Polymorphism, Other Engineering

Assignment Help:

Q. Define the polymorphism.

Ans. POLYMORPHISM: It is defined as the change in atomic structure which occurs at a definite transformation temperature. The cooling diagram of iron. Iron exists more than one atomic structure depending upon temperature.

The melting point of iron is 1539 degree C. When molten iron solidifies from the liquid state at 1539 degree C and just below 1539 degree C, then the iron has B.C.C. structure.

This structure is called delta iron. When it is further cooled at 1401 degree C. The structure now converts into F.C.C. structure.

This is called γ iron, it is non-magnetic on further drop in temperature i.e. at 910 degree C it again converts in two B.C.C. structure. This is called α-iron. The α-iron is non magnetic up to 768 degree C.

When further drop in temperature from 768 degree C it becomes magnetic but atomic structure remains unchanged.


Related Discussions:- Polymorphism

Avionic systems design- primed stability derivatives, Primed stability der...

Primed stability derivatives The rolling and yawing motions are coupled through the cross inertia I XZ due to rotation not being about the principal axes. Since in general air

Construct the element matrix numerically using the 2, 1. The cantilever bea...

1. The cantilever beam-like structure shown below is modeled using a 2 x 10 mesh of rectangular four-node plane stress elements of equal size. Geometric boundary conditions at x ?

Plane transmission diffraction grating, A diffraction grating is an optical...

A diffraction grating is an optical element that diffracts light into its constituent wavelength (colors). It is an excellent device used in laboratory to study the spectra. Co

Liquid crystal display (lcd), Liquid crystal display (lcd): Liquid Crys...

Liquid crystal display (lcd): Liquid Crystal Displays (LCD) are not actually light sources - they generate no light, merely filtering incident light, in a controlled manner.  T

sweep effects, In the previous discussion, we investigated the static aero...

In the previous discussion, we investigated the static aeroelastic behaviour of straight (unswept) wings. These wings are characterised by an effective decoupling of wing bending a

Civil sit problems & its solution, two frames are not joint properly so cre...

two frames are not joint properly so create gap between two frames so material lick from this gap

Kan bans in manufacturing enviornment, what are the advantages of dual-card...

what are the advantages of dual-card Kanban system campared to single card in a manufacturing environment

The operational amplifier , The operational amplifier : The integrated ...

The operational amplifier : The integrated circuit operational amplifier is one of the most useful and versatile electronic devices available today.  The name 'operational ampl

Aviation legislation - registration of aircraft, Aviation legislation - REG...

Aviation legislation - REGISTRATION of AIRCRAFT: All aircraft must be registered in the U.K., before they are permitted to fly. They must also have their allotted registration

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd