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{"title":"High Performance Titanium Alloy Plate Niti Alloy Sheet For Pacemaker High","imgUrl":"https:\/\/img.chinax.com\/nimg\/e0\/e3\/0e3ddfcabf2df6508348ea41515f-200x200-1\/high_performance_titanium_alloy_plate_niti_alloy_sheet_for_pacemaker_high.jpg","attrs":{"Brand Name":"HUONA","Model Number":"F55\/ F56","Certification":"ISO9001,RoHS","Place of Origin":"China"}}
{"title":"Lightweight Super Elastic Nickel Titanium Shape Memory Alloy Wire For Orthodonti","imgUrl":"https:\/\/img.chinax.com\/nimg\/40\/37\/463479100104daa87753b6dc02b8-200x200-1\/lightweight_super_elastic_nickel_titanium_shape_memory_alloy_wire_for_orthodontics.jpg","attrs":{"Brand Name":"HUONA","Model Number":"Nitinol","Certification":"ISO9001 SGS","Place of Origin":"Shanghai, China"}}
{"title":"Medical Nickel Titanium Alloy AMS For Orthodontic Material Support Customizable","imgUrl":"https:\/\/img.chinax.com\/nimg\/96\/3c\/b7ee3a8d904a4bfdf2d78b9852d7-200x200-1\/medical_nickel_titanium_alloy_ams_for_orthodontic_material_support_customizable.jpg","attrs":{"Brand Name":"HUONA","Model Number":"JZH5-306","Certification":"ISO9001,RoHS","Place of Origin":"China"}}
{"title":"Durable Super Elastic Nitinol Wire RoHS Corrosion Resistant For Medical Field","imgUrl":"https:\/\/img.chinax.com\/nimg\/bd\/68\/65410ef1ae251cfcb7906a238139-200x200-1\/durable_super_elastic_nitinol_wire_rohs_corrosion_resistant_for_medical_field.jpg","attrs":{"Brand Name":"HUONA","Model Number":"Nitinol Wire","Certification":"ISO9001, RoHS","Place of Origin":"China"}}
{"title":"Custom Length Nitinol Wire Spring Shape Memory For Diverse Applications","imgUrl":"https:\/\/img.chinax.com\/nimg\/5f\/96\/3343bc6e6fbf2a9a1a5bce695454-200x200-1\/custom_length_nitinol_wire_spring_shape_memory_for_diverse_applications.jpg","attrs":{"Brand Name":"HUONA","Place of Origin":"China","Payment Terms":"T\/T","Model Number":"Niti"}}
{"title":"Superelastic SMA Niti Ribbons Shape Memory Alloy Nitinol Flat Wire For Bracelet","imgUrl":"https:\/\/img.chinax.com\/nimg\/cd\/10\/ff4346a0de9a2153156e7adf457a-200x200-1\/superelastic_sma_niti_ribbons_shape_memory_alloy_nitinol_flat_wire_for_bracelet.jpg","attrs":{"Brand Name":"HUONA","Model Number":"Niti Strip","Certification":"ISO9001, RoHS","Place of Origin":"China"}}
{"title":"Elastic Shape Memory Nitinol Wire Nickel Titanium Wire For Industry","imgUrl":"https:\/\/img.chinax.com\/nimg\/40\/37\/463479100104daa87753b6dc02b8-200x200-1\/elastic_shape_memory_nitinol_wire_nickel_titanium_wire_for_industry.jpg","attrs":{"Brand Name":"HUONA","Model Number":"Niti Wire","Certification":"ISO9001, RoHS","Place of Origin":"China"}}
Ti-Ni alloy, consisting of nickel and titaniumalloy in nearly equiatomic proportions, is known for its unique mechanical properties of shape memory and superelasticity. These properties occur in association with thermoelastic martensitic transformation. Superelasticity is a phenomenon at a temperature above the reverse transformation temperature range, associated with stress-induced martensitic and reverse transformations. The alloy exhibits high flexibility owing to its wide recoverable strain range, in which the stress is kept low. Since Ti-Ni alloy shows high corrosion resistance and good biocompatibility, it has been applied in the medical and dental fields.
Composition
The chemical composition of NiTi alloy is outlined in the following table.
Element
Value %
Element
Value %
Ni
40~50
Mo
<0.01
Ti
50~60
Si
<0.01
Al
<0.1
Fe
<0.05
Cu
<0.03
Mg
<0.02
Physical Properties
The physical properties of NiTi alloy are tabulated below.
Properties
Unit
Ni-Ti
Cu-Zn-Al
Cu-Al-Ni
Cu-Al-Be
Composition
Nickel titanium
Copper zinc aluminium
Copper aluminium nickel
Copper aluminium beryllium
Melting point
°C
1260-1310
950-1020
1000-1050
970-990
Density
Kg/m3
6400-6500
7800-8000
7100-7200
7300
Young's modulus
Gpa
95
70-100
80-100
90
Tensile strength (in martensite domain)
Mpa
800-1000
800-900
1000
900-1000
Breaking strength elongation
%
30-50
15
8-10
15
Fatigue limit in austenite domain
Mpa
350
270
350
−
Fabrication
Cold working
Since the Ti-Ni alloy is an intermetallic compound, cold workability is not good and there are many problems with using this method of fabrication. In cold working, it is necessary to keep the cold work rate at around 40% and then soften by annealing. Figure 5.8 shows the work hardening curve. Because the work hardening rate of Ti-Ni alloy is high, this makes the decrease in workability worse.
Hot processing
The workability of the Ti-Ni alloys is excellent compared with other SMAs, although it is inferior to that of steel; workability is especially good at high temperatures over 700 °C, where the Ti-Ni alloy becomes more stretchable due to its reduced strength as shown in Fig. 4.6. However, if excessive titanium is present locally, for example, due to segregation, a liquid phase appears at temperatures over 950 °C (Murray, 1996) and cracks may form during processing; thus it is advisable to use a processing temperature of 700 to 950 °C. In particular, since working speed is relatively fast in hot rolling, attention must be paid to avoid unregulated, local temperature increases due to the heat of processing.
Applications
NiTi alloy also has good biocompatibility and is compatible with human tissues without causing obvious rejection or allergic reactions, which makes it safe to be used in the manufacture of various implants and medical devices. 1 At the same time, NiTi alloy also has good corrosion resistance, high strength and lightweight characteristics. It can exist stably in the body for a long time without being corroded by body fluids or tissues, while providing sufficient strength while keeping the devices and implants lightweight.
Specifically, the application of NiTi alloy in the medical field includes but is not limited to:
Stents: such as heart stents, vascular stents, etc., used to support narrowed or occluded blood vessels and restore blood circulation.
Implants: such as orthopedic implants, used to repair or replace damaged bone tissue.
Catheters: used in various minimally invasive interventional and endoscopic surgical devices to help doctors perform precise treatment.
Occluders: used to block defects or holes in the heart or other blood vessels.
Main Applications
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
2008
Total Annual:
8000000-100000000
Employee Number:
100~120
Ecer Certification：
Verified Supplier
Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig... Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig...
