Microstructure evolution of TA15 titanium alloy subjected to equal channel angular pressing and subsequent annealing at various temperatures

2011 ◽  
Vol 211 (8) ◽  
pp. 1364-1371 ◽  
Author(s):  
Yan Zhao ◽  
Hongzhen Guo ◽  
Zhifeng Shi ◽  
Zekun Yao ◽  
Yongqiang Zhang
Keyword(s):  
Titanium Alloy ◽  
Equal Channel Angular Pressing ◽  
Microstructure Evolution ◽  
Subsequent Annealing ◽  
Angular Pressing ◽  
Ta15 Titanium Alloy

Effects of Annealing on Microstructure and Microhardness of TA15 Titanium Alloy Processed by Equal Channel Angular Pressing

2011 ◽  
Vol 675-677 ◽  
pp. 735-738
Author(s):  
Yan Zhao ◽  
Hong Zhen Guo ◽  
Zhi Feng Shi ◽  
Yong Qiang Zhang ◽  
Ze Kun Yao ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Equal Channel Angular Pressing ◽  
Annealing Temperature ◽  
Static Recrystallization ◽  
Proper Time ◽  
Annealing Treatment ◽  
Angular Pressing ◽  
Α Phase ◽  
Ta15 Titanium Alloy ◽  
Ta15 Alloy

The primary purpose of the present work is to investigate the effects of annealing after equal channel angular pressing (ECAP) on microstructure and microhardness of TA15 titanium alloy. A study was performed by annealing treatment on the microstructure evolution and microhardness variation of ECAPed TA15 alloy. The results state that, static recrystallization occurred distinctly during annealing after ECAP. Since a sample was annealed at a proper temperature and for proper time after ECAP, a larger amount of well globularized and more homogeneous equiaxed α phase has been attained, grains have not grown observably, and the relief of residual stress and work hardening for subsequent processing and using has also been achieved. Accordingly, the optimum annealing parameters of ECAPed TA15 alloy were optimized to be 973 K and 1 hour. The microhardness level of the sample annealed after ECAP was lower than that unannealed, and the microhardness level decreased with the increasing annealing temperature and time.

Numerical Simulation of Microstructure Evolution in AZ31 Magnesium Alloy during Equal Channel Angular Pressing

2014 ◽  
Vol 609-610 ◽  
pp. 495-499
Author(s):  
Guo Cheng Ren ◽  
Xiao Juan Lin ◽  
Shu Bo Xu
Keyword(s):  
Finite Element ◽  
Magnesium Alloy ◽  
Equal Channel Angular Pressing ◽  
Microstructure Evolution ◽  
Element Model ◽  
Az31 Magnesium Alloy ◽  
Angular Pressing ◽  
Ecap Process ◽  
Element Simulation ◽  
3D Software

The microstructure and material properties of AZ31 magnesium alloy are very sensitive to process parameters, which directly determine the service properties. To explore and understand the deformation behavior and the optimization of the deformation process, the microstructure evolution during equal channel angular pressing was predicted by using the DEFORM-3D software package at different temperature. To verify the finite element simulation results, the microstructure across the transverse direction of the billet was measured. The results show that the effects strain and deformation temperatures on the microstructure evolution of AZ31 magnesium during ECAP process are significant, and a good agreement between the predicted and experimental results was obtained, which confirmed that the derived dynamic recrystallization mathematical models can be successfully incorporated into the finite element model to predict the microstructure evolution of ECAP process for AZ31 magnesium.

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