• Title, Summary, Keyword: texture

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Development of Microstructure and Texture in Cold Rolled INCONEL690 (냉간압연된 인코넬 690에서 미세조직과 집합조직의 발달)

  • 안재평;표은종;허무영
    • Transactions of Materials Processing
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    • v.3 no.4
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    • pp.392-400
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    • 1994
  • The formation of preferred orientations in the cold rolling texture of the Inconel 690 sheets was studied by the x-ray texture measurements and TEM observations. The increasing {220} pole intensity in the plane normal at the higher reductions was related to the {110}<112> texture component. The rolling texture of the Inconel 690 was the pure metal type which could be described by {112}<111>, {123}<634> and {110}<112> orientations. The dislocation cells were found in the near {110}<112> oriented grains. The onset of deformation twins in the {112}<111> oriented grains caused the weakening of {112}<111> and the development of {552}<115> in the rolling texture.

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Deformation Behavior during Warm Rolling in AA3103 Sheet deformed by CCSS (CCSS 가공한 AA3103 판재에서 온간 압연 소성 거동)

  • Lee J. P.;Kang H. K.;Huh M. Y.;Park J. W.;Chung Y. H.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.215-217
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    • 2004
  • In order to obtain the initial starting sample having a random texture and fine grains, aluminum alloy 3103 sheets were repeatedly deformed by CCSS up to six passages and subsequently annealed at $300^{\circ}C$ for 1h. These samples were cold rolled at room temperature and also warm rolled at $250^{\circ}C$. Changes in rolling temperature gave rise to the different texture evolution. Warm rolling led to the pronounced texture gradients comprising the shear texture at the surface and the rolling texture at the sheet center. The formation of the rolling texture components, i.e., the ${\beta}$-fiber, was promoted by cold rolling than warm rolling.

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Specification and Implementation of Projective Texturing Node in X3D

  • Kim, In-Kwon;Jang, Ho-Wook;Yoo, Kwan-Hee;Ha, Jong-Sung
    • International Journal of Contents
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    • v.12 no.2
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    • pp.1-5
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    • 2016
  • Extensible 3D (X3D) is the ISO standard for defining 3D interactive web- and broadcast-based 3D content integrated with multimedia. With the advent of this integration of interactive 3D graphics into the web, users can easily produce 3D scenes within web contents. Even though there are diverse texture nodes in X3D, projective textures are not provided. We enable X3D to provide SingularProjectiveTexture and MultiProjectiveTexture nodes by materializing independent nodes of projector nodes for a singular projector and multi-projector. Our approach takes the creation of an independent projective texture node instead of Kamburelis's method, which requires inconvenient and duplicated specifications of two nodes, ImageTexture and Texture Coordinate.

Texture and Rolling Characteristics of AZ31 Magnesium Alloy (AZ31 마그네슘의 집합조직변화와 압연특성)

  • Akramov, S.;Kim, In-Soo
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.480-481
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    • 2008
  • The aim of this work is to compare the microstructure, the texture, of an AZ31 Mg alloy processed via cold rolling process. Initial AZ31 Mg alloy sheet samples with strong {0002} texture were cut along the angles of 12.5 and 25 degrees to normal direction (ND). These specimens were rolled in room temperature condition. The microstructure was characterized by optical microscopy and the texture was measured by X-ray diffraction.

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Effect of various cold rolling process on the evolution of texture and recrystallized grain size in AA 5052 sheet (AA 5052 판재의 집합조직 발달과 결정립 크기에 미치는 다양한 냉간압연 공정의 영향)

  • Lee, J.H.;Nah, J.J.;Huh, M.Y.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.408-410
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    • 2008
  • The evolution of texture and microstructure during recrystallization was tracked after different cold rolling of aluminum sheets. Texture of the sheet center were differentiated by different strain states due to prior deformation. The evolution of recrystallization texture was studied with the amount of shear applied during cold rolling. The final grain size after recrystallization annealing was varied due to the effective strain during deformation.

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The Variation of Texture in Planar isotropic Ni Electrodeposits (평명등방성 Ni 도금층의 집합조직의 변화)

  • 김인수;이세광
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.262-265
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    • 1998
  • Nickel Plating improves on the corrosion resistance of materials in acid and moisture environment. In this study, we investigated the surface morphology, XRD patterns and pole figures of the various types of Ni electrodeposits. The texture of Ni electrodeposits changed from <100> to <111> through <110> with increasing the temperature of electrolyte and the concentration of nickel ion. The texture of Ni electrodeposits changed from <100> to <100> after annealing. Also the <110> texture changed to the <√310> texture after annealing.

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Retrieval of Regular Texture Images based on Curvature (곡률에 기반한 규칙적인 질감 영상의 추출)

  • 지유상;정동석
    • Proceedings of the IEEK Conference
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    • pp.211-214
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    • 2000
  • In this paper, we propose a regular-texture image retrieval approach relating In curvature. Maximum curvature and minimum curvature are computed from the query and each regular-texture image in the database. Seven features are computed from curvature characterizing statistical properties of the corresponding image. Each regular-texture image in the database is then represented as the seven CM (curvature measurement)-features. Query comparison and matching can be done using the corresponding CM-features. Experimental results on Brodatz texture show that the proposed approach is effective.

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Inhomogeneous Rolling Texture of Multilayered Aluminum Sheet (다층압연된 알루미늄의 불균질압연집합조직)

  • Choi, Chang-Hee;Hong, Seung-Hyun;Kwon, Jae-Wook;Oh, Kyu-Hwan;Lee, Dong-Nyung
    • Transactions of Materials Processing
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    • v.4 no.4
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    • pp.353-364
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    • 1995
  • An inhomogeneous rolling texture of high purity aluminum has been observed by a multilayered rolling. The shear texture of (100)[110] component developed in the surface layer, and the copper type rolling texture developed in the middle and center layers. The through-thickness texture variation has been calculated by the full-constraint Taylor model combined with FEM. The calculated results are in good agreement with the measured data.

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Grain Growth and Texture Evolution of Mg: Phase Field Modeling (마그네슘의 결정립 성장과 집합조직: 상장모델 계산)

  • Kim, Dong-Uk;Cha, Pil-Ryung
    • Journal of Korean Powder Metallurgy Institute
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    • v.18 no.2
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    • pp.168-171
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    • 2011
  • We investigate grain growth behavior of poly-crystalline Mg sheet having strong basal fiber texture using phase field model for grain growth and micro-elasticity. Strong initial basal texture was maintained when external load was not imposed, but was weaken when external biaxial strain was imposed. Elastic interaction between elastic anisotropy of Mg grain and external load is the reason why texture evolution occurs.

Improvement of Mechanical Properties of Mg alloys through Control of Grain Size and Texture (결정립크기와 집합조직제어를 통한 마그네슘 합금의 기계적 성질 개선)

  • Kim, W.J.;Lee, J.B.;Kim, W.Y.;Jeong, H.G.;Park, J.D.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.57-58
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    • 2006
  • The effects of lowering ECAP temperature during ECAP process and Post-ECAP annealing on microstructure, texture and mechanical properties of the AZ31 alloys have been investigated in the present study. The as-extruded materials were ECAP processed to 2 passes at 553K prior to subsequent pressing up to 6 passes at 523K or 493K. When this method of lowering ECAP temperature during ECAP was used, the rods could be successfully deformed up to 6 passes without any surface cracking. Grain refinement during ECAP process at 553K might have helped the material to endure further straining at lower deformation temperatures probably by increasing the strain accommodation effect by grain boundary sliding, causing stress relaxation. Texture modification during ECAP has a great influence on the strength of Mg alloys because HCP metals have limited number of slip systems. As slip is most prone to take place on basal planes in Mg at room temperature, the rotation of high fraction of basal planes to the directions favorable for slip as in ECAP decreases the yield stress appreciably. The strength of AZ31 Mg alloys increases with decrease of grain size if the texture is constant though ECAP deformation history is different. A standard positive strength dependence on the grain size for Mg alloys with the similar texture (Fig. 1) supports that the softening of ECAPed Mg alloys (a negative slope) typically observed despite the significant grain refinement is due to the texture modification where the rotation of basal planes occurs towards the orientation for easier slip. It could be predicted that if the original fiber texture is restored after ECAP treatment yielding marked grain refinement, yield stress as high as 500 MPa will be obtained at the grain size of ${\sim}1{\mu}m$. Differential speed rolling (DSR) with a high speed ratio between the upper and lower rolls was applied to alter the microstructure and texture of the AZ31 sheets. Significant grain refinement took place during the rolling owing to introduction of large shear deformation. Grain size as small as $1.4{\mu}m$ could be obtained at 423K after DSR. There was a good correlation between the (0002) pole intensity and tensile elongation. This result indicates that tensile ductility improvement in the asymmetrically rolled AZ31 Mg alloys is closely related to the weakening of basal texture during DSR. Further basal texture weakening occurred during annealing after DSR. According to Hall-Petch relation shown in Fig. 1, the strength of the asymmetrically rolled AZ31 is lower than that of the symmetrically rolled one when compared at the same grain size. This result was attributed to weakening of fiber texture during DSR. The DSRed AZ31, however, shows higher strength than the ECAPed AZ31 where texture has been completely replaced by a new texture associated with high Schmid factors.

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