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Full-Text Articles in Engineering
Thermomechanical Behavior Of Nickel Base Single Crystal Superalloy Towards Understanding Of Weld Hot Cracking, S S. Babu, J M. Vitek, S A. David, M Murugananth
Thermomechanical Behavior Of Nickel Base Single Crystal Superalloy Towards Understanding Of Weld Hot Cracking, S S. Babu, J M. Vitek, S A. David, M Murugananth
Faculty of Engineering - Papers (Archive)
"Thermomechanical responses of three single crystal superalloys were measured in between 600 and 1200 degrees C using a thermomechanical simulator. On-heating results showed no softening while testing below 1000 degrees C. In contrast, extensive softening was observed while testing above 1000 degrees C. This rapid softening is related to dissolution of gamma' precipitates. During on-cooling tests from 1300 degrees C, strength recovery of these samples occurred only below 900 degrees C. The delay in strength recovery is attributed to the extent of undercooling required for rapid decomposition of the gamma phase into mixture of gamma and gamma' phases."
Effect Of Particle Composition On Consolidation Of Hot Briquetted Iron, Wanda Melfo, Rian J. Dippenaar, Brian J. Monaghan
Effect Of Particle Composition On Consolidation Of Hot Briquetted Iron, Wanda Melfo, Rian J. Dippenaar, Brian J. Monaghan
Faculty of Engineering - Papers (Archive)
The influence of the carbon concentration of directly reduced iron (DRI) powders on the compressibility and fracture strength of hot briquetted iron (HBI) has been studied. Industrially produced DRI, pure iron powder and Fe–C alloy powders (synthetic DRI) were used in the study. It was found that the mechanism of compaction could be attributed to pure yielding. The pressure required to attain a given density increased proportionally with the carbon content. The morphology and phases present in DRI powder had a significant influence on the compressibility. The fracture strength of the compacts increased with increasing carbon content of the DRI …
The Application Of Linear Elastic Fracture Mechanics To Optimize The Vacuum Heat Treatment And Nitriding Of Hot-Work Tool Steels, V. Leskovsek, Borivoj Sustarsic, David J. Nolan
The Application Of Linear Elastic Fracture Mechanics To Optimize The Vacuum Heat Treatment And Nitriding Of Hot-Work Tool Steels, V. Leskovsek, Borivoj Sustarsic, David J. Nolan
Faculty of Engineering - Papers (Archive)
Linear elastic fracture mechanics was used to optimise the vacuum-heat-treatment procedures for conventional hot-work AISIHII tool steel. The fracture toughness was determined with non-standard, circumferetially notched and fatigue-precracked tensile-test specimens.