scholarly journals Microstructure Refinement and Texture Evolution of Titanium by Friction Roll Surface Processing

2009 ◽  
Vol 50 (1) ◽  
pp. 210-214 ◽  
Author(s):  
Meiqin Shi ◽  
Yoshimasa Takayama ◽  
Tomohiro Umetsu ◽  
Hajime Kato ◽  
Hideo Watanabe ◽  
...  
Keyword(s):  
Texture Evolution ◽  
Roll Surface ◽  
Surface Processing ◽  
Microstructure Refinement

Texture Evolution in Titanium and Aluminum Sheets Subjected to Friction Roll Surface Processing and Subsequent Annealing

2011 ◽  
Vol 702-703 ◽  
pp. 457-460 ◽  
Author(s):  
Yoshimasa Takayama ◽  
Mei Qin Shi ◽  
Yoshihiro Ougiya ◽  
Kenta Nonaka ◽  
Hideo Watanabe
Keyword(s):  
Surface Layer ◽  
Texture Evolution ◽  
Subsequent Annealing ◽  
Roll Surface ◽  
X Ray Diffraction ◽  
Surface Processing ◽  
Aluminum Sheets ◽  
Ebsd Technique ◽  
Evolution Of Microstructure ◽  
Electron Back Scattered Diffraction

Titanium and aluminum sheets were directionally strained by friction roll surface processing (FRSP). Severe shear strain was imposed into the surface layer and strain gradient was formed through the thickness of the sheet. The microstructure and texture in as-strained state were investigated by optical microscopy and X-ray diffraction technique. Ultra-fine grains in the surface layer of the titanium sheet were found to have a sharp texture with a preferred orientation strongly related to the FRSP direction. The evolution of microstructure and crystallographic texture of FRSPed samples during annealing were studied by electron back-scattered diffraction (EBSD) technique. Obvious preferred orientations of shear straining were obtained in the surface layer of both materials as a result from FRSP and subsequent annealing.

Microstructure and texture evolution in titanium subjected to friction roll surface processing and subsequent annealing

2012 ◽  
Vol 22 (11) ◽  
pp. 2616-2627 ◽  
Author(s):  
Mei-qin SHI ◽  
Yoshimasa TAKAYAMA ◽  
Chun-an MA ◽  
Hideo WATANABE ◽  
Hirofumi INOUE
Keyword(s):  
Texture Evolution ◽  
Subsequent Annealing ◽  
Roll Surface ◽  
Surface Processing

scholarly journals Texture Evolution in Aluminum Sheet Subjected to Friction Roll Surface Processing and Subsequent Annealing

2015 ◽  
Vol 56 (3) ◽  
pp. 303-312 ◽  
Author(s):  
Yoshimasa Takayama ◽  
Ryuichi Hamano ◽  
Takuya Arakawa ◽  
Kenta Nonaka ◽  
Hideo Watanabe ◽  
...  
Keyword(s):  
Texture Evolution ◽  
Subsequent Annealing ◽  
Aluminum Sheet ◽  
Roll Surface ◽  
Surface Processing

scholarly journals Texture evolution in aluminum sheet subjected to friction roll surface processing and subsequent annealing

2015 ◽  
Vol 65 (6) ◽  
pp. 234-243
Author(s):  
Yoshimasa Takayama ◽  
Ryuichi Hamano ◽  
Takuya Arakawa ◽  
Kenta Nonaka ◽  
Hideo Watanabe ◽  
...  
Keyword(s):  
Texture Evolution ◽  
Subsequent Annealing ◽  
Aluminum Sheet ◽  
Roll Surface ◽  
Surface Processing

In situ investigation of the primary recrystallization of alpha titanium in HVEM

1978 ◽  
Vol 36 (1) ◽  
pp. 634-635
Author(s):  
S. Naka ◽  
R. Penelle ◽  
R. Valle
Keyword(s):  
Dimensional Analysis ◽  
Texture Evolution ◽  
Cold Work ◽  
Three Dimensional ◽  
Primary Recrystallization ◽  
Thin Foils ◽  
In Situ Investigation ◽  
Grain Growth Model ◽  
Alpha Titanium

The in situ experimentation technique in HVEM seems to be particularly suitable to clarify the processes involved in recrystallization. The material under investigation was unidirectionally cold-rolled titanium of commercial purity. The problem was approached in two different ways. The three-dimensional analysis of textures was used to describe the texture evolution during the primary recrystallization. Observations of bulk-annealed specimens or thin foils annealed in the microscope were also made in order to provide information concerning the mechanisms involved in the formation of new grains. In contrast to the already published work on titanium, this investigation takes into consideration different values of the cold-work ratio, the temperature and the annealing time.Two different models are commonly used to explain the recrystallization textures i.e. the selective grain growth model (Beck) or the oriented nucleation model (Burgers). The three-dimensional analysis of both the rolling and recrystallization textures was performed to identify the mechanismsl involved in the recrystallization of titanium.

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