Grain growth and recrystallization behaviors of an ultrafine grained Al-0.6 wt%Mg-0.4 wt%Si-5vol.%SiC nanocomposite during heat treatment and extrusion
Access Status
Authors
Date
2018Type
Metadata
Show full item recordCitation
Source Title
ISSN
School
Collection
Abstract
A bulk ultrafine grained Al-0.6 wt%Mg-0.4 wt%Si-5vol.%SiC nanocomposite was fabricated by spark plasma sintering (SPS) of a corresponding nanocrystalline metal matrix nanocomposite powder produced by high energy mechanical milling. The as-SPSed samples were either heat treated or hot extruded at 500 °C. Microstructural characterization of the samples revealed that the ultrafine Al(Mg,Si) grains in the as-SPSed sample grew slightly and underwent recovery during heat treatment, and dynamic recrystallization, rapid grain growth and grain boundary dragging of SiC nanoparticles occurred during extrusion. The Al(Mg,Si) grain growth and grain boundary dragging of the SiC nanoparticles during extrusion resulted in aggregation of a large fraction of the SiC nanoparticles which in turn caused formation of regions with finer and coarser Al(Mg, Si) grains respectively.
Related items
Showing items related by title, author, creator and subject.
-
Shirdelmoghanloo, H.; Chen, Kefei ; Paynter, B.H.; Angessa, T. T.; Westcott, S.; Khan, H. A.; Hill, C. B.; Li, C. (2022)Heat stress is a primary constraint to Australia's barley production. In addition to impacting grain yield, it adversely affects physical grain quality (weight and plumpness) and market value. The incidence of heat stress ...
-
Hughes, Darren Michael (2010)The high rainfall zone (HRZ) of south west Western Australian (WA) has traditionally been dominated by livestock industries. However, a reduction in wool price throughout the 1990’s has stimulated a transition to farm ...
-
Billia, M.; Timms, Nicholas Eric; Toy, V.; Hart, R.; Prior, D. (2013)Quartzofeldspathic ultramylonites from the Alpine Fault Zone, one of the world's major, active plate boundary-scale fault zones have quartz crystallographic preferred orientations (CPO) and abundant low-angle (<10° ...