Effect of Grain Refinement on Mechanical Properties of Zn Alloys

McKay, David (2013). Effect of Grain Refinement on Mechanical Properties of Zn Alloys Honours Thesis, School of Engineering, The University of Queensland.

       
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Author McKay, David
Thesis Title Effect of Grain Refinement on Mechanical Properties of Zn Alloys
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2013
Thesis type Honours Thesis
Supervisor Mingxing Zhang
Total pages 40
Language eng
Subjects 0913 Mechanical Engineering
Formatted abstract
This thesis is in the form a review which aims to investigate the most advantageous method of refining cast zinc alloys. The review of the current literature in this report first establishes the contexts in which zinc is currently utilised. Its inherent properties match its current uses well; however they are fairly restrictive in allowing it to be used on a more variable approach. Zinc and its alloys gain can gain much needed application via refinement and strengthening techniques.

A review of several modern strengthening mechanisms is done, as well as a comparison between these methods to determine which would be most suitable for Zn. Whilst the focus of this report is on Zn as a cast alloy, a brief look is also had at mechanisms for refinement of wrought alloys. As a stepping point for the future these may be incredibly useful if zinc’s inherent poor properties can be altered in the casting stage.

It was reasoned that grain refinement would be the most advantageous mechanism for strengthening of Zn alloys. Using this approach, the most logical method of grain refinement in cast alloys is that of heterogeneous nucleation (which is intrinsically linked to homogeneous nucleation, so the topics were covered consecutively).

Further research is required into methods and mechanisms currently in use in more popular casting metals (such as Al and Mg) however at this moment it seems that a viable conclusion to draw is that Zn has much potential for strengthening via grain refinement. Compounded with this is the fact that it may be a viable substitute for elements that are currently used abundantly in casting.
Keyword Grain Refinement

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
 
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Created: Fri, 11 Dec 2015, 16:04:14 EST by Asma Asrar Qureshi on behalf of Scholarly Communication and Digitisation Service