Determine hardness of material, Mechanical Engineering

Assignment Help:

Determine hardness of material:

Hardness is surface property. It can be defined as resistance of material against permanent deformation of surface in the form of scratch, indentation, cutting, or mechanical wear. The requirement of hardness test arises from the fact that in numerous engineering applications, 2 components in contact are made to slide over each other. Eventually, their surfaces are scratched and they may fail because of mechanical wear. This result in not only quick replacement of both parts but also incurs big loss in the terms of money.

For instance, piston ring of an I.C engine remains in sliding contact with cylinder body when piston reciprocates within the cylinder. If proper care is not taken in the selection of materials for then, the piston rings and cylinder will wear soon.

In this case replacement or repairing of cylinder block will require much time, trouble and money. Thus, the material of piston rings and cylinder block should be taken such that wear is least on cylinder. Thus in case of repairing, cheaper piston rings can be easily replaced. This envisages that the material of cylinder block should be harder than material of piston rings so that cylinder wears the least. This can be ascertained by the conduct of hardness test. This is why it is essential to know how this test can be conducted.


Related Discussions:- Determine hardness of material

Explain reaction turbine and impulse turbine, Differentiate Reaction turbin...

Differentiate Reaction turbine and Impulse turbine (steam turbines) (b) In a De Laval turbine, steam issue from the nozzle with a velocity of 850 m/s. The nozzle angle is 20 o C

Drive chain cleaning and adjustment , Drive Chain Cleaning and Adjustment :...

Drive Chain Cleaning and Adjustment :  The service life of the drive chain depends on proper lubrication and adjustment. Poor maintenance can cause premature wear or damage to driv

Show leak area preparation, Q. Show Leak Area Preparation? Clearly mark...

Q. Show Leak Area Preparation? Clearly mark the location of the leak on the flange with a permanent marker. Notes: 1. Depressurizing hydrocarbon lines in non-emergency event

Axis perpendicular to the vertical plane - tetrahedron, Axis perpendicular ...

Axis perpendicular to the vertical plane - tetrahedron: A tetrahedron of side 60 millimeter has its base parallel to the VP, along with an edge of the base inclined at 45 o t

Explain the tool signature, Explain the Tool Signature The tool angles ...

Explain the Tool Signature The tool angles have been standardized by the American standards association. The seven important elements comprise the signature of the cutting tool

Total resistance of the system between the electrodes, The total resistance...

The total resistance of the system between the electrodes consists of (i) The resistance of the work piece R 1 (ii) The contact resistance between the electrodes and the wo

Determine strap beam with suitable demonstration, Determine strap beam with...

Determine strap beam with suitable demonstration. Here observe that R e becomes greater than P e by a magnitude of V while R i becomes less than P i by a magnitude equal to

What are the two ways of pile foundation, What are the two ways of pile fou...

What are the two ways of pile foundation Pile foundations can be installed in two ways. Timber, steel and precast concrete piles, are driven from the ground using hammers till

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