Ni-Ti SMA wire expands and contracts between its Martensite and Austenite (phase) transformation. It is achieved by heating the SMA wire under a fixed load. Ni-Ti with its high electrical resistance, SMA wire can be heated simply by applying electric current. On and off of current, wire contracts and expands, its cycle form an actuation device.
Advantages
Easy to actuate - simply apply an electric current
→Helps to make your system small, light, simple
Lightweight but High Output
Power & Speed of actuation are controllable by the current applied
Silent and smooth actuation
* Patent:JPN3956613
Property
Alloy types
Product name
Diameter (μm)
Electric
resistance
(R.T.)
(W/m)
Min. current
to move
(R.T.)
(mA)
Time(R.T.)
Max.
actual
load
(gf(MPa))
Max.
actual
strain
%
Contraction
(sec)
Expansion
(sec)
Ni-Ti
NT-
M3-
TTR
50
400
110
0.3
0.7
60(300)
~5
100
100
300
0.6
2.5
200(250)
200
25
700
1.5
7.0
640(200)
Ni-Ti-Cu
NT-
H5-
TTR
50
550
90
0.3
0.8
70(350)
~5
100
140
240
1.0
2.5
240(300)
200
35
600
2.0
8.0
800(250)
NT-
H7-
TTR
50
550
90
0.5
1.0
80(400)
~5
100
140
200
1.0
3.0
280(350)
200
35
500
2.5
9.0
960(300)
** ** Above data are for your reference only, not a guarantee of performance. Actual electric current required for an actuation and the actual duration of an actuation vary according to the surrounding temperature and air-flow conditions of the test. Actual recoverable performance varies according to the fixed load and electric current flow of the test.
Strain – Temperature curves by constant load test
Effect of electrical current on the strain change (by constant load 200MPa at R.T. )
Transformation temperatures (Af, Mf) change with load