ABSTRACT Semi solid metallurgy offers distinct advantages over other near-net-shape manufacturing
processes. By this process, components are produced from slurry kept at a temperature
between the solidus and the liquidus isotherms, resulting in breakdown of the dendritic
structure. A new structure in which the morphology of the crystals of the primary phase is
globular evolves. In this present paper, the importance of globular structure is identified. The
theories of evolution of globular crystals in thixo–processing are identified and discussed.
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