Where is wear rate in pin on disc?
clean the pin in acetone, check the weight two to three time and note average weight. calculate the weight difference. the quantity can be divided by the linear path or as per required unit. Wear rate = (Mass of the sample before wear test – Mass of the sample after wear test)/sliding distance.
What is wear factor affecting wear rate?
Factors affecting the rate of wear: Hardness – particles with hardness lower than the surface cause little wear. Shape– angular particles cause greater wear than rounded particles. Size – larger particles cause more extensive wear as they carry more kinetic energy.
What is dry sliding wear test?
Dry sliding wear rate test was performed with three. parameters: applied load, sliding speed, and sliding distance and. varying them for three levels. According to the rule that degree. of freedom for an orthogonal array should be greater than or.
What is the Archard equation for wear?
These operations produce the Archard equation as given above. Archard interpreted K factor as a probability of forming wear debris from asperity encounters. Typically for ‘mild’ wear, K ≈ 10 −8, whereas for ‘severe’ wear, K ≈ 10 −2.
How do you calculate the wear rate?
A common used equation to compute the wear rate is (Archard,1953). V i =k i F s where F is the normal load, s the sliding distance, V i the wear volume and k i the specific wear rate coefficient.
How to calculate normal load per sliding distance and wear rate?
Usually wear rate is expressed and calculated as W=mm3/N.m where mm3refers to wear volume and N.m is normal load per sliding distance. The value of this equation is that is independent of hardness. The sliding distance can be calculated as the linear speed times the duration of the test. Hope this is helpful for you.
What is the K factor in the Archard equation?
This is accounted for by the addition of a dimensionless constant K, which also incorporates the factor 3 above. These operations produce the Archard equation as given above. Archard interpreted K factor as a probability of forming wear debris from asperity encounters. Typically for ‘mild’ wear, K ≈ 10 −8, whereas for ‘severe’ wear, K ≈ 10 −2.