Dissertation submitted to the faculty of Engineeung, University if the Witwatersrand, Johannesburg. in fulfilment of the requirements for the degree of Master of Science in Engineering. / This dissertation deals with alloys containing between 0.2 and 9.5wt%, carbon and between 3.2 and 64.3wt% vanadium with the balance iron. Alloys were produced by induction melting and followed by remelting in vacuum tungsten arc furnaces. No heat-treatment was performed, as the aim was to identify useful alloys that may be applied by hardfacing techniques in the field. The requirement of post weld heat-treatment would greatly limi~ the use af hardfacing alloys. TIle experimental techniques aimed at characterising the alloys included X-ray diffraction analyses, Mosshauer Spectroscopy, optical, scanning and transmission electron microscopy and chemical analyses white density measurements, hardness tests and 2 and 3 -body abrasion test gave the material properties. (Abbreviation abstract) / AC 2018

No description available.

No description available.

Thesis (PhD)--University of South Australia, 1997

Includes bibliographies. / 2 v. : [1] ill., [1] map ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / This thesis aims to tabulate information on the pattern of international trade in chromite and ferrochromium in a systematic form for the whole world during a period of more than fifty years prior to and including 1980. The study describes the main features of the international trade pattern, and outlines the various factors that have had an influence in determining the pattern of international trade in chromite and gerrochromium. / Thesis (Ph.D.)--University of Adelaide, Dept. of Commerce, 1997?

Thesis (Ph.D.)--University of Nebraska-Lincoln, 2007. / Title from title screen (site viewed Dec. 5, 2007). PDF text: xi, 137 p. : ill. ; 7 Mb. UMI publication number: AAT 3271927. Includes bibliographical references. Also available in microfilm and microfiche formats.

Thesis (Ph.D.) -- University of Adelaide, Dept. of Chemical Engineering, 1965. / [Typewritten].

Thesis--Wisconsin. / Includes bibliographical references (leaves 85-88).

Thesis--Wisconsin. / Includes bibliographical references (leaves 93-95).

A technique for the preparation of iron containing a fine dispersion of thoria particles has been developed. The method involves co-precipitation, hydrogen reduction and hot rolling in a reducing atmosphere at 1373°K. The mechanical properties of iron and iron-thoria strip have been investigated over the temperature range 77-373°K. The dispersion increased the strength and work hardening rate of iron, and reduced the ductility . The yield strength of the alloy has been explained in terms of dislocation multiplication rates and the stress dependence of dislocation velocity. The work hardening rate is regarded as a balance between the yield stress behaviour at low temperatures and recovery processes at the higher temperatures. The mechanics of neck and Luders band formation have been examined, and the observed fracture angles explained in terms of this analysis. The ductile-to-brittle transition temperature was found to be improved in the iron-thoria, as a consequence of both a finer grain size and the direct influence of the particles. / Applied Science, Faculty of / Materials Engineering, Department of / Graduate