Load and speed are testing parameters. The load is usually achieve by applying a dead weight and speed may come from fixed speed motor or specified via motor controller. The travel is calculated by multiplying the number of rotations of the disk (instruments usually have a counter) by the circumference of the disk where the pin makes contact with the disk.
Sir kindly explain how can we use Archard's equation for the calculation of wear coefficient of pin sliding on plate? If sliding distance is not known, only known thing is the frequency, applied load and volume loss.
The hardness number is calculated by taking the force applied by the indenter divided by the area of the impression. While testing the load is usually specified in units of kgf and the area is measured in mm^2, however the hardness number is usually reported without these units. Nonetheless this "force by area" is similar to pressure so the units can be converted to MPa or GPa.
Which hardness value should be taken? In one case you have taken HB and in the other case you have taken HV, so numerically there is too much difference!!!
Thanks Walter!
; )
Very good explanation! Thanks, Dr. B!
I am glad you found it useful. Thank you for your comment : )
Veyr nicely explained Dr. Thank you
Thanks and welcome
Good explanation Sir
Much needed topic
Excellent Sir..
So nice of you
Is hardness in Pascals or Mega Pascals? If its megapascals why is it normal to bake them into wear coefficients?
thank you so much
thank you!
How do you calculate the load, speed and travel for the test?
Load and speed are testing parameters. The load is usually achieve by applying a dead weight and speed may come from fixed speed motor or specified via motor controller. The travel is calculated by multiplying the number of rotations of the disk (instruments usually have a counter) by the circumference of the disk where the pin makes contact with the disk.
Sir kindly explain how can we use Archard's equation for the calculation of wear coefficient of pin sliding on plate? If sliding distance is not known, only known thing is the frequency, applied load and volume loss.
it should be possible but you would need to know the duration of the test
Hardness is a number then how you convert it in to megapascal. Can you please clear?
The hardness number is calculated by taking the force applied by the indenter divided by the area of the impression. While testing the load is usually specified in units of kgf and the area is measured in mm^2, however the hardness number is usually reported without these units. Nonetheless this "force by area" is similar to pressure so the units can be converted to MPa or GPa.
Thank you, Sir.
Can you make a video on effect of plotting graph to stud the effect o parameter on each other
Which hardness value should be taken? In one case you have taken HB and in the other case you have taken HV, so numerically there is too much difference!!!
You can convert both to mpa
Yes, and then use the value for material/part you are concerned with.