Thesis (Ph. D.)--Ohio State University, 2003. / Title from first page of PDF file. Document formatted into pages; contains xvi, 255 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: Glenn S. Daehn, Dept. of Materials Science and Engineering. Includes bibliographical references (p. 201-202).

Thesis (PhDApSc(MineralsandMaterials)--University of South Australia, 2004.

Thesis (doctoral)--Helsinki University of Technology, 1999. / Includes bibliographical references. Also available on the World Wide Web.

Thesis (Ph. D.)--Lehigh University, 2006. / Includes vita. Includes bibliographical references (leaves 387-394).

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Copies of author's previously published articles inserted. / Bibliography: leaves 254-264. / xx, 297, [26] leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Studies the effects of various weld geometry parameters, residual stresses and the combined axial and bending loadings on the fatigue behaviour of butt-welded steel joints. Presents ways of improving the fatigue strength. Simulates the effect of the induced surface compressive residual stresses on the welded joints (for the improvement of the fatigue life). Explains the phenomenon of large scatter band associated with fatigue tests results. Suggests a new procedure for performing and evaluating the fatigue tests. / Thesis (Ph.D.)--University of Adelaide, Dept. of Mechanical Engineering, 1996

Copies of author's previously published articles inserted. / Bibliography: leaves 254-264. / xx, 297, [26] leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Studies the effects of various weld geometry parameters, residual stresses and the combined axial and bending loadings on the fatigue behaviour of butt-welded steel joints. Presents ways of improving the fatigue strength. Simulates the effect of the induced surface compressive residual stresses on the welded joints (for the improvement of the fatigue life). Explains the phenomenon of large scatter band associated with fatigue tests results. Suggests a new procedure for performing and evaluating the fatigue tests. / Thesis (Ph.D.)--University of Adelaide, Dept. of Mechanical Engineering, 1996

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Ph.D. / Materials science / The influence of resonant and sub-resonant frequency vibration on the longitudinal residual stresses in A-36 mild steel weldments has been studied. Residual stress analysis was carried out using sectioning, x-ray and blind-hole-drilling techniques. The hole-drilling method was modified to take into account the effect of local plastic yielding due to stress concentration and the machining stresses, with a resultant accuracy comparable to that obtained by the sectioning method. As a result of the vibratory treatments, residual stress redistribution occurred near the weld; the peak stresses were decreased by up to 30%. The resonant frequency vibration had a more pronounced stress redistribution as compared to the sub-resonant frequency vibration. Transmission electron microscopy studies indicated local plastic deformation as the mechanism by which this stress reduction occurred. Constant amplitude axial fatigue experiments on samples machined from regions adjacent to the weld showed that both the vibratory techniques did not induce any fatigue damage.