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Missouri University of Science and Technology
<p>Magnesium alloys -- Microstructure<br />Magnesium alloys -- Mechanical properties<br />Deformations (Mechanics)<br />Friction welding</p>
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Influence Of Microstructural Length Scale On Deformation Behavior Of Magnesium Alloys, Wei Yuan
Influence Of Microstructural Length Scale On Deformation Behavior Of Magnesium Alloys, Wei Yuan
Doctoral Dissertations
"Friction stir processing (FSP) is emerging as an effective tool for microstructural modification. Mg-Al-Zn alloys with different aluminum contents were subjected to FSP to achieve fine grained and ultrafine grained (UFG) structure. The objective of this work was to study the influence of microstructural length scale on the governing deformation and strengthening mechanisms of FSP magnesium alloys.
FSP introduced strong basal fiber texture and processing parameter dependent grain/precipitate size and distribution. Grain refinement promoted non-basal dislocation activation at room temperature. The strength of the alloy increased as a consequence of grain refinement following classic Hall-Petch relationship to different extents due …