scholarly journals Could face-centered cubic titanium in cold-rolled commercially-pure titanium only be a Ti-hydride?

2020 ◽  
Vol 178 ◽  
pp. 39-43 ◽  
Author(s):  
Yanhong Chang ◽  
Siyuan Zhang ◽  
Christian H. Liebscher ◽  
David Dye ◽  
Dirk Ponge ◽  
...  
Keyword(s):  
Pure Titanium ◽  
Face Centered Cubic ◽  
Commercially Pure Titanium ◽  
Commercially Pure ◽  
Cold Rolled ◽  
Face Centered

EBSD Investigation of Cold Rolled and Recrystallized Titanium

2013 ◽  
Vol 753 ◽  
pp. 289-292
Author(s):  
Mariusz Jedrychowski ◽  
Jacek Tarasiuk ◽  
Brigitte Bacroix
Keyword(s):  
Thermomechanical Treatment ◽  
Microstructure Evolution ◽  
Texture Evolution ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Topological Maps ◽  
Air Atmosphere ◽  
Commercially Pure ◽  
Cold Rolled

EBSD investigation of texture and microstructure evolution during a complete thermomechanical treatment of commercially pure titanium (HCP-Ti) is presented. Titanium was cold rolled to reach various degrees of thickness reduction: 20%, 40% and 60%. Next, annealing in air atmosphere was conducted at different conditions to achieve the recrystallized state. EBSD topological maps were measured on RD-TD and RD-ND surface of each sample. Strong heterogeneity of deformed titanium microstructures is described with focus on the important role of twinning mechanisms. Texture evolution in investigated titanium appears to be limited, especially in recrystallized state. However some subtle mechanisms are discussed.

Influence of Deformation Substructures on the Early Mechanisms of Recrystallization in Cold-Rolled Titanium and Zirconium

2005 ◽  
Vol 495-497 ◽  
pp. 711-718 ◽  
Author(s):  
N. Dewobroto ◽  
Nathalie Bozzolo ◽  
Francis Wagner
Keyword(s):  
Pure Titanium ◽  
Local Deformation ◽  
Commercially Pure Titanium ◽  
Titanium Sheet ◽  
Commercially Pure ◽  
Before And After ◽  
Nucleation Mechanisms ◽  
Grain Fragmentation ◽  
Cold Rolled ◽  
Short Times

The mechanisms governing the very first stage of static recrystallization in two hexagonal alloys (commercially pure titanium and low alloyed zirconium) are investigated in this paper. Initially fully recrystallized and equiaxed materials were cold-rolled to 80% thickness reduction and subsequently recrystallized at 500°C for short times. High resolution EBSD maps were acquired in a FEG-SEM before and after annealing in order to see where and how the new grains appear. Nonoriented nucleation mechanisms are involved in both materials, and there is a strong correlation between the local deformation substructures and the recrystallization kinetics. Recrystallization is extremely fast in the areas where the deformation cells are small and highly misoriented, i.e. in the areas which underwent severe grain fragmentation. Twinning plays an important role for that purpose in the studied titanium sheet.

scholarly journals Impact of rolling conditions on the hydriding of grade 2 titanium welded tubes

2020 ◽  
Vol 321 ◽  
pp. 09005
Author(s):  
La Chance LEPEMANGOYE ◽  
Nicolas CRETON ◽  
Virgil OPTASANU ◽  
Elise DELOYE ◽  
Tony MONTESIN ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Crystallographic Texture ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Asymmetrical Rolling ◽  
Commercially Pure ◽  
Pole Figures ◽  
Cold Rolled ◽  
Titanium Grade ◽  
The Impact

In this article, we study the impact of rolling conditions on the texture of the commercially pure titanium grade 2. In a previous work, NEOTISS in collaboration with ICB laboratory, shown that the texture highly influences the precipitation of hydrides in Titanium. In order to create different textures, Titanium sheets grade 2 are cold rolled asymmetrically and symmetrically with or without lubricant. The inverse pole figures and direct pole figures obtained allow us to deduce that symmetrical cold rolling does not change the grains orientation but generates a rotation of grains along c-axis (normal to basal plan). However, asymmetrical cold rolling leads to the formation of a new crystallographic texture, which could limit the formation of the hydrides in titanium grade 2 submitted to a hydrogen-rich environment. Key words: asymmetrical rolling, symmetrical rolling, titanium, hydriding, texture

scholarly journals Erratum to: Estimation of Dislocation Density in Cold-Rolled Commercially Pure Titanium by Using Synchrotron Diffraction

2014 ◽  
Vol 45 (4) ◽  
pp. 1579-1579 ◽  
Author(s):  
Hasan Alkhazraji ◽  
Mohammed Z. Salih ◽  
Zhengye Zhong ◽  
Mansour Mhaede ◽  
Heinz-Günter Brokmeier ◽  
...  
Keyword(s):  
Dislocation Density ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Synchrotron Diffraction ◽  
Commercially Pure ◽  
Cold Rolled

scholarly journals Effect of Electric Current Heat Treatment on Commercially Pure Titanium Sheets

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 783
Author(s):  
Chan-Hyeok Lee ◽  
Seong-Woo Choi ◽  
P. L. Narayana ◽  
Thi Anh Nguyet Nguyen ◽  
Sung-Tae Hong ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Electric Current ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Heat Treated Sample ◽  
Commercially Pure ◽  
Heat Treated ◽  
Conventional Heat Treatment ◽  
Cold Rolled ◽  
Current Heat

Rapid electric current heat treatment has been successfully applied to a cold-rolled sheet of commercially pure titanium (CP Ti). The electric current heat treatment was conducted at various temperatures (400, 500, 600 and 700 ∘C) by altering the current density (A/mm2). The detailed microstructure and texture evolution was studied using electron backscatter and X-ray diffraction analysis. For comparison, conventional heat treatment at 400, 500 and 600 ∘C were also applied to the cold-rolled sheets. The electrically heat-treated sample showed a much smaller and uniform grain size with a relatively weak texture than the conventionally heat-treated one. As a result, the electrically heat-treated samples exhibited better tensile properties than conventionally heat-treated samples. Furthermore, the electric current treatment produced minimum sheet distortion and good oxidation resistance compared with the conventional heat treatment.

Estimation of Dislocation Density in Cold-Rolled Commercially Pure Titanium by Using Synchrotron Diffraction

2014 ◽  
Vol 45 (4) ◽  
pp. 1557-1564 ◽  
Author(s):  
Hasan ALkhazraji ◽  
Mohammed Z. Salih ◽  
Zhengye Zhong ◽  
Mansour Mhaede ◽  
Hans-Günter Brokmeier ◽  
...  
Keyword(s):  
Dislocation Density ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Synchrotron Diffraction ◽  
Commercially Pure ◽  
Cold Rolled
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