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Full-Text Articles in Engineering
Nano-Size Hydroxyapatite Powders Preparation By Wet-Chemical Precipitation Route, N Monmaturapoj
Nano-Size Hydroxyapatite Powders Preparation By Wet-Chemical Precipitation Route, N Monmaturapoj
Journal of Metals, Materials and Minerals
In this study, wet-chemical process was performed to prepare nano-size hydroxyapatite (HA) powders (≈10 nm) by varying concentration (low, medium and high) of the starting solutions in order to increase the amount of as-dried HA powders with different process conditions. Particle sizes and density were analyzed and differential thermal analysis was used to determine the glass transition (Tg) and the onset crystallization (Tc) temperatures. XRD and SEM were performed to identify phases and microstructure. The wet-chemical precipitation using low concentration of starting solution under reflux environment could be the optimize process to induce the formation of hydroxyapatite rather than tricalcium …
Stormwater Drainage Manual 2008, Christopher B. Burke, Thomas T. Burke
Stormwater Drainage Manual 2008, Christopher B. Burke, Thomas T. Burke
Indiana Local Technical Assistance Program (LTAP) Publications
This manual is a comprehensive catalog of procedures, design methods and criteria, and general background information which will enable the designer to quickly learn or review the basic principles of storm drainage design. Subjects included are precipitation and hydrological cycle, runoff and its estimation, open channels, flow in gutters and inlets, stormwater storage, storm sewer system design, computer applications for computing watershed runoff, and water quality. Included in the appendices are basics of statistical analysis, fundamentals of hydraulics, and a list of regulatory agencies and governmental bodies which may have jurisdiction over drainage projects.
Effect Of Nb And Mo Additions On The Microstructure And Mechanical Properties Of Thermomechanically Processed And Bake Hardened Cmnsi Trip Steel, E V. Pereloma, I. B. Timokhina, M. K. Miller
Effect Of Nb And Mo Additions On The Microstructure And Mechanical Properties Of Thermomechanically Processed And Bake Hardened Cmnsi Trip Steel, E V. Pereloma, I. B. Timokhina, M. K. Miller
Faculty of Engineering - Papers (Archive)
Bake hardening of steels during paint baking of an automotive body could result in an increase of their strength. In this work, the effect of pre-straining and bake-hardening on the microstructure and mechanical properties has been investigated in thermomechanically processed CMnSi Transformation-Induced Plasticity (TRIP) steels with and without additions of Nb and Mo. The steels were characterised before and after bake hardening at 180oC for 30 min. by transmission electron microscopy (TEM), X-ray diffraction (XRD), atom probe tomography (APT), and tensile tests. The microstructure of the thermomechanically processed (TMP) TRIP steels consisted of polygonal ferrite, bainite, retained austenite and martensite. …
Nanoscale Characterisation Of Advanced High Strength Steels Using Atom Probe Tomography, E V. Pereloma, I. B. Timokhina, P. D. Hodgson, M. K. Miller
Nanoscale Characterisation Of Advanced High Strength Steels Using Atom Probe Tomography, E V. Pereloma, I. B. Timokhina, P. D. Hodgson, M. K. Miller
Faculty of Engineering - Papers (Archive)
Over the last few years, there has been significant interest in the design of new high strength steels with complex microstructures and the manipulation of their properties at the nanoscale. Understanding the effects of alloying additions on the nanoscale level is essential for tailoring the steel composition and properties for a specific product requirement. Atom probe tomography plays an important role in the characterisation of the microstructural features at the atomic level. This powerful technique has been used for the direct experimental observations of early stages of phase transformations, clustering, fine precipitation, atmospheres around dislocations and segregation to boundaries. An …
Nanostructural Engineering Of Steel, P. D. Hodgson, I. B. Timokhina, H. Beladi, I. Sabirov, E V. Pereloma
Nanostructural Engineering Of Steel, P. D. Hodgson, I. B. Timokhina, H. Beladi, I. Sabirov, E V. Pereloma
Faculty of Engineering - Papers (Archive)
The concept of microstructural engineering of steels is well established and is the basis for a wide range of processes and products. Recently, though, there has been increasing emphasis in developing microstructures that have submicron length scales and also in understanding in far greater detail the structures and solute effects that are occurring at the nanoscale. In this review it is proposed that we are heading towards the situation where we are applying nanostructural engineering concepts in the development of new steels. A range of examples are given as well as a discussion of the potential impact of new processing …