Fabrication of Ni3Al thin foil by cold-rolling

Demura, Masahiko; Suga, Yozo; Umezawa, Osamu; Kishida, Kyosuke; George, E.P.; Hirano, Tôru

doi:10.1016/s0966-9795(00)00121-7

Cited by 60 publications

(65 citation statements)

References 24 publications

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“…We have found an interesting texture evolution with heat treatment in heavily cold-rolled Ni 3 Al single crystals [1]: disintegration from the cold-rolled texture by primary recrystallization and reintegration into the original, cold-rolled texture by grain growth. This phenomenon can be referred to as texture memory effect.…”

Section: Introductionmentioning

confidence: 89%

“…This number ratio is in fairly good agreement with the observed variant selectivity. Thus, in the heavily cold-rolled Ni 3 Al single crystals, the multiple twinning mechanism can explain the difference in the formation frequency among the eight variants. …”

Section: Recrystallization and Grain Growth IIImentioning

confidence: 95%

“…This phenomenon can be referred to as texture memory effect. Very recently, it turned out that the texture disintegrated by the primary recrystallization has 40˚ rotation relationship about <111> to the original, cold-rolled texture [2], leading to the assumption that 40˚<111> grain boundary (GB) has a high mobility in Ni 3 Al like fcc metals. Based on this assumption, the texture memory effect can be explained as follows.…”

Section: Introductionmentioning

confidence: 99%

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Nucleation Mechanism of 40˚<111> Rotated Grains during Recrystallization in Heavily Cold-Rolled Ni3Al Single Crystals

Demura

Kishida

et al. 2007

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Abstract. Primary recrystallization textures were examined in the 84% and 95% cold-rolled boron-free Ni 3 Al single crystals with a Goss texture using the electron backscatter diffraction method. It was found that the main components of the textures in the specimens heat-treated at 873K/0.5h had a 40˚ rotation relationship about <111> to the original, Goss texture. All the eight variants of 40˚<111> rotated grains existed. However, the number density is not even but dependent on whether the rotation axis is identical to the normal of slip planes activated during the prior cold rolling. The ratio of the number density among the variants was same in both the 84% and 95% cold-rolled foils. Based on these results, the formation of these 40˚<111> rotated grains was explained assuming the modified multiple twinning mechanism where the annealing twinning occurred at the activated slip planes, followed by the subsequent twinning.

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Section: Introductionmentioning

confidence: 89%

Section: Recrystallization and Grain Growth IIImentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Nucleation Mechanism of 40˚<111> Rotated Grains during Recrystallization in Heavily Cold-Rolled Ni3Al Single Crystals

Demura

Kishida

et al. 2007

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“…Our previous TEM observation revealed that each band had a single brass texture [11]. Thus, two kinds of bands, (110) [-112] and (110) [1][2][3][4][5][6][7][8][9][10][11][12], which were alternately located in the transverse direction, formed the dual Brass textures in total.…”

Section: Methodsmentioning

confidence: 99%

“…We have developed Ni 3 Al foils for high-temperature micro chemical devices [1][2][3][4][5][6]. For the application there are serious concerns about the brittleness in the foils, especially in the recrystallized state, since the polycrystalline Ni 3 Al is generally brittle due to the grain boundary (GB) fracture.…”

Section: Introductionmentioning

confidence: 99%

Texture Memory Effect in Heavily Cold-Rolled Ni3Al Single Crystals

Demura

Hirano

2007

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Abstract. The paper presented the texture evolution during primary recrystallization and following grain growth in the heavily cold-rolled Ni 3 Al 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.

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