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

Classification of the Modes of Dissociation in Immiscible Cu-Alloy Thin Films

1999 ◽  
Vol 564 ◽  
Author(s):  
K. Barmak ◽  
G. A. Lucadamo ◽  
C. Cabral ◽  
C. Lavoie ◽  
J. M. E. Harper
Keyword(s):  
Thin Films ◽  
Driving Forces ◽  
Texture Evolution ◽  
Substantial Reduction ◽  
Alloying Elements ◽  
X Ray Diffraction ◽  
Cu Alloy ◽  
Transmission Electron ◽  
Evolution Of Microstructure

AbstractWe have found the dissociation behavior of immiscible Cu-alloy thin films to fall into three broad categories that correlate most closely with the form of the Cu-rich end of the binary alloy phase diagrams. The motivation for these studies was to use the energy released by the dissociation of an immiscible alloy, in addition to other driving forces commonly found in thin films and lines, to promote grain growth and texture evolution. In this work, the dissociation behavior of eight dilute (3.3 ± 0.5 at% solute) binary Cu-systems was investigated, with five alloying elements selected from group VB and VIB, two from group VillA, and one from group 1B. These alloying elements are respectively V, Nb, Ta, Cr, Mo, Fe, Ru and Ag. Several experimental techniques, including in situ resistance and stress measurements as well as in situ synchrotron x-ray diffraction, were used to follow the progress of solute precipitation in approximately 500 nm thick films. In addition, transmission electron microscopy was used to investigate the evolution of microstructure of Cu(Ta) and Cu(Ag). For all eight alloys, dissociation occurred upon heating, with the rejection of solute and evolution of microstructure and texture often occurring in multiple steps that range over several hundred degrees between approximately 100 and 900°C. However, in most cases, substantial reduction in resistivity of the films took place at temperatures of interest to metallization schemes, namely below 400°C.

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

scholarly journals Effect of Shear Bands Induced by Asymmetric Rolling on Microstructure and Texture Evolution of Non-Oriented 3.3% Si Steel

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4696
Author(s):  
Zhiyong Fang ◽  
Yanhui Guo ◽  
Bin Fu ◽  
Liqun Wei ◽  
Jun Chen ◽  
...  
Keyword(s):  
Surface Layer ◽  
Thermal Energy ◽  
Annealing Temperature ◽  
Texture Evolution ◽  
Shear Bands ◽  
Subsequent Annealing ◽  
Asymmetric Rolling ◽  
Nucleation Sites ◽  
Different Temperatures ◽  
Complete Recrystallization

In the present work, the microstructure and texture of non-oriented 3.3% Si steel processed by asymmetric rolling (ASR) and subsequent annealing at different temperatures were compared with those obtained when using traditional symmetric rolling (SR). This work aims to reveal the effect of shear bands introduced by the ASR on the microstructure and texture evolution. The ASR sample reaches a recrystallization fraction of 62% at an annealing temperature of 650 °C, which is 32% higher than that of the SR sample annealed at the same temperature. This can be attributed to the abundant shear bands introduced by the ASR, which serve as the heterogeneous nucleation sites for the recrystallized grains. When increasing the annealing temperature to 750 °C, complete recrystallization could be observed in both asymmetric- and symmetric-rolled samples. When using an annealing temperature of 650 °C, the γ-oriented grains were dominant in the surface layer, while strong Goss-oriented grains could be observed in the center in the ASR sample. This is due to the fragmented small subgrains with different orientations in the surface layer inhibiting the nucleation of Goss- and cube-oriented grains during the annealing. In contrast, numerous Goss- and cube-oriented grains were formed in the surface layer after complete recrystallization when the ASR sample was annealed at a temperature of 750 °C. This may be related to the higher thermal energy, which benefits the nucleation of the Goss- and cube-oriented grains. In addition, ASR significantly increased the strength of η-fiber after complete recrystallization when compared with SR. This work might be helpful to design the rolling and the subsequent annealing processes.

scholarly journals Experimental Study of the Influence of Shot Peening on the Microstructure and Properties of Surface Layer of a TC21 Titanium Alloy

2017 ◽  
Vol 1 (1) ◽  
pp. 17-23
Author(s):  
Y. Song ◽  
Z. Zhao ◽  
F. Lu
Keyword(s):  
Titanium Alloy ◽  
Surface Layer ◽  
Shot Peening ◽  
Original Material ◽  
X Ray Diffraction ◽  
Nano Indentation ◽  
Microstructure And Properties ◽  
Α Phase ◽  
Transmission Electron ◽  
Electron Back Scattered Diffraction

The effects of shot peening on microstructure and properties of surface layer of a TC21 titanium alloy have been studied by transmission electron microscopy, electron back-scattered diffraction, X-ray diffraction and Nano-indentation. The results indicated that an elastic-plastic strengthening layer was formed on the surface of the TC21 alloy after the shot peening. During the deformation processing, the activated slip systems were found to be in <a>, <c> and <a/c> planes with high-density dislocations formed as networks in α phase. After the shot peening, the residual stress was found in the strengthening layer, which decreased from the surface to the interior, and the thickness of the surface layer was measured about 370 μm. The hardness by nano-indentation measurement increased two times as compared with the original material. After the shot peening, the fraction of the low-angle boundaries between 0-10º was estimated as 59.3% at the depth of 100 μm from surface. This surface layer microstructure improved resistance of deformation of the TC21 alloy, and therefore increased its fatigue strength.

Microstructure and Texture Evolution in a High Manganes Austenitic Steel During Tensile Test

2010 ◽  
Vol 638-642 ◽  
pp. 3272-3277 ◽  
Author(s):  
José A. Jiménez ◽  
Georg Frommeyer
Keyword(s):  
Plastic Strain ◽  
Texture Evolution ◽  
Microstructural Analysis ◽  
Tensile Tests ◽  
Fiber Texture ◽  
X Ray Diffraction ◽  
Tensile Direction ◽  
X Ray ◽  
Deformation Twins ◽  
Evolution Of Microstructure

The evolution of microstructure and texture in a Fe-22wt%Mn-0.6C% steel during plastic deformation was studied by interrupted tensile tests at plastic strain levels ranging from 5 to 40% at 10-3 s-1. The steel present in as-received condition a fully recrystallized austenitic microstructure and almost random texture. A microstructural analysis of deformed samples reveals the presence of thin bands. As no martensite was detected by X-ray diffraction, these striations must correspond to deformation twins. The amount of twins increases progressively with plastic strain. At lower deformation, these bands are parallel and start and terminate at the grain boundaries. As the strain level increases, the number of the twins band increases and they intersect each other. This evolution of the microstructure is accompanied by the appearance a fiber texture with the <111> and <100> directions parallel to the tensile direction

Microstructure and Texture Evolution in Cladded Al 3003 Aluminum Sheets

2017 ◽  
Vol 885 ◽  
pp. 159-164
Author(s):  
Adrienn Hlavacs ◽  
Márton Benke ◽  
Péter Barkóczy ◽  
Valéria Mertinger
Keyword(s):  
Cold Rolling ◽  
Texture Evolution ◽  
Base Material ◽  
Thickness Reduction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Volume Fractions ◽  
Aluminum Sheets ◽  
Reduction Function ◽  
Aluminium Sheets

In the present research, the texture variation during cold rolling of cladded 3003 type aluminium sheets was examined by means of X-ray diffraction. The aluminum sheets were formed in a series of 14 rolling steps, after which texture examinations were performed on both cladded and base material sides of the sheets. After certain rolling steps, the texture was also examined by removing layers from the sheets by electropolishing to reveal the texture distribution along depth. The texture was characterised through the calculation of volume fractions of the main rolled texture components. Local drawbacks were found in the texture versus thickness reduction function. The texture was found to be higher in the middle of the sheets than at the surface.

Sign in / Sign up

Export Citation Format

Share Document