图书来源:二元合金相图及中间相晶体结构 二元合金相图及中间相晶体结构
作 者:唐仁政 田荣璋
出版时间:2009-05
定 价:320元
图书ISBN:978-7-81105-831-4
出版单位:中南大学出版社
Liang-ming Yan,Jian Shen,Jun-peng Li,Zhou-bing Li,and Xiao-dong Yan General Research Institute for Nonferrous Metals,Beijing 100088,China
摘 要:The hot deformation behavior and microstructures of Al-7055 commercial alloy were investigated by axisymmetric hot compression at temperatures ranging from 300°C to 450°C and strain rates from 10-2 to 10 s-1,respectively.Microstructures of deformed 7055 alloy were investigated by transmission electron microscopy (TEM).The dependence of peak stress on deformation temperature and strain rate can be expressed by the hyperbolic-sine type equation.The hot deformation activation energy of the alloy is 146 kJ/mol.Moreover,the flow stress curves predicted by the modified constitutive equations are reasonably consistent with the experimental results,which confirms that the proposed deformation constitutive equations can provide evidence for the selection of hot forming parameters.TEM results indicate that dynamic recovery is the main softening mechanism during hot deformation.
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