Improving mechanical properties and yield asymmetry in high-speed extrudable Mg-1.1Al-0.24Ca (wt.%) alloy by high Mn addition
作者： T. Nakata , C. Xu , R. Ajima , Y. Matsumoto , K. Shimizu
DOI: 10.1016/J.MSEA.2017.11.085
关键词:
摘要: Abstract The chemical composition of a Mg-1.1Al-0.33Ca-0.44Mn (wt%) alloy, AXM10304, has been optimized for high speed extrusion. extrudability is substantially improved from 24 m/min to 60 m/min by slightly reducing the Ca content 0.33 wt% 0.24 wt%. Then, effect Mn on mechanical properties and microstructures extruded Mg-1.1Al-0.24Ca based alloys were investigated. In solution-treated condition, tensile yield stress enhanced 200 MPa with increasing up 0.68 wt% compressive also 164 MPa 1.0 wt% due grain size refinement. After an artificial aging, Guinier Preston zones dispersed within Mg matrix, stresses are increased 70 MPa 30 MPa regardless content. Consequently, peak-aged 1.1Al-0.24Ca-1.0Mn AXM1021, exhibits 263 MPa 197 MPa good asymmetry 0.74 (a ratio one).
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