scholarly journals Texture Memory Effect in Heavily Cold-Rolled Ni3Al Single Crystals

2007 ◽  
Vol 539-543 ◽  
pp. 1513-1518 ◽  
Author(s):  
Masahiko Demura ◽  
Ya Xu ◽  
Toshiyuki Hirano
Keyword(s):  
Single Crystals ◽  
Orientation Relationship ◽  
Grain Growth ◽  
Memory Effect ◽  
Texture Evolution ◽  
Primary Recrystallization ◽  
Drastic Change ◽  
Texture Memory ◽  
Cold Rolled ◽  
Two Stages

The paper presented the texture evolution during primary recrystallization and following grain growth in the heavily cold-rolled Ni3Al single crystals. It turned out that the texture evolution occurred in the two stages. First, primary recrystallization caused the drastic change of the as-rolled texture. Then, as grain growth proceeded, the texture returned to the same one as the as-rolled textures. This texture return can be designated as Texture memory effect. The mechanism of the texture memory effect was discussed based on the analysis of the orientation relationship between the as-rolled and the primary recrystallization textures.

Texture and Ductility of Ni3Al Foils

2011 ◽  
Vol 306-307 ◽  
pp. 116-119
Author(s):  
Masahiko Demura ◽  
Ya Xu ◽  
Toshiyuki Hirano
Keyword(s):  
Grain Boundary ◽  
Grain Growth ◽  
Memory Effect ◽  
Texture Evolution ◽  
High Mobility ◽  
Two Stage ◽  
Texture Memory ◽  
Highly Effective ◽  
Cold Rolled

This article presents the texture evolution and the ductility improvement of the cold-rolled foils of boron-free Ni3Al during the recrystallization and the subsequent grain growth. The cold-rolled foils had sharp {110} textures. After the recrystallization at 873K/0.5h, the texture was disintegrated with several texture components. Interestingly, most of them had a single rotation relationship. i.e. 40˚ around <111>. With the progress of the grain growth, however, the texture returned to the sharp, cold-rolled textures. This two-stage texture evolution, called as “Texture memory effect”, was explained assuming a high mobility of the grain boundary with the 40˚<111> rotation relationship. The texture returning was highly effective to improve the ductility of the foils.

Texture Memory Effect During Heat Treatment in the Heavily Cold Rolled Ni3Al Foils

2006 ◽  
Vol 980 ◽  
Author(s):  
Masahiko Demura ◽  
Ya Xu ◽  
Kyosuke Kishida ◽  
Toshiyuki Hirano
Keyword(s):  
Grain Growth ◽  
Memory Effect ◽  
Electron Backscatter Diffraction ◽  
Early Stage ◽  
Texture Evolution ◽  
Diffraction Method ◽  
Goss Texture ◽  
Preferential Growth ◽  
Texture Memory ◽  
Cold Rolled

AbstractTexture evolution during grain growth was examined in the 84% cold-rolled Ni3Al with a Goss texture, {110}<001>, using the electron backscatter diffraction method. By recrystallization at 873K/0.5h, the texture was disintegrated and composed of several orientations, most of which had a 40° rotation relationship about <111> to the Goss orientation. Also, a small number of the Goss grains existed. With grain growth, the Goss grains grew faster than the 40°<111> rotated grains, leading to the texture reversion to the original, Goss texture. This phenomenon can be referred to Texture memory effect. In the early stage of the grain growth, the preferential growth occurred on the Goss grains surrounded by the 40°<111> rotated grains. It can be thus ascribed to the high mobility of 40°<111> grain boundary. In the late stage, the Goss grains were adjacent to each other and the preferential growth was accelerated. It is considered that the adjacent Goss grains survived in the grain coalescence process since the boundary between them are low angle boundary having a low energy.

scholarly journals Texture memory effect in heavily cold-rolled Ni3Al single crystals

2007 ◽  
Vol 55 (5) ◽  
pp. 1779-1789 ◽  
Author(s):  
M DEMURA ◽  
Y XU ◽  
K KISHIDA ◽  
T HIRANO
Keyword(s):  
Single Crystals ◽  
Memory Effect ◽  
Texture Memory ◽  
Cold Rolled

Texture Development of Ni3Al Thin Foils during Recrystallization and Grain Growth

2004 ◽  
Vol 467-470 ◽  
pp. 447-452 ◽  
Author(s):  
Masahiko Demura ◽  
Kyosuke Kishida ◽  
Ya Xu ◽  
Toshiyuki Hirano
Keyword(s):  
Grain Growth ◽  
Texture Evolution ◽  
Boundary Energy ◽  
Primary Recrystallization ◽  
Goss Texture ◽  
Preferential Growth ◽  
X Ray ◽  
Thin Foils ◽  
Cold Rolled ◽  
The Difference

The texture evolution of 83% cold-rolled Ni3Al foils during recrystallization was examined through heat treatments at 600 °C, 800 °C, and 1000 °C for 30 min. X-ray texture measurements revealed that the texture changed from the as-rolled Goss to a transitional complicated one by primary recrystallization and eventually returned to the Goss texture during grain growth. The SEM-EBSD analysis revealed that the return to the Goss texture was accompanied by the decrease of random boundaries (RBs) and the increase of S1 boundaries. The preferential growth of the Goss-oriented grains was explained by the difference in the grain boundary energy between the RBs and S1, based on the observed grain-orientation maps.

Grain Growth Texture Evolution in Zirconium (Zr702) and Commercially Pure Titanium (T40)

2004 ◽  
Vol 467-470 ◽  
pp. 441-446 ◽  
Author(s):  
Nathalie Bozzolo ◽  
N. Dewobroto ◽  
Thierry Grosdidier ◽  
Pierre Barbéris ◽  
Francis Wagner
Keyword(s):  
Grain Growth ◽  
Texture Evolution ◽  
Pure Titanium ◽  
Growth Conditions ◽  
Primary Recrystallization ◽  
Commercially Pure Titanium ◽  
High Annealing Temperature ◽  
Grain Sizes ◽  
High Annealing ◽  
Cold Rolled

Primary recrystallization of a 80% cold–rolled T40 or Zr702 sheets leads to equiaxed microstructures. Subsequently, only normal grain growth takes place in T40 while a few grains can grow abnormally after sufficient time at high annealing temperature (close to the transus) in Zr702. The grain sizes reached after extended grain growth at moderate temperatures in Zr702 are smaller than in T40. The presence of precipitates in Zr702 is probably responsible for this and also for the abnormal phenomena observed at high temperature in this material. The texture changes occurring in both materials under normal grain growth conditions (often roughly described as “30° rotation around c axes”) are due to the development of the largest grains produced by the primary recrystallization. These large grains are preferentially oriented around {j1=0°, F=30°, j2=30°} for T40 and around {j1=0°, F=25°, j2=30°} for Zr702, orientations which become predominant after extended grain growth.

Oriented Nucleation and Selective Growth during Secondary Recrystallization in Ultra Low Carbon Steels

2004 ◽  
Vol 467-470 ◽  
pp. 941-948 ◽  
Author(s):  
Kim Verbeken ◽  
Leo Kestens
Keyword(s):  
Grain Growth ◽  
Texture Evolution ◽  
Secondary Recrystallization ◽  
Low Carbon Steel ◽  
Primary Recrystallization ◽  
Carbon Steels ◽  
Abnormal Grain Growth ◽  
Selective Growth ◽  
Low Carbon ◽  
Ultra Low Carbon Steel

After primary recrystallization, on further annealing, abnormal grain growth occurred in ultra low carbon steel. Texture evolution was studied by comparing the orientations after complete secondary recrystallization, with on one hand the nuclei for abnormal grain growth and on the other hand the selective growth products of the primary recrystallized matrix. The influence of both mechanisms could be identified in the final texture.

scholarly journals Texture Evolution during Recrystallization and Grain Growth in Heavily Cold-rolled Fe-3%Si Alloy

2018 ◽  
Vol 58 (10) ◽  
pp. 1893-1900 ◽  
Author(s):  
Masato Yasuda ◽  
Takashi Kataoka ◽  
Yoshiyuki Ushigami ◽  
Kenichi Murakami ◽  
Kohsaku Ushioda
Keyword(s):  
Grain Growth ◽  
Texture Evolution ◽  
Cold Rolled

Grain Growth Behavior of a Rapidly Solidified Fe-10Cr-8A1 Alloy

1986 ◽  
Vol 80 ◽  
Author(s):  
M. J. Maloney ◽  
A. J. Garratt-Reed ◽  
G. J. Yurek
Keyword(s):  
Grain Growth ◽  
Hot Isostatic Pressing ◽  
Primary Recrystallization ◽  
Second Phase ◽  
Gas Atomization ◽  
Second Phase Particles ◽  
Cold Rolled ◽  
Grain Growth Behavior ◽  
Rapidly Solidified ◽  
Twin Roll

AbstractA rapidly solidified Fe-10Cr-8Al alloy that contained a dispersion of very fine MnS and Al203 particles was produced by a gas atomization/twin-roll quenching technique. The RS particulates were consolidated by hot isostatic pressing, and the consolidated alloy was hot forged, and then hot and cold rolled. Grain growth took place during primary recrystallization of the alloy; however, once primary recrystallization was complete, the dispersion of second phase particles was effective in pinning alloy grain boundaries.

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