Abstract
In this paper, the microstructure, hardness, tensile deformation and fracture behavior of a structural steel (ASTM A572-Grade 50) is presented and discussed. Specifically, the influence of test specimen orientation on microstructure of the as-provided material and resultant influence of microstructure on hardness, tensile properties and final fracture behavior are examined. Aspects related to the macroscopic mode and the governing intrinsic microscopic features that result from fracture of the steel specimens machined from the two orientations, longitudinal and transverse, are also examined. The microscopic mechanisms governing quasi-static deformation and final fracture behavior of this structural steel are discussed in light of the conjoint influence of test specimen orientation, intrinsic microstructural effects and nature of loading.
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