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Report on

Shape memory alloys
Name: ‫ﻓﺮﺝ‬ ‫ﻣﺤﻤﺪ‬ ‫ﻣﺤﻤﻮﺩ‬‫ﺃﺣﻤﺪ‬
Section: 7
No: 169

Introduction:
A shape‐memory alloy (SMA, smart metal, memory metal, memory alloy, muscle wire,
smart alloy) is an alloy that "remembers" its original shape and that when deformed
returns to its pre‐deformed shape when heated.
Applications:

Manufacture:
There are various ways to manufacture Nitinol. Current techniques of producing nickel‐
titanium alloys include vacuum melting techniques such as electron‐beam melting, vacuum
arc melting or vacuum induction melting. "The cast ingot is press‐forged and/or rotary
forged prior to rod and wire rolling. Hot working to this point is done at temperatures
between 700 ° C and 900 ° C" (Stoeckel and Yu, 3).
There is also a process of cold working of Ni‐Ti alloys. The procedure is similar to titanium
wire fabrication. Carbide and diamond dies are used in the process to produce wires
ranging from 0.075mm to 1.25mm in diameter.

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Shape memory alloys

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Shape memory alloys