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

Roll-compacting, Q. Describe the continuous production of metal strip by ro...

Q. Describe the continuous production of metal strip by roll compacting of powder. Differentiate between impregnation and infiltration. Ans. Roll-compacting : It is the

Aeroengines - compressible flow, All fluids are to some extent compressible...

All fluids are to some extent compressible but gases show significant changes in density if pressure and/or temperature is changed. Some gas flows can be treated as being incomp

Determine payback and npv, Payback & NPV Julia Corp. is in the business o...

Payback & NPV Julia Corp. is in the business of making sugar cookies. The company is considering the purchase of a new cookie making machine which will improve its manufacturing

Nash equilibrium, how to get ns2 coding for nash equilibrium

how to get ns2 coding for nash equilibrium

Mine ventilation assignment, Describe the method of undertaking an anemomet...

Describe the method of undertaking an anemometer traverse for a airflow

Project, list 10 major project topic in agricultural engineering

list 10 major project topic in agricultural engineering

Coupling and cohesion, advantages and disadvantages of coupling and cohesio...

advantages and disadvantages of coupling and cohesion

Multi-threading problem in operating system, multi-threading problem in ope...

multi-threading problem in operating system 9. With multi-threading, each thread has its own value for the program counter, its own register save area, and its own stack, but all t

Ts diagram, how to find points on Ts diagram?

how to find points on Ts diagram?

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