Enhanced age-hardening response and compression property of a Mg-7Sn-1Ca-1Ag (wt.%) alloy by extrusion combined with aging treatment
作者： Wandong Li , Xuefei Huang , Xin Li , Weigang Huang
DOI: 10.1016/J.JALLCOM.2018.06.350
关键词:
摘要: Abstract The age-hardening response and compression property of a Mg-7Sn-1Ca-1Ag (wt.%) alloy are improved by extrusion combined with aging treatment (abbreviated as extruded-aged). corresponding microstructure evolution was investigated discussed in detail. results show that the average grain size refined obviously from ∼54.6 μm to ∼3.2 μm at 320 °C refinement CaMgSn phase is also exhibited. Extrusion process promotes precipitation Mg2Sn Mg54Ag17 more precipitates exists extruded-aged alloy. As result, compressive strength significantly enhanced peak-aged hardness ultimate (UCS) 95.2 HV 482 MPa, respectively, both which higher than as-aged as-extruded alloys. This mainly attributed refinement, formation increased content finer precipitates. Moreover, it found an obvious yield behavior occurs engineering stress versus strain extruded alloys, basal texture caused high value Schmid factor, leading easy {10–12} twinning during along direction.
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