Browsing by Author "Meller, E"

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    A metallographic study of the structure of oxide layers on zirconium alloys
    (Australian Atomic Energy Commission, 1972-11) Meller, E; Heuer, PM; Bradhurst, DH
    A study has been made of the effect of different metallographic mounting and polishing techniques on the appearance in cross section of the oxide layers formed on zirconium and its alloys under various conditions of oxidation. Optical micrographs were prepared after the various stages of polishing and compared with scanning electron micrographs of oxide fracture surfaces. For post-transition oxides on Zircaloy-2, similar detail was visible both on the fracture surfaces, and on polished surfaces after prolonged vibratory polishing. It is concluded that surfaces prepared by this technique probably best represent the 'as-grown' structure of the oxide.
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    Optical metallography of some maraging steels
    (Australian Atomic Energy Commission, 1981-05) Meller, E; Pollock, JTA
    The structural features of maraging steels including those that impose limitations on strength and toughness are briefly reviewed. Phase relationships in the iron-nickel matrix system are introduced which in conjunction with alloy composition and heat treatment allow the interpretation of microstructure. Details are presented of methods for revealing the microstructure of maraging steels; the prior austenite grain size following a variety of heat treatments is of special interest since excessive grain size can lead to poor ductility. These methods are illustrated with micrographs of the microstructures of MAR 350 and MAR 400 steels in the cast solution-treated aged and cold-worked states.