摘要
采用热力学模拟软件中的铝合金模块研究了Al-Zn-Mg-Cu系合金中不同Zn/Mg比及时效温度对析出相GP区及η′相的析出规律的影响。结果表明,GP区含量随Zn/Mg比的增加而降低,低温时效能够促进GP区的形成;而η′相含量随Zn/Mg比的增加略微降低,时效温度对η′相含量影响不大;与120℃相比,合金在160℃时效时η′相含量达到6.5%的时间缩短16 h;在相同温度下时效时,随Zn/Mg比的增加,η′相含量达到6.5%的时间先缓慢增加,当Zn/Mg比大于2.91时则快速增加。合金的淬火敏感性随Zn/Mg比的增加有所降低;随Zn/Mg比从2.46提高到3.20,GP区和η′相的鼻尖温度分别从150℃和330℃降低到140℃和320℃;临界冷却速率随Zn/Mg比的增加而逐渐降低。
The effects of Zn/Mg ratio and aging temperature on precipitation behavior(GP area andη′phase of Al-Zn-Mg-Cu)series alloys were investigated by using the aluminum alloy module in thermodynamic simulation software in detail.The results show that the content of GP area decreased with the increase of Zn/Mg ratio,and low temperature aging could promote the formation of GP area.However the content of η′phase decreased slightly with the increase of Zn/Mg ratio.The aging time was cut down about 16 h,when the alloy at 160℃than at 120℃;while under the same aging temperature,at different aging time with the increase of Zn/Mg ratio,the time when the content reached 6.5%,first increases slowly,and then increases rapidly when Zn/Mg ratio is greater than 2.91.The quenching sensitivity of the alloy decreases with the increase of Zn/Mg ratio,while with the Zn/Mg ratio increased from 2.46 to 3.20,the nose temperature of GP area andη′phase decrease from 150℃ and 330℃ to 140℃ and 320℃,respectively.The critical cooling rate reduced with the increase of Zn/Mg ratio.
作者
晁代义
孙有政
刘晓滕
李兴东
李维建
吕正风
程仁策
CHAO Daiyi;SUN Youzheng;LIU Xiaoteng;LI Xingdong;LI Weijian;LV Zhengfeng;CHENG Rence(National Engineering Research Center for Plastic Working of Aluminium Alloys,Shandong Nanshan Aluminum Co.,Ltd.,Longkou 265713;College of Nuclear Equipment and Nuclear Engineering,Yantai University,Yantai 264005)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2019年第S02期398-401,共4页
Materials Reports
