Among the different designs, a pinondisk weartest rig has been commonly used to simulate twobody wear between the specimen and the antagonist. This standard is issued under the fixed designation g99. Realistic approach to pinondisc wear testing measurement. The contact surface of the pin may be flat, spherical or indeed of any convenient geometry, including that of actual wear components1.
A is the material of the disc, and b is the material of the pin. The test machine causes the disk specimen to revolve about the disk center. Keywords tribology, wear, pin on disc, introduction. Dry and lubricated test conditions a, wear profiles oscillation, circular and spiral b, independent ball and disk heating at 800 c c. A detailed study of the principles of friction, wear and lubrication i. It can be observed that coating 2 exhibits a much larger wear track compared to coating 1 after the 30 min wear test. This test is beneficial if you want to compare tribological properties of a pair of materials. Test procedure table 4 shows the pin on disc test matrix. A tribometer is an instrument that measures tribological quantities, such as coefficient of friction, friction force, and wear volume, between two surfaces in contact. The loss of material can be expressed as in weight loss, volume loss or height loss wear testing or quantification there are many methods and improvements for wear testing, they are called tribotester and tribometer. Application of pinondisc techniques for the study of tribological. Which way up if we run a pin on disc machine with the pin loaded onto the disc from above any wear debris generated will tend to accumulate on the surface. What are the advantages and disadvantages of a pinondisc. A ball crater after a pin on disc test on a low friction coating graphitic coating, load 80 n, pin on disc test time 30 minutes.
Pdf modeling and simulation of wear in a pin on disc tribometer. If the pin is flat ended, the alignment should be ensured, since otherwise nonuniform loading occurs resulting in nonuniform wear and possibly overloaded conditions. Pdf pin on disc wear testing is a method of characterizing the coefficient of friction, frictional force, and rate of wear between two materials. Sliding occurs between a stationary pin ball and a rotating disc at a fixed rpm speed continuously variable. Astm g99052016 standard test method for wear testing. Tool wear mechanisms can be studied under lab conditions using pinondisk or pinonflat tests 710 reducing the material cost and. Jan 09, 2016 design and development of pin disc wear tester part 5.
The tribometer is capable of loads up to 200 mn, 25 revolutions per minute and angular positioning resolution of 50 rad. Wear test is carried out to determine the amount of materials removed after a wear test. With over installed bases worldwide over the last 35 years, anton paars pinondisk tribometer is the standard for measurement of friction, wear, and lubrication. With the right environmental chamber one can also control and. Materials are tested in pairs under nominally nonabrasive conditions. The pinondisk measurement is usually done per astm g99052010 standard test method for wear testing with a pinondisk apparatus. The test machine causes either the disk specimen or the pin specimen to revolve about the. Standard test method for wear testing with a pinondisk. Dry sliding wear test conducted on pin ondisk testing setup. Application of a pinondisk test to determine abrasive wear. The pin on disk apparatus consists of several components which help the apparatus to perform its functions properly.
One, a pin is positioned perpendicular to the other, usually a flat circular disk. Pinondisk wear test an overview sciencedirect topics. Rely on the industry standard for friction, wear, and lubrication measurement. A new pin on disk wear testing method for simulating wear of polyethylene on cobaltchrome alloy in total hip arthroplasty.
Jun 11, 2014 pin on disk wear testing is a method of characterizing the coefficient of friction, frictional force, and rate of wear between two materials. Standard test method for wear testing with a pin on disk apparatus 1. An ultrananocrystallinediamond coated sphere was run on a 95 wt % au and 5 wt. With the right environmental chamber one can also control and measure the effect of humidity, temperature, and atmospheric composition. Pin on disk can simulate multiple wear modes, including.
Pinondisk wear test method covers a laboratory procedure for determining the wear of materials during sliding using a pin traveling on a rotating disk. Each test was performed twice to ensure repeatability. Wear testing and wear measurement university of miskolc. Guidance notes on test specimens phoenix tribology. Pdf standard test method for wear testing with a pinon. If a transfer film is created, the ball or pin sample ends up running on. Among the different designs, a pin on disk wear test rig has been commonly used to simulate twobody wear between the specimen and the antagonist. In this paper, a pin on disk test is carried out as an openended project in an introductory class in mechanical technology. The machine should also be capable for ball on disk single lever system in 1. There is a fact that almost all the machines due to wear lose their durability and reliability.
In view of the above said facts, a project work which is entitled as dry sliding wear test conducted on pindisk on testing setup for al6061sic metal matrix composites fabricated by powder metallurgy is undertaken by the student of post graduate. A new pinondisk wear testing method for simulating wear of. A ball, rigidly held, is often used as the pin specimen. A number in parentheses indicates the year of last reapproval. Our equipment allows us to test virtually any combination of materials to determine the effect of wear on a medical device.
Since the pin on disk test method does not attempt to duplicate all the conditions that may be experienced in service for example. Pin on disc wear testing machine technical specifications of pin on disc wear testing machine the machine should be able to carry out with testing as standard astm g 99 or equivalent. Wear rates for the pin and the disk are calculated from the volume or weight of material removed during the test. Astm g99 17 standard test method for wear testing with a. The principal areas of experimental attention in using this type of apparatus to measure wear are described. A and b will be used in the remainder of this paper to identify different material combinations. Though the method appears simple and relatively quick in producing results mckinney, 1982, the repeatability of results using the same test conditions i. Tender disc wear iitjindian institute of technology jodhpur. The pin on disc tester is used extensively to measure the friction and wear rate of low friction coatings such as diamond like carbon prior to coating actual components such as automotive valve trains.
Friction results and in situ wear track images were. Under these conditions, the wear occurs on the softer material, sometimes accompanied by the generation of a transfer film on the harder material. Pinondisk wear testing involves abrading two materials one material is machined into a pin, the other into a disk to determine a variety of wear properties. Design and manufacturing of a pinondisk wear testing apparatus. These properties include frictional force coefficients and wear rates of your. These unique, high capacity machines allow for the testing of several material combinations at a time, on a single test frame. Chapter 6 wear testing measurement wear is a process of removal of material from one or both of two solid surfaces in solid state contact. Design and manufacturing of a pinondisk wear testing. Pin on disc wear testing free download as pdf file. Pressureinduced tribofilm formation with triboconditioning.
Advances in tribological testing of artificial joint. Schematic of a pin on disc wear test and the arrangement of samples. Standard test method for wear testing with a pin ondisk apparatus1 this standard is issued under the. Since the pinondisk test method does not attempt to duplicate all the conditions that may be experienced in service for example. Dry sliding wear tests for different number of specimens was conducted by using a pinondisc machine model. By this the wear disc between each grind can used be used for many test by positioning the specimen pins at different diameter wear track diameter on wear disc. With this machine one can control test parameters such as speed, contact pressure hence pv, and time. Pdf this project was carried out the design and fabricate a circular pin disc wear tester with effective cost and efficient wear tester pin on. This continuous rotating pinflatballondisk fig 1 tribometer is one of. One, a pin with a radiused tip, is positioned perpendicular to the other, usually a. In fact, let us see it this way, pin ondisc tribometer may be used to model wear and lubricant behavior when the actual parts are having a linear relative velocity which is fairly constant like. Micro tribometer facility pin ondisk astm g99 wear of materials is one of the most important causes of failure of components like acetabular cup and ball etc. As the wear is a surface removal phenomenon and occurs mostly at outer surfaces, it is more appropriate and economical to make surface modification of existing alloys than using the wear resistant alloys.
Now that clinically relevant wear mechanisms could be facilitated on multidirectional pin on disk testers, test parameters that would produce clinically relevant rankings of materials based on their wear rates had to be identified. In a pin on disc wear tester, a pin is loaded against a flat rotating disc specimen such that a circular wear path is described by the machine. A pinondisk tribometer with in situ optical profilometry was constructed. Wear can be defined as the phenomenon of removing the material from the surface due to interaction with a mating surface. A very efficient, incremental implementation of archards wear model on the global scale for pin wear and disc wear in a pinondisc tribometer is presented.
Investigation of wear characteristics of aluminum disc. Pdf standard test method for wear testing with a pinondisk. Astm g9917 standard test method for wear testing with a. Summary of test method if loss of mass is measured, the mass loss value is converted to 3. Experimental objective indian institute of technology madras. Either the pin or the disk can be the test piece of interest.
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