The primary objective of metallographic examinations is to reveal the constituents and structure of metals and their alloys by means of a light optical or scanning electron microscope. In special cases, the objective of the examination may require the development of less detail than in other cases, but under nearly all conditions, the proper selection and preparation of the specimen is of major importance. Because of the diversity in available equipment and the wide variety of problems encountered, the following standard presents for the guidance of the metallographer only those practices that experience has shown are generally satisfactory; it cannot and does not describe the variations in technique required to solve individual specimen preparation problems.
ICS CODE77.040.99 (Other methods of testing metals)
ASTM E3-11(2017), Standard Guide for Preparation of Metallographic Specimens, ASTM International, West Conshohocken, PA, 2017, www.astm.org