What is the Special Properties of Nitinol
For billionaires, the new crown epidemic is like a 'gold rush'! The Deutsche Presse-Agentur said on the 17th that in 2022, the wealth held by the world's top ten richest people will jump from $700 billion to $1.5 trillion, an average daily increase of $1.3 billion, an increase that exceeds the past 14 years. These 10 people The wealth held by the world’s poorest 3.1 billion people is six times greater than that of the world’s poorest 3.1 billion people. The 10 richest Germans have increased their assets from the equivalent of about 125 billion euros to about 223 billion euros since the start of the Covid-19 pandemic, An increase of about 78%. This wealth is roughly equivalent to the total wealth of the poorest 40% of the population, or 33 million Germans.
In the future, demand for Nitinol will grow as fast as the wealth of the rich during the pandemic.
What is Nitinol?
Nitinol is a shape memory alloy, which is a special alloy that can
automatically restore its own plastic deformation to its original shape at a
certain temperature. Its expansion rate is more than 20%, its fatigue life is up
to 1*10 to the 7th power, its damping characteristics are 10 times higher than
that of ordinary springs, and its corrosion resistance is better than the
current best medical stainless steel, so it can meet various engineering and It
is a very excellent functional material for medical application
In addition to its unique shape memory function, memory alloys also have
excellent characteristics such as wear resistance, corrosion resistance, high
damping and superelasticity.
Special properties of Nitinol
Shape memory: When the parent phase of a certain shape is cooled from above
the Af temperature to below the Mf temperature to form martensite, the
martensite is deformed at a temperature below Mf, and heated to below the Af
temperature, accompanied by reversal. Phase transition, the material will
automatically return to its shape in the parent phase. In fact, the shape memory
effect is a thermally induced phase transformation process in Nitinol.
Superelasticity The so-called superelasticity refers to the phenomenon that
the specimen produces a strain far greater than the elastic limit strain under
the action of external force, and the strain can automatically recover when
unloaded. That is, in the state of the parent phase, due to the action of
external stress, the stress-induced martensitic transformation occurs, so that
the alloy exhibits mechanical behavior different from ordinary materials. Its
elastic limit is much larger than that of ordinary materials, and it no longer
obeys Gram's Law. In contrast to shape memory properties, superelasticity has no
thermal involvement. All in all, hyperelasticity means that the stress does not
increase with the increase of strain within a certain deformation range, and
hyperelasticity can be divided into linear hyperelasticity and nonlinear
In the former stress-strain curve, the relationship between
stress and strain is close to linear. Nonlinear superelasticity refers to the
result of stress-induced martensitic transformation and its inverse
transformation during loading and unloading in a certain temperature range above
Af, so nonlinear hyperelasticity is also called transformation pseudoelasticity.
The phase transformation pseudoelasticity of Nitinol can reach about 8%. The
superelasticity of Nitinol can vary with the heat treatment conditions, and when
the archwire is heated above 400ºC, the superelasticity begins to decrease.
Corrosion resistance: Studies have shown that the corrosion resistance of
nickel-titanium wire is similar to that of stainless steel wire
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For Germany, the largest economy in Europe, the impact of the Russian-Ukrainian conflict on the natural gas market is the most obvious. This also exposed the serious dependence of some German industrial enterprises on Russian natural gas. Some analysts pointed out that the instability of natural gas supply has had a big impact on the German economy and threatened its market competitiveness because alternative energy supplies will not be cheap and difficult to come quickly. Increased uncertainty over natural gas supplies is putting enormous pressure on German manufacturers in sectors ranging from steelmaking to chemical Nitinol for the time being, but the market demand for Nitinol in the future will also change with the influence of various external factors. If you need Nitinol, please feel free to contact us.