Design and fabrication of shape memory device
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Date
2018-05
Authors
Mohammad Taufiq Haiqal Mohammad Musa
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Abstract
Shape Memory Alloys (SMAs) have been considered as one of the most
promising smart and advance materials. A lot of idea generated on using this advance
material for implementation into various applications such as actuator, biomedical
application and etc. Shape Memory Alloys demonstrate a unique ability to recover their
original shape after deformation through a reversible thermo-elastic phase transformation,
it allows shape memory alloys to recover large strains which can reach 8% the most.
Among the commercially available shape memory alloys, nickel–titanium ones are
outstanding due to their excellent performance and reliability.
A case study approached was employed to demonstrate the workable two-way
shape memory alloy. This study is aiming on the design and development of tool by
utilizing the two-way shape memory effect. The idea is to combine both shape memory
and pseudoelastic training. This method is to gain changes in the original hot shape together
with the transformation temperatures after the training process, and the effective outcome
of the cold shape. The shape set is an arc of 90o with 10cm length to for each of the sample
to illustrate the movement of flower petal. The experiment of dealing the Nitinol wire with
and without the presence of R-phase as it is the best realise that by supressing the R-phase
able to increase the range of martensite values. Furthermore, the training method used for
Nitinol wire to exhibit the two-way shape memory effect that gives respond towards the
change of surrounding temperature. Thus, the NiTi shape memory alloy able to develop
the two-way shape memory effect to perform the shape set for both martensite and austenite
phase.