| Popis: |
Characterization of metal powders for the aerospace industry (titanium, superalloys, stainless steel, and high-strength low-alloy steels) involves documenting the average particle size, particle size distribution, surface area, flowability, apparent density, tap density, moisture content, and porosity in a powder. These attributes are in many cases, considered minimum required information by the end user. Frequently, the manufacturer of these powders provides a certificate of analysis, which contains this information. Additional characterization utilizing metallographic techniques is often provided to optimize the powder for each application. This chapter will review basic powder testing used as quality control tools for powders as well as the advanced metallographic techniques used to optimize the powder for a specific process. |
