Effect of Cross Slips on Deformation Microstructure and Recrystallization in &lt; 111&gt; and &lt; 001&gt; Al Single Crystals

Tagami, Minoru; Kashihara, Koji; Okada, Tatsuya; Inoko, Fukuji

doi:10.2320/matertrans.42.2013

Cited by 17 publications

(44 citation statements)

References 13 publications

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“…29) Cross slip easily occurs when a crystal is deformed along h100i, while it rarely occurs when deformed along h111i. 30) Assuming that a {100} h001i single crystal is deformed in tension along the RD and compression along the ND, cross slips occur between two slip system pairs: one pair is a2 and d2, and the other b2 and c2. In highly strained specimens such as the 7-and 9-cycle processed specimens, cross slips occur in abundance in {100} h001i areas, keeping the balance of operations between the two slip system pairs.…”

Section: Discussionmentioning

confidence: 99%

Change in Crystal Orientations of a {100} &lang;001&rang; Pure Aluminum Single Crystal during Accumulative Roll Bonding

et al. 2011

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A {100} h001i pure aluminum single crystal specimen was deformed by accumulative roll bonding (ARB) up to 9 cycles (" eq ¼ 7:18) with lubrication. The 5-and 9-cycle processes developed weakened textures composed of {123} h634i and {112} h111i. The {100} h001i areas existed even after the 9th cycle. The area fraction of {100} h001i was almost the same as that of the 2-cycle processed specimen. The average area fraction of {100} h001i was 4.8%. The cross slips by primary slip pairs may play an important role in maintaining the {100} h001i area. In the 5-cycle processed specimen, {123} h634i bands were observed in not only the center layer but also the one-eighth thickness layers close to the specimen surfaces. After the 7th and 9th cycles, {112} h111i was observed to form by further crystal rotation from {123} h634i.

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Section: Discussionmentioning

confidence: 99%

Change in Crystal Orientations of a {100} &lang;001&rang; Pure Aluminum Single Crystal during Accumulative Roll Bonding

et al. 2011

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“…The possibility that such a combination acts as a RG nucleus was proposed for recrystallization in aluminum single crystals tensile-deformed along ͗001͘ direction at LNT and subsequently annealed. 10,13,14) In such single crystals, in addition to eight primary slip systems, activation of slip systems with Schmid factor of zero was induced by the local strain accumulation caused by the complete suppression of prominent cross-slip. The formation of RGs rotated about four ͗111͘ axes in both clockwise and counterclockwise directions with respect to the deformed matrix was geometrically explained by the combination of major and minor slip systems.…”

Section: Recrystallization Nucleusmentioning

confidence: 99%

Deformation and Recrystallization of Tensile-deformed or Rolled Fe-3%Si Alloy Single Crystals

et al. 2005

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Fe-3%Si alloy single crystal samples with various tensile directions were deformed to strains of 0.25 to 0.65 and subsequently annealed. Necking occurred and work-hardening was very small in all tensile-deformed samples. After annealing, no recrystallized grain was formed. Fe-3%Si alloy single crystal sample of {111}͗112͘ orientation was lightly rolled to 25 % and subsequently annealed. Many recrystallized grains were formed in the rolled sample. The orientation of recrystallized grains formed at the rolled surface was totally different from the orientation of those formed in the interior of the sample. These results are discussed based on the tendency for cross-slip and the dislocation network model for nucleus of recrystallized grain.KEY WORDS: Fe-3%Si alloy; single crystal; deformation; recrystallization.lationship between deformation and recrystallization is expected in BCC metal single crystals. One major objective of the present study is to investigate deformation and annealing behaviors of single crystals of Fe-3%Si alloy with various tensile orientations. The other objective is to study the recrystallization in uniformly deformed Fe-3%Si alloy single crystal of {111}͗112͘ orientation deformed by light rolling. Experimental ProcedureSingle crystal samples were spark-cut from a coarsegrained Fe-3%Si alloy polycrystal prepared by JFE Steel Co. Ltd. The dimension of the gauge portion of the samples for tensile deformation was 4 mmϫ12 mmϫ2 mm in width, length and thickness. Four samples were prepared for tensile deformation. The tensile directions of the samples are plotted in a stereographic triangle in Fig. 1. Sample No. 4 had the same {111}͗112͘ orientation as the one in the proceeding paper.17) These samples were tensile-deformed at the strain rate of 5.6ϫ10Ϫ5 to 1.4ϫ10 Ϫ4 s Ϫ1, to strains of 0.25 to 0.65. The dimension of the sample for rolling was 4 mmϫ46 mmϫ2 mm in width, length and thickness. The initial orientation of the rolled sample is presented in Fig. 2. The normal direction (ND) of the rolled surface and the rolled direction (RD) were [111] and [211], respectively. In order to obtain uniform deformation, relatively light rolling of 25 % was applied. The deformed microstructure was examined using a scanning electron microscope (SEM JEOL JSM-6400). Orientation change associated with deformation was determined from electron channeling patterns (ECPs) taken with the SEM.The annealing was conducted for the tensile-deformed samples at 1 173 to 1 273 K for 180 to 780 s. The rolled sample was annealed at 873 K for 720 s. After annealing, orientation of RGs was determined from their ECPs. For the rolled sample, the rolled surface was removed by 0.25 mm to observe the formation of RGs in the interior of the sample. Results Tensile-deformed SamplesNominal stress-strain curves for the four tensile-deformed samples are presented in Fig. 3. In all samples, necking started from the early stage of plastic deformation. After the neck formation, plastic deformation proceeded mainly in the neck portion. Hence, ...

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“…The orientation of seven RGs is related to that of the DB by rotation about the P3 axis. In other words, these RGs have a h111i-rotation relationship 5,8) with the DB. It has been reported that in aluminum single crystals tensile-deformed along h011i, 70% of the RGs formed in the SBSS have a h111i-rotation relationship with the SBSS or DM.…”

Section: Deformation Microstructure and Annealing Of Tem Samplementioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9] We can classify the crystal orientations into uniformly and non-uniformly deformed orientations based on the uniformity of the slip pattern on the sample surface. For example, the h001i, h112i and h111i directions are known as uniformly deformed tensile directions of face-centered-cubic metal single crystals.…”

Section: Introductionmentioning

confidence: 99%

Axial Compression and Post-Deformation Annealing of &lang;011&rang; Aluminum Single Crystal

et al. 2009

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In order to study the formation of deformation bands (DBs) and its relation to recrystallization, an aluminum single crystal was compressed along the h011i direction and subsequently annealed. In the present crystal, the four slip systems having the largest Schmid factors were on two slip planes that were symmetrically arranged with respect to the direction of observation. The overall deformation was consistent with the arrangement of these two major slip planes. In the central region of the observed surface, the major slip planes were activated to form a doubleslip pattern. On the other hand, at the corner regions, many DBs were formed. After annealing, recrystallization occurred in the regions containing the DBs. Recrystallized grains had a h111i-rotation relationship with the DBs. The experimental results were compared with those in tensile-deformed aluminum single crystals having the same crystallographic orientation.

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Effect of Cross Slips on Deformation Microstructure and Recrystallization in < 111> and < 001> Al Single Crystals

Cited by 17 publications

References 13 publications

Change in Crystal Orientations of a {100} &lang;001&rang; Pure Aluminum Single Crystal during Accumulative Roll Bonding

Change in Crystal Orientations of a {100} &lang;001&rang; Pure Aluminum Single Crystal during Accumulative Roll Bonding

Deformation and Recrystallization of Tensile-deformed or Rolled Fe-3%Si Alloy Single Crystals

Axial Compression and Post-Deformation Annealing of &lang;011&rang; Aluminum Single Crystal

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