摘要
对固溶处理的Al-Mg-Si-Sc-Zr合金分别进行80%变形室温轧制+250℃时效处理、80%变形液氮控温轧制+250℃时效处理,研究3种状态下合金的DSC曲线和微观组织。结果表明:轧制状态下合金DSC曲线的峰与固溶状态下相比向左发生了偏移,这说明变形可以缩短Al-Mg-Si-Sc-Zr合金时效峰值时间。对轧制前后的显微组织进行分析发现,轧制合金组织内形成了少量的孔洞,室温轧制状态的合金的孔洞尺寸比液氮控温轧制状态的合金大17%左右;时效处理后,孔洞的数量增加且尺寸增大。
The solid solution treated Al-Mg-Si-Sc-Zr alloy was subjected to 80% rolling deformation at room temperature and liquid nitrogen temperature and then treated by aging at 250 ℃. The DSC curves and microstructure of the alloy under three states were studied. The results show that the peak of DSC curve of the alloy in the rolled state is shifted to the left compared with the solid solution state, which indicates that the deformation can shorten the peak aging time of the Al-Mg-Si-Sc-Zr alloy. Through the analysis of the microstructure before and after rolling, it is found that a small number of pores are formed in the microstructure of the rolled alloy, the pore size of the alloy rolled at room temperature is about 17% larger than that of the alloy in the liquid nitrogen temperature-controlled rolling state, and the number and the size of the pores increase after aging treatment.
作者
王振
李亨
唐锴
石文超
吴玉程
WANG Zhen;LI Heng;TANG Kai;SHI Wen-chao;WU Yu-cheng(Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment,Hefei University of Technology,Hefei 230009,China;Institute of Industry&Equipment Technology,Hefei University of Technology,Hefei 230009,China;National-Local Joint Engineering Research Center of Nonferrous Metals and Processing Technology,Hefei University of Technology,Hefei 230009,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2019年第12期47-53,共7页
Transactions of Materials and Heat Treatment
基金
囯家重点研发计划(2017YFB0701804)
国家自然科学基金(51605128)
