scholarly journals Surface Nanocrystallization and Amorphization of Dual-Phase TC11 Titanium Alloys under Laser Induced Ultrahigh Strain-Rate Plastic Deformation

Materials ◽  
2018 ◽  
Vol 11 (4) ◽  
pp. 563 ◽  
Author(s):  
Sihai Luo ◽  
Liucheng Zhou ◽  
Xuede Wang ◽  
Xin Cao ◽  
Xiangfan Nie ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Strain Rate ◽  
Titanium Alloys ◽  
Dual Phase ◽  
Surface Nanocrystallization ◽  
Ultrahigh Strain

scholarly journals Microstructural effects on strain rate and dwell sensitivity in dual-phase titanium alloys

2019 ◽  
Vol 162 ◽  
pp. 136-148 ◽  
Author(s):  
Sana Waheed ◽  
Zebang Zheng ◽  
Daniel S. Balint ◽  
Fionn P.E. Dunne
Keyword(s):  
Strain Rate ◽  
Titanium Alloys ◽  
Dual Phase ◽  
Microstructural Effects

The Effect of Strain Rate on the Plastic Deformation Mode of CP-Ti during Surface Nanocrystallization

2011 ◽  
Vol 675-677 ◽  
pp. 239-242
Author(s):  
Chun Huan Chen ◽  
Cheng Jin ◽  
Rui Ming Ren
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Strain Rate ◽  
Shot Peening ◽  
Pure Titanium ◽  
Deformation Mode ◽  
Rate Variation ◽  
Commercially Pure Titanium ◽  
Surface Nanocrystallization ◽  
Cp Ti

The effect of the strain rate on the surface nanocrystallization of titanium is investigated both theoretically and experimentally in this paper. The strain rate variation and stress distribution from surface to the interior of titanium during shot peening are estimated firstly using finite element method. Then shot peening experiment is carried out on a commercially pure titanium (CP-Ti) plate, and the obtained surface microstructures is characterized by transmission electron microscopy (TEM). Combining theoretical simulations and experimental observations, the effect of strain rate on the strain accommodation mechanism and plastic deformation mode are discussed. It is concluded that the strain rate and stress achieve the highest at the top surface layer of CP-Ti, and the strain rate decrease dramatically from the surface to the interior. The strain rate at the top surface layer is up to 104 s-1, which leads to superplastic deformation of Ti. There is no mechanical twin in the surface layer, instead, deformation lamella and adiabatic shear bands are the dominating microstructures. By means of rotation recrystallization, those deformation bands evolve to nanocrystallines.

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