The martensitic transformation texture in Ti-6Al-4V

The transformation texture associated with martensite formation in the titanium alloy Ti- 6Al-4V has been investigated. Samples were heated into the fully b phase and quenched to form a microstructure of very fine a' martensite with no evidence of diffusional transformation at the prior b grain boundaries. EBSD texture measurements on the martensite showed that within each prior b grain, although typically all 12 variants of a’ were formed, the fractions of variants was far from uniform. The a’ texture was markedly different from values calculated using equal variant probability, also indicating that significant variant selection was occurring during martensitic transformation. This effect was modelled on the basis of elastic interaction between martensite events.

Effect of transformation mechanism (static or dynamic) on final ferrite grain size

A simple series of test was developed to highlight and compare the difference between the static strain induced transformation (SSIT) and the dynamic strain induced transformation (DSIT) mechanism in grain refinement and also to investigate the origin of the difference between the two mechanisms. The results showed that while the SSIT sets up a two-dimensional impingement among the ferrite grains, it cannot avoid their coarsening (normal growth). However, the DSIT forms a group of grains with a three-dimensional impingement which does not coarsen and maintains their fine size throughout the transformation, thereby, reduces the final average grain size.

Social transformation and curriculum reform in Chinese physical education

This thesis examines how Chinese physical education teachers are experiencing curriculum reform within the context of broad social change. Using a qualitative framework the research findings reveal how structural, personal and cultural factors converge to limit the extent to which teachers are able to embrace and implement the new curriculum.

Mechanisms of dynamic strain induced transformation and post-deformation evolution

In this study, a novel experimental approach was applied to study the mechanism of the equiaxed shape retention in dynamic strain induced ferrite during deformation. The post-deformation ferrite evolution in both static and dynamic transformation was studied. The refinement potential and the origin of their differences in both mechanisms were analysed.

Microstructure and mechanical properties of thermomechanically processed TRansformation Induced Plasticity (TRIP) steels

One of the main aims of steel research for the automotive industry is to develop materials with the optimum combination of relevant properties, cost and productivity. The introduction of new TRansformation Induced Plasticity steels has been driven by the requirements to increase the ductility without compromising the strength. The main phenomenon responsible for the unique mechanical properties in these steels has been proposed to be the formation of multiphase structure, which can contribute to an increase in elongation during straining. The thesis studied the effect of the different alloying additions on the structure-property relationship in the TRIP steels.

Technogyny : the transformation of reproduction

Explores the major social and political consequences of new reproductive and genetic technologies. Increasingly the experience and process of reproduction is dominated by technology and medicine. Suggests an international institution such as the UN is likely to be the most effective in addressing the concerns associated with the technologies' adverse effects. Such intervention is unlikely without active and sophisticated lobbying from women around the world.

Circle of women : an indepth study of the spirituality and ceremony of a group of white Australian women

Explores the spirituality of some white, rural, Australian women, and includes their experience of ceremony as part of their shared spiritual practice. The women's self-identification, relationship with divinity, the land and their bodies are documented, together with their experience of ceremony and its power.

Ethics, aesthetics and the transformation of the self : Foucault's practice of philosophy

Drawing in part on research carried out in the Foucault archives in Paris, the thesis both undertakes a critical assessment of Foucault's late work and attempts to reconstruct the ethical attitude which was emerging in that work. It situates Foucault's project in the context of its Nietzschean inspiration and offers a Foucauldian model of ethics as an aesthetic, transformative work carried out upon the self - as a 'spiritual exercise' in which the critical practice of philosophy takes a central role.

Reproduction, resistance and transformation at Marantha High School

The focus of this thesis is the attempt by the Seventh-day Adventist Church to reproduce SDA culture in students attending one of its schools, Maranatha High School. As a 'critical ethnography', it adopts a theoretical perspective from critical social theory to examine problems associated with this attempt. These problems are reflected in data gathered by a range of ethnographic techniques. The study first portrays the socio-political dynamics underlying the historical creation of Adventist culture generally, its embodiment in institutional forms, and the development of a substantial educational structure intended to transmit that culture to succeeding generations.

The study then focuses on current SDA educational philosophy, and the assumptions underlying the principles of selection, organisation, transmission and evaluation of knowledge considered to be valid. It then examines how Maranatha High School itself seeks to implement those principles. In this context, the study also reflects on the political implications of the modes of management and institutional control adopted at various levels of the organisation and in the school.

As a dialectical study, the thesis views the school as a social setting in which knowledgeable humans engage in communicative interaction. Rather than promoting smooth reproduction, the school is portrayed as a site of struggle, negotiation and potential transformation as participants resist forces that they perceive to be constraining and oppressing them. Consequently the thesis examines the perceptions of the various groups of participants, and the nature and impact of their interaction. In as much as teachers are official 'managers' of SDA culture and knowledge, this examination focuses especially on their personal definitions of the situation, the dilemmas that confront them from internal and external sources, the development of their own cultural forms in response, and the implications this action has for cultural reproduction and continuity.

Variant selection during the c-to-ab phase transformation in hot-rolled bainitic TRIP-aided steels

The variant selection phenomenon during the austenite to bainite phase transformation in hot-rolled TRIP-aided steels was quantitatively characterized at the level of individual austenite grains. The reconstruction of the electron backscatter diffraction maps provided evidence that bainite grows by packets of laths sharing a common {1 1 1}_y plane in the austenite. The affect of hot deformation is to reduce the number of packets that form. It is suggested that slip activity is important in understanding this effect.