![](https://pinterest.com/pin/create/button/?url=http://www.dartofscience.com/video/nitinol-wire/&media=http://www.dartofscience.com/wp-content/uploads/2016/11/nitinol-wire.jpg&description=<a href="http://www.dartofscience.com/wp-content/uploads/2016/11/NITINOL-WIRE-1.jpg"><img class="alignleft size-medium wp-image-869" src="http://www.dartofscience.com/wp-content/uploads/2016/11/NITINOL-WIRE-1-300x169.jpg" alt="nitinol-wire-1" width="300" height="169" /></a> Nitinol is an alloy of Nickel and Titanium, with the two elements present in roughly equal atomic percentages. Nitinol exhibits a few unique properties like shape-memory and superelasticity. This is because nitinol is not just an alloy, but it is what can be known as an intermetallic compound. This means that the constituent molecules of the metals are arranged in specific positions in the crystal lattice, as opposed to their random positioning in alloys. Depending upon the heat applied, nitinol alternates between two crystal lattice structures - austenite at high temperatures and martensite at low temperatures.
We heat the nitinol wire at approximately 7000C and shape it using a jig. At low<a href="http://www.dartofscience.com/wp-content/uploads/2016/11/NITINOL-WIRE-2.jpg"><img class="size-medium wp-image-870 alignright" src="http://www.dartofscience.com/wp-content/uploads/2016/11/NITINOL-WIRE-2-300x169.jpg" alt="nitinol-wire-2" width="300" height="169" /></a>er temperatures, martensite's monoclinic lattice structure allows the metal to deform without breaking any atomic bonds. When 50-700C heat is applied again, the structure reverts back to the austenite phase, it is able to remember its structure regardless of the deformation during the martensite phase. The same principle applies in the second part of our experiment. When deformative stress is applied to the nitinol wire during its cold (martensite) phase, it is able to regain its original shape by heating, lifting up the weights in the process.)
![](https://www.linkedin.com/shareArticle?mini=true&url=http://www.dartofscience.com/video/nitinol-wire/&title=NITINOL WIRE&summary=<a href="http://www.dartofscience.com/wp-content/uploads/2016/11/NITINOL-WIRE-1.jpg"><img class="alignleft size-medium wp-image-869" src="http://www.dartofscience.com/wp-content/uploads/2016/11/NITINOL-WIRE-1-300x169.jpg" alt="nitinol-wire-1" width="300" height="169" /></a> Nitinol is an alloy of Nickel and Titanium, with the two elements present in roughly equal atomic percentages. Nitinol exhibits a few unique properties like shape-memory and superelasticity. This is because nitinol is not just an alloy, but it is what can be known as an intermetallic compound. This means that the constituent molecules of the metals are arranged in specific positions in the crystal lattice, as opposed to their random positioning in alloys. Depending upon the heat applied, nitinol alternates between two crystal lattice structures - austenite at high temperatures and martensite at low temperatures.
We heat the nitinol wire at approximately 7000C and shape it using a jig. At low<a href="http://www.dartofscience.com/wp-content/uploads/2016/11/NITINOL-WIRE-2.jpg"><img class="size-medium wp-image-870 alignright" src="http://www.dartofscience.com/wp-content/uploads/2016/11/NITINOL-WIRE-2-300x169.jpg" alt="nitinol-wire-2" width="300" height="169" /></a>er temperatures, martensite's monoclinic lattice structure allows the metal to deform without breaking any atomic bonds. When 50-700C heat is applied again, the structure reverts back to the austenite phase, it is able to remember its structure regardless of the deformation during the martensite phase. The same principle applies in the second part of our experiment. When deformative stress is applied to the nitinol wire during its cold (martensite) phase, it is able to regain its original shape by heating, lifting up the weights in the process.&source=http://www.dartofscience.com)
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d’Art of Science partners with DFC 2017
Starting this year, d’Art of Science partners with DFC for promoting Hands-on/DIY Culture in Schools by starting a sub-award in the annual DFC Challenge. One school selected under the Best Prototype Award will get a chance to travel to Goa and develop their solution prototype in Goa with us. Over… READ MORE…
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