Metallographic analysis is primarily a collection of visual and imaging techniques that provide an insight into the background of a material or part and its behavior. Metallic specimens, both porous and pore-free, are opaque, and as a result, an optical examination must be performed on carefully prepared planar (two-dimensional) surfaces. This article discusses the preparation sequence of ferrous powders, which is normally separated into several well-defined steps: sample selection, sectioning, mounting, grinding, polishing, drying, and chemical etching and/or coating. It provides several suggestions to promote and encourage the safety of those performing metallographic preparation and analysis.
Thomas F. Murphy, Ferrous Powder Metallurgy Metallography, Powder Metallurgy, Vol 7, ASM Handbook, Edited By P. Samal, J. Newkirk, ASM International, 2015, p 156–167, https://doi.org/10.31399/asm.hb.v07.a0006116
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