In the rail industry, sections of high strength Manganese steel are employed at critical locations in railroad networks. Ultrasonic inspections of Manganese steel microstructures are difficult to inspect with conventional means, as the propagation medium is highly attenuative, coarse-grained, anisotropic and nonhomogeneous in nature. Current in-service inspection methods are ineffective while p...

Vacuum thermal dealloying is a recently developed technique and was newly introduced to produce nanoporous metals, due its intriguing advantages, i.e., preventing oxidation producing no chemical waste, etc. Here, we report on the fabrication of stainless steel films by vacuum sputtered steel–magnesium precursor films. It found that crack-free can be successfully attained under broad temperature...

Armour steel is a medium-carbon which widely used in military and defense industries owing to its ability protect from projectile bullet pressure. However, this armour still posses mechanical limitation aspect, thus it needed engineer for improvement. Therefore, the aim of research undergo properties engineering by using heat treatment method austempering within temperature variations 200, 250,...

Title of Document: RFID SENSOR-DRIVEN STRUCTURAL CONDITION MONITORING IN INTEGRATED BUILDING INFORMATION MODELING ENVIRONMENT Linjia Bai, Doctor of Philosophy, 2013 Directed By: Yunfeng Zhang, Associate Professor Department of Civil and Environmental Engineering Steel structures are very popular structural forms for both buildings and bridges. Under extreme loading such as strong earthquakes or...

This work investigates the correlation between TiN inclusions and microstructural properties of HARDOX 450 steel using optical microscopy (OM), scanning electron (SEM), transmission (TEM), backscattered diffractometer (EBSD) methods. Some amount microsized were formed in temperature range solid–liquid zone; however, they exhibited fracture features deep dimples rather than a cleavage plane, whi...

Nanoscale co-precipitation in a novel high-strength low-carbon steel is studied in detail after isothermal aging. Atom-probe tomography is utilized to quantify the co-precipitation of co-located Cu precipitates and M2C (M is any combination of Cr, Mo, Fe, or Ti) carbide strengthening precipitates. Coarsening of Cu precipitates is offset by the nucleation and growth of M2C carbide precipitate, r...