The Effect of Hydrostatic Tensile Stress on Fracture in Some Structural Alloys

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Using Bridgman-type tensile specimens with natural necking profile, the characteristics of fracture in some structural alloys are summarized as failure maps which can express the characteristics as a curved surface divided by the dominance of micromechanism of fracture in three-dimensional space (fracture strain-temperature-hydrostatic tensile stress). (SCI. REP. RITU, A-Vol. 29, No. 1, 1980, p. 50) In this paper, interrelations between fracture strain and hydrostatic tensile stress are analyzed and discussed in various fracture modes and examples of application of the failure map to the estimation of toughness of materials and to the prediction of the occurrence of internal damage during wire drawing process are presented.

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