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Articles 1 - 3 of 3
Full-Text Articles in Engineering
Effects Of Composition And Solid Solution Strengthening On The Compression Strength Of Iron-Based Hardfacing Alloys, Tyler Wiggins, Samuel Garrison-Terry
Effects Of Composition And Solid Solution Strengthening On The Compression Strength Of Iron-Based Hardfacing Alloys, Tyler Wiggins, Samuel Garrison-Terry
Materials Engineering
Three iron-based hardfacing alloys were fabricated to have a tungsten strengthened matrix with varying compositions of 10-15, 20, and 30 wt% tungsten/chrome boride content. The fourth sample was fabricated to have a molybdenum solid solution strengthened matrix with 10-15 wt% W/Cr Boride content. This project focuses on the compressive strength of iron-based hardfacing alloys. Preliminary compression tests with Scoperta iron-based hardfacing alloys showed a need for sample dimension reduction due to compressive loads that could not be met by a 50 kN maximum capacity mechanical testing system. The preliminary tests showed compressive strengths exceeding 2340 MPa. Samples of the current …
Fatigue Performance Improvement In Aisi 4140 Steel By Dynamic Strain Aging And Dynamic Precipitation During Warm Laser Shock Peening, Chang Ye, Sergey Suslov, Bong Kim, Eric Stach, Gary Cheng
Fatigue Performance Improvement In Aisi 4140 Steel By Dynamic Strain Aging And Dynamic Precipitation During Warm Laser Shock Peening, Chang Ye, Sergey Suslov, Bong Kim, Eric Stach, Gary Cheng
Dr. Chang Ye
Warm laser shock peening (WLSP) is a thermomechanical treatment technique combining the advantages of laser shock peening and dynamic strain aging (DSA). Through DSA, WLSP of steel increases the dislocation density and stabilizes the dislocation structure by pinning of mobile dislocations by carbon atoms. In addition, WLSP generates nanoscale carbide precipitates through strain-induced precipitation. The carbide precipitates stabilize the microstructure by dislocation pinning. This results in higher stability of the dislocation structure and thus improves the stability of the compressive residual stress. In this study the mechanism of fatigue performance improvement in AISI 4140 steel by WLSP is investigated. It …
Hierarchically Porous Carbon-Zirconium Carbide Spheres As Potentially Reusable Transmutation Targets, Nicholas Scales, Jun Chen, Tracey L. Hanley, Daniel P. Riley, Gregory R. Lumpkin, Vittorio Luca
Hierarchically Porous Carbon-Zirconium Carbide Spheres As Potentially Reusable Transmutation Targets, Nicholas Scales, Jun Chen, Tracey L. Hanley, Daniel P. Riley, Gregory R. Lumpkin, Vittorio Luca
Australian Institute for Innovative Materials - Papers
The preparation of hierarchically porous phase-pure carbon-zirconium carbide spheres with surface areas upwards of 70 m2/g and diameters in the 1-2 mm range has been achieved. The zirconium carbide beads were prepared through carbothermal reduction of polyacrylonitrile-zirconium composites prepared via three different routes including infiltration of a zirconium precursor into preformed polyacrylonitrile (PAN) beads and two one-pot co-precipitation methods. Depending on the route used to prepare the composites, relatively high surface area phase-pure zirconium carbides with the radial macroporous internal structure of the PAN template could be prepared. The adsorption of the elements U, Mo, Cs and Sr …