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  2. Metallurgical assay - Wikipedia

    en.wikipedia.org/wiki/Metallurgical_assay

    The precious metal purity and content of these coins is guaranteed by the respective mint or government, and, therefore, the assay of the raw materials and finished coins is an important quality control. In the UK, the Trial of the Pyx is a ceremonial procedure for ensuring that newly minted coins conform to required standards.

  3. Metallography - Wikipedia

    en.wikipedia.org/wiki/Metallography

    A micrograph of bronze revealing a cast dendritic structure In some cases, the metallographic structure is large enough to be seen with the unaided eye. Metallography is the study of the physical structure and components of metals, by using microscopy.

  4. Nondestructive testing - Wikipedia

    en.wikipedia.org/wiki/Nondestructive_testing

    Because NDT does not permanently alter the article being inspected, it is a highly valuable technique that can save both money and time in product evaluation, troubleshooting, and research. The six most frequently used NDT methods are eddy-current, magnetic-particle, liquid penetrant, radiographic, ultrasonic, and visual testing. [3]

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  6. Metal testing - Wikipedia

    en.wikipedia.org/wiki/Metal_Testing

    Metal testing is a process or procedure used to check composition of an unknown metallic substance. [1] There are destructive processes and nondestructive processes. Metal testing can also include, determining the properties of newly forged metal alloys .

  7. Metallurgy - Wikipedia

    en.wikipedia.org/wiki/Metallurgy

    Metallurgy derives from the Ancient Greek μεταλλουργός, metallourgós, "worker in metal", from μέταλλον, métallon, "mine, metal" + ἔργον, érgon, "work" The word was originally an alchemist's term for the extraction of metals from minerals, the ending -urgy signifying a process, especially manufacturing: it was discussed in this sense in the 1797 Encyclopædia ...

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