Influence of Mg Contents on Aging Precipitation Behavior of Al-3.5Cu-xMg Alloy
来源期刊：Acta Metallurgica Sinica2014年第1期
论文作者：Siyu Li Jin Zhang Jinlong Yang Yunlai Deng Xinming Zhang
文章页码：107 - 114
摘 要：The influence of Mg content on the microstructures and mechanical properties at room temperatures of Al-3.5Cu-（0.71-1.81）Mg alloys was studied.Precipitation phases in the alloys were identified by TEM and HRTEM.The results show that when Mg contents increase from 0.71 to 1.81 wt%,the precipitates are transformed from S,S″,Ω,and θ’ phases to Sand S′phases,and Ω phase is first observed in Al-3.48Cu-0.71 Mg alloy with Cu/Mg mass ratio of 5 during the conventional aging heat treatment（190 ℃/12 h）.Regard to aging hardness effect of the tested alloys,the hardness of the alloys improves with the increase of Mg content,but the increases become slow when Mg content is greater than 1.35 wt%.
Siyu Li1,2，Jin Zhang1,2，Jinlong Yang1,2，Yunlai Deng1,2，Xinming Zhang1,2
1. State Key Laboratory of High-performance Complex Manufacturing, Central South University2. School of Materials Science and Engineering, Central SouthUniversity
摘 要：The influence of Mg content on the microstructures and mechanical properties at room temperatures of Al-3.5Cu-（0.71-1.81）Mg alloys was studied.Precipitation phases in the alloys were identified by TEM and HRTEM.The results show that when Mg contents increase from 0.71 to 1.81 wt%,the precipitates are transformed from S,S″,Ω,and θ’ phases to Sand S′phases,and Ω phase is first observed in Al-3.48Cu-0.71 Mg alloy with Cu/Mg mass ratio of 5 during the conventional aging heat treatment（190 ℃/12 h）.Regard to aging hardness effect of the tested alloys,the hardness of the alloys improves with the increase of Mg content,but the increases become slow when Mg content is greater than 1.35 wt%.
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