtained alloys are subjected to solution treatment: (temperature 850°C, heat preservation for 30 minutes, water cooling) and then made into tensile samples. Stretching test machine experiment. Set the maximum strain at 4.2%, measure and record the stress-strain curve when it is loaded and unloaded, refer to image 3 . Experiments prove that the alloy of Example 2 has good superelasticity.
[0056] Table 2: Chemical composition of the Ti-21.5Zr-23.5Nb-1.5Al-0.8Ce alloy of Example 2
[0057] the element
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