Abstract
ABSTRACT Using several line powders (particle size 15-65 μ m). the rheological parameters of tensile strength ( σf,mb) and plastic deformation coefficient (Y) were experimentally measured at ambient and elevated temperatures. In order to be aeratable. the rheological parameters of a specific powder should satisfy the equation of σf,mb = 0.11Y0 89.The formation of agglomerates or dead zones can be predicted. By introducing the “Quasi porous solid body model,” the theoretical derivation of the criterion characteristic curve was accomplished using solid fracture theory.
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