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The Effect Of Surface Indications On The Tensile Properties Of Cast Steel, Jeff Hamby
The Effect Of Surface Indications On The Tensile Properties Of Cast Steel, Jeff Hamby
All ETDs from UAB
The objective of this thesis was to study the effect of surface indications on the tensile properties of cast steel. Four cast steel grades were selected for evaluation; these grades include three carbon and low alloy steels (110/80, 165/135, and Eglin) and one high alloy steel (CF8M). Using these steels, tensile specimens were produced, inspected via MT/PT, categorized by surface indications (as-cast or machined), and tested. Bars with natural surface indications were tensile tested and the properties recorded. The presence of a 1/16 inch, 1/8 inch, or 1/4 inch flat-bottomed hole drilled through half the thickness mimicked a similar nonlinear …
Intercritical Heat Treatments In Ductile Iron And Steel, Ricardo Emilio Aristizabal
Intercritical Heat Treatments In Ductile Iron And Steel, Ricardo Emilio Aristizabal
All ETDs from UAB
Materials such as dual phase (DP) steels, transformation induced plasticity (TRIP) steels and dual phase ductile irons are produced by intercritical heat treatments. These materials can provide significant weight savings in the automotive industry. The goal of this dissertation is to study intercritical heat treatments in ductile iron and steel to optimize the production parameters. Three different aspects were addressed. First, common steels were intercritically austenitized and austempered (intercritically austempered) under a variety conditions. The results showed that common grade steels that were intercritically austempered exhibited tensile properties in the same range as DP and TRIP steels. The second study …