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Characterization Of Thermally Diffused Bordie Layers On Aisi 1018 Steel : Residual Stresses (By Synchrotron Radiation) And Microhardness, Joel A. Payne

Theses

Boronization is a thermal diffusion process in which needle like boride layers are formed at the surface of the metallic substrate. The boride coatings formed by the diffusion process have high hardness and strong ware and corrosion resistance. In order for coatings of this nature to be industrially successful, their service life should be long and characterization should be extensive. Measuring the residual stresses of the coatings caters to each of these aspects.

In this study, AISI 1018 steel samples were boronized by a powder-pack process for four hours at 850°C in an argon atmosphere. Characterization techniques included coating thickness, …

Flexural Behaviour Of Hybrid Frp-Concrete-Steel Double Skin Tubular Members, T Yu, Y L. Wong, J G. Teng, S L. Dong, E S.S Lam

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents the results of an experimental study on the flexural behavior of a new type of hybrid FRP-concrete-steel member as well as results from a corresponding theoretical model based on the plane section assumption and the fiber element approach. This new type of hybrid member is in the form of a double-skin tube, composed of a steel inner tube and an FRP outer tube with a concrete infill between the two tubes, and may be employed as columns or beams. The parameters examined in this study include the section configuration, the concrete strength, and the thicknesses of the …

In-Situ Observation Of Sulfide Precipitation In A Low-Carbon, Titanium Alloyed Steel, Sima Aminorroaya-Yamini, Rian J. Dippenaar, Mark H. Reid

Faculty of Engineering - Papers (Archive)

Removal of inclusions is of greatsignificance to steelmakers and the scientific principles underpinning inclusion removal has been the subject of numerous investigations in the past and during the last few decades, it has become increasingly obvious that inclusions can be utilized as an effective tool for the control of microstructure1 . Manganese sulfide precipitates are known to crystallize and precipitate preferentially in interdendritic regions during solidification, due to segregation of manganese and sulphur2 and these inclusions have traditionally been used for the dual purpose of improving the machinability and controlling of grain structure in steel. Small MnS particles restrain grain …

The Evaluation Of Tuyere Coke Probing Data At Bluescope Steel Port Kembla Works, Robert J. Nightingale, John Simpson, Brian J. Monaghan, Andrew Blakey, Vincent Daly

Faculty of Engineering - Papers (Archive)

Tuyere coke probings have been conducted at Port Kembla over the past decade. This period of operation spans significant change in coking coal preparation as well as the introduction of pulverised coal injection.

Continuous Wave Nd:Yag Laser Cladding Of Stellite 6 Multi-Track Layers On Mild And Aisi 4016 Steel, M Franklin, S W. Huang, M. Brandt, T Chandra, A. K. Tieu

Faculty of Engineering - Papers (Archive)

The level of sliding friction between the mating top centre and centre bowl liner components of a rail freight truck centre bearing provides both positive and negative effects on rail vehicle dynamics. Currently used centre bearing surfaces include AISI 1053 steel top centres mating against unlubricated and lubricated Hadfield steel, and polyethylene centre bowl liners. The wear life of the unlubricated AISI 1053 steel top centre against Hadfield steel is short, whilst the low friction of the lubricated and polyethylene surfaces can be detrimental to vehicle dynamics. It is proposed to use laser clad Stellite 6 as one of the …

Formation Of Ferrite Products During Continuous Cooling Of A Cu-Bearing Hsla Steel, S.S. Ghasemi Banadkouki, Druce P. Dunne

Faculty of Engineering - Papers (Archive)

A continuous cooling transformation (CCT) diagram was constructed by a combination of diatometry and metallographic methods for a Cu-bearing HSLA steel, which is a low carbon low alloy variant of the ASTM A710 type structural steel.

Fatigue Of Older Bridges In Northern Indiana Due To Overweight And Oversized Loads, Volume 1: Bridge And Weigh-In-Motion Measurements, James A. Reisert, Mark D. Bowman

JTRP Technical Reports

This report is the first of a two-volume final report presenting the findings of the research work that was undertaken to evaluate the fatigue behavior of steel highway bridges on the extra heavy weight truck corridor in Northwest Indiana. The purpose of the study was to evaluate the type and magnitude of the loads that travel along the corridor and then assess the effect of those loads on the fatigue strength of the steel bridge structures on the corridor. This volume presents the results of the experimental field study conducted to evaluate the load and load effects on one steel …