Shape memory material is a special functional material integrating perception and drive, in which shape memory alloy is one of the more important materials. Shape memory alloy (SMA) is a kind of alloy with a certain initial shape. After plastic deformation and fixing into another shape at low temperature, it can return to its initial shape by heating above a certain critical temperature.
Product classification: temperature memory and elastic memory
Standard: Q / xb1516 Q / xb1520
Material: tini-01 phase change temperature: 20 ° C - 40 ° C
TiNi - 02 phase transition temperature: 45 ° C - 65 ° C
TiNi SS phase transition temperature: 5 ° C - 15 ° C
TiNi - 03 phase transition temperature: < 5 ° C
TiNi - YY phase transition temperature: 33 * C + 3 ° C
TiNiCu phase transition temperature: as - mss5 ° C
TiNiNb phase transition temperature: as - MS < 150 ° C
Physical properties of Nitinol memory: tensile strength: 850 MPa yield strength: 195 ~ 690 MPa
Elongation: 25 ~ 50%
Chemical composition of NiTi alloy: Ni: 55.4% - 56.2% CS0 07 HS0. 005 O≤0.050 N:≤0.05
Executive standard: ASTM -- 2063 -- 01 ASTM f2063-2000 shape memory alloy processed materials
So far, the developed shape memory alloys are mainly Ti Ni based, Cu based and Fe based. In these three categories, some alloy elements are added and adjusted in the matrix according to different requirements and working environment, so that a series of alloys in each category are developed and applied in all walks of life to meet different special needs.
Ti Ni shape memory alloy was first developed, with the most stable shape memory effect and relatively mature. It has been applied in aerospace industry, automobile industry, electronic industry, medicine and human life. However, due to the high price of its raw materials Ni and Ti and high processing cost, its application is limited.
Cu based shape memory alloys have developed rapidly because of their low price, wide sources of raw materials and easy processing and manufacturing. Copper based shape memory alloys are the most diverse of these three types of alloys, but there are only Cu Zn Al and Cu-A1-Ni.
Fe based shape memory alloy developed late, its cost is much lower than Ti Ni and copper alloys, and it is easy to process. It has obvious competitive advantages in application. It is considered to be a functional material with wide application prospects and has attracted extensive attention.
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