top of page

Group

Public·10 members

Astm G99 05 Pdf Free


ASTM G99-05: A Standard Test Method for Wear Testing with a Pin-on-Disk Apparatus




Wear is a phenomenon that occurs when two surfaces slide against each other, resulting in material loss, friction, and heat generation. Wear can affect the performance, reliability, and durability of mechanical components and systems. Therefore, it is important to measure and evaluate the wear behavior of materials under different conditions.


One of the methods for wear testing is the pin-on-disk test, which involves a pin (or ball) sliding on a rotating disk. The pin and the disk are made of the materials to be tested, and the wear is measured by the mass loss, volume loss, or wear depth of the pin or the disk. The pin-on-disk test can simulate various types of wear mechanisms, such as adhesive wear, abrasive wear, and oxidative wear.




astm g99 05 pdf free



The ASTM G99-05 is a standard test method for wear testing with a pin-on-disk apparatus, issued by the American Society for Testing and Materials (ASTM). This standard specifies the apparatus, test specimens, test procedure, and calculations needed to perform a pin-on-disk wear test. The standard also provides guidance on how to report and interpret the test results.


The Apparatus




The pin-on-disk apparatus consists of a pin holder, a disk holder, a loading device, a drive system, an environmental chamber, and a measuring device. The pin holder is used to hold the pin specimen in contact with the disk specimen. The disk holder is used to support and rotate the disk specimen at a constant speed. The loading device is used to apply a normal load on the pin specimen. The drive system is used to control the speed and direction of rotation of the disk specimen. The environmental chamber is used to maintain a desired temperature and humidity during the test. The measuring device is used to measure the mass, volume, or depth of wear of the pin or the disk specimen.


The Test Specimens




The test specimens are cylindrical pins or balls and disks made of the materials to be tested. The dimensions and surface finish of the specimens should be specified according to the test objectives and conditions. The specimens should be cleaned and weighed before and after the test.


The Test Procedure




The test procedure involves the following steps:



  • Mount the pin and disk specimens on the pin holder and disk holder, respectively.



  • Set the desired normal load, sliding speed, sliding distance, and environmental conditions.



  • Start the test by bringing the pin specimen in contact with the disk specimen and rotating the disk specimen at a constant speed.



  • Stop the test after reaching the predetermined sliding distance or time.



  • Remove the pin and disk specimens from the apparatus and clean them.



  • Measure the mass, volume, or depth of wear of the pin or disk specimen.




The Calculations




The calculations involve the following parameters:



  • The mass loss (Δm) or volume loss (ΔV) of the pin or disk specimen.



  • The wear rate (k) of the pin or disk specimen, defined as Δm/L or ΔV/L, where L is the sliding distance.



  • The specific wear rate (K) of the pin or disk specimen, defined as k/F or k/P, where F is the normal load or P is the contact pressure.



  • The coefficient of friction (μ) between the pin and disk specimens, defined as F/T or F/Wr, where T is the tangential force or W is the weight of the pin specimen and r is its radius.




The Reporting and Interpretation




The reporting and interpretation of the test results should include:



  • A description of the apparatus, test specimens, test procedure, and calculations used in accordance with ASTM G99-05.



  • A presentation of the mass loss, volume loss, wear rate, specific wear rate, coefficient of friction, and other relevant data as graphs or tables.



  • A discussion of the wear mechanisms, wear modes, wear maps, wear transitions, wear regimes, and other wear phenomena observed or inferred from the test results.



  • A comparison of the test results with other data from literature or experiments under similar or different conditions.



  • A conclusion and recommendation based on the test objectives and findings.




Where to Find ASTM G99-05 PDF Free?




ASTM G99-05 is a standard document that can be purchased from the ASTM website or other authorized distributors. However, some websites may offer a free PDF version of ASTM G99-05 for download or viewing. These websites are not affiliated with ASTM and may not provide the latest or complete version of the standard. Therefore, users should exercise caution and verify the authenticity and validity of the PDF file before using it.


Some of the websites that claim to provide ASTM G99-05 PDF free are:



  • [Academia.edu]: This is a platform for academics to share research papers. A PDF file of ASTM G99-05 is available for download from this website, but it requires a user account and a valid email address to access it.



  • [GlobalSpec.com]: This is a website that provides engineering information and specifications for various products and services. A PDF file of ASTM G99-05 is available for viewing from this website, but it requires a user account and a valid email address to access it.



  • [ASTM.org]: This is the official website of ASTM International, the organization that develops and publishes standards for various industries and sectors. A PDF file of ASTM G99-05 is not available for free from this website, but users can purchase it online or request a quote for it.




Users should be aware that downloading or viewing ASTM G99-05 PDF free may violate the intellectual property rights of ASTM International and may not comply with the terms and conditions of use of the standard. Users should also be aware that using an outdated or incomplete version of ASTM G99-05 may lead to inaccurate or unreliable test results and conclusions. Therefore, users are advised to obtain ASTM G99-05 from the official source or other authorized distributors.


About

Welcome to the group! You can connect with other members, ge...
bottom of page