Taipei Machine Tool Show
Taipei Machine Tool Show
Date: 2017/03/07-2017/03/12
Welcome to visit and advise
Related Press Release
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Sectioning is the first critical step in metallographic specimen preparation. The purpose of sectioning is not merely to reduce a material to an observable size, but to obtain a representative cross-section without altering its original microstructure. When excessive heat is generated during sectioning, the specimen surface may undergo tempering, rehardening, phase transformation, oxidation discoloration, plastic deformation, microcracking, or the development of residual stresses. These thermal effects and mechanical damage may persist through subsequent grinding and polishing processes, ultimately leading to misinterpretation of the material's original microstructure during microscopic examination.
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2026 07-17KnowledgeWhy Are Metallographic Specimens Reworked? Understanding the Real Reasons for Regrinding, Repolishing, and Re-Etching Through Process Variations
The purpose of metallographic analysis is to reveal the internal microstructure of a material in a reliable and reproducible manner for observation and interpretation. When the specimen surface contains scratches, smearing, deformation layers, edge rounding, contamination, under-etching, or over-etching, the microscopic image may no longer represent the material itself but instead reflect artifacts introduced during specimen preparation. Under such circumstances, specimen rework is often required.
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