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Full-Text Articles in Metallurgy
Measurement Of Planar Fault Probabilities In Austempered Ductile Iron And 304l Stainless Steel, Nathan Peterson
Measurement Of Planar Fault Probabilities In Austempered Ductile Iron And 304l Stainless Steel, Nathan Peterson
Dissertations, Master's Theses and Master's Reports
During plastic deformation both stacking and twin faults can be generated in face-centered cubic materials, including iron-based metals that contain thermally stable austenite. These planar faults are a critical component of the austenite to martensite transformation, forming shear bands that can act as nucleation sites. The measurement of these faults via x-ray diffraction has been long established, however it has not been applied widely to austempered ductile irons. The ability to measure these faulting probabilities could give insights into the transformation as a function of deformation. In this work both planar fault densities were measured in austempered ductile iron to …
Effects And Limitations Of Residual Alloying Elements In Silicon Solid Solution Strengthened Ferritic Ductile Iron, Julia Scruton
Effects And Limitations Of Residual Alloying Elements In Silicon Solid Solution Strengthened Ferritic Ductile Iron, Julia Scruton
Dissertations, Master's Theses and Master's Reports
Transitioning from traditional grades of ductile iron to solution strengthened ferritic ductile iron (SSFDI) grades can be difficult because of the need to reduce the amount of pearlite promoting elements, particularly copper and manganese, which are used in traditional grades. Knowing the acceptable threshold of residual alloying elements will allow for more cost-effective tailoring of the charge stream. Data were generated from a series of casting trials with the target grade of EN-GJS-500-14 where the levels of copper and manganese were varied from 0.05% to 0.3% and 0.15% to 0.4% respectively while maintaining silicon in the 3.8%-4.3% range. The pearlite …