Studies of selected mechanical properties of nitinol – shape memory alloy
Journal Title: Archiwum Odlewnictwa - Year 2010, Vol 10, Issue 3
Abstract
Because of their specific properties, shape memory alloys are applied in many domains. The investigations were conducted on nitinol alloy in the form of 3,1 mm diameter wire, whose Af temperature as stated by the manufacturer is Af =65oC. The wire was stretched in a strain hardened state and after annealing at 5000C. The influence of different heat treatments on the engineering stress – strain curve was investigated. Some samples were relieved and again loaded during tensile test. The plotted curves reflect the transformations that occur in alloy microstructure in high-temperature state (austenite) and low-temperature state (martensite).
Authors and Affiliations
J. Kłaput
Keywords
Related Articles
- EP ID EP72205
- DOI -
- Views 78
- Downloads 0
Thermal aspects of temperature transformations in silica sand
Problems related with the choice of moulding sand composition considering its behaviour in contact with molten metal were discussed. The investigations of high-temperature phenomena enable moulding sand composition to be...
Verification of Modification Effect on Prototype Castings from GJV Using Ultrasound Checking
Reason for and risks of using of cast iron with vermicular graphite for typical construction parts. Ultrasound checking of graphite shape. Factors influencing plausibility of result. Difference between laboratory and ope...
Microstructure of high-pressure die-casting AM50 magnesium alloy
Microstructure analyses of high-pressure die-casting AM50 magnesium alloy are presented. Investigated pressure casting was produced on a cold chamber die-casting machine with locking force at 1100 tones in “FINNVEDEN Met...
The modification process of AlSi21CuNi silumin and its effect on change of mechanical properties of the alloy
Due to difficulties present during machining operations and with segregation of crystals of primary silicon, hypereutectic silumins can be used after modification only. It is why elaboration of effective modification met...
Application of laser optical displacement sensor to foundry processes control and research
An experimental set-up elaborated for distance measurement with a use of a laser optical displacement sensor has been described. The features of the elaborated device allow to measure a surface roughness and dimensions o...