FABRICATION AND DEFORMATION OF TUNGSTEN SINGLE CRYSTALS. PART 1. EFFECT OF BILLET ROLLING PLANE AND ROLLING DIRECTION ON THE RECRYSTALLIZATION TEMPERATURE OF SHEET FROM TUNGSTEN SINGLE CRYSTALS. PART 2 RECRYSTALLIZATION OF WORKED SINGLE CRYSTALS OF TUNGSTEN.

1963 ◽  
Author(s):  
A. C. Walters ◽  
R. G. Rudness ◽  
M. Stern ◽  
N. G. Reuter ◽  
L. Raymond
Keyword(s):  
Single Crystals ◽  
Rolling Direction ◽  
Rolling Plane ◽  
Recrystallization Temperature

Cold-rolling of Ti-rich TiAl polysynthetically twinned crystals

1990 ◽  
Vol 5 (3) ◽  
pp. 484-487 ◽  
Author(s):  
S. R. Nishitani ◽  
M. H. Oh ◽  
A. Nakamura ◽  
T. Fujiwara ◽  
M. Yamaguchi
Keyword(s):  
Cold Rolling ◽  
Shear Deformation ◽  
Surface Texture ◽  
Room Temperature ◽  
Stoichiometric Composition ◽  
Rolling Direction ◽  
Rolling Plane ◽  
Total Reduction ◽  
Pole Figures

Polysynthetically twinned crystals of TiAl with a nearly stoichiometric composition have been grown and rolled at room temperature. The maximum total reduction in thickness which is attainable without fracture depends on lamellae orientation with respect to the rolling plane and rolling direction. When specimens are oriented such that shear deformation parallel to the lamellar planes is operative during rolling and its operation causes lengthening of specimens, such specimens can be rolled up to about 50% reduction in thickness. The (111) pole figures are determined for the surface of specimens rolled to several different amounts of reduction, and the formation of surface texture is briefly discussed.

scholarly journals Topographic Arrangement of Crystallite Orientations in Rolled Copper

Texture ◽  
1972 ◽  
Vol 1 (2) ◽  
pp. 99-109 ◽  
Author(s):  
R. Gotthardt ◽  
G. Hoschek ◽  
O. Reimold ◽  
F. Haessner
Keyword(s):  
Electron Microscopy ◽  
Surface Layer ◽  
Single Crystals ◽  
Cross Sections ◽  
Rolling Plane ◽  
Correlated Data ◽  
Formation Mechanisms ◽  
Polycrystalline Copper ◽  
Polycrystalline Structure ◽  
X Ray

In single and polycrystalline copper rolled to a reduction of 95 %, the topographic arrangements of crystallite orientations were determined over large areas by means of electron microscopy. Correlated data on orientation, diffraction site, and transmission pictures in three cross-sections perpendicular to the normal, rolling and transverse directions were obtained and evaluated. These results were complemented by X-ray studies of the texture. The rolled polycrystalline structure consists of roughly disc-shaped regions of uniform orientation which are fairly strongly misoriented with respect to each other. The planes of the discs lie paral.lel to the rolling plane. Within these regions of uniform orientation lie elongated subgrains extended in the longitudinal and transverse directions. In a surface layer of a few microns thickness the dryly rolled single crystals have essentially a (100)[011] texture. This is independent of the orientation of the interior of the material. The observed structures are discussed with respect to possible formation mechanisms.

Flow Stress Anisotropy - Effect of Microstructure and Texture in Aluminium and IF Steel

2005 ◽  
Vol 495-497 ◽  
pp. 1541-1546
Author(s):  
Z.J. Li ◽  
Grethe Winther ◽  
Niels Hansen
Keyword(s):  
Flow Stress ◽  
Rolling Direction ◽  
Rolling Plane ◽  
Strengthening Effect ◽  
If Steel ◽  
Tensile Direction ◽  
Stress Anisotropy ◽  
Commercial Purity Aluminium ◽  
Cold Rolled ◽  
Effect Of Microstructure

The effect of microstructure and texture on the flow stress anisotropy in aluminium and IF steel has been investigated. The samples are recrystallized commercial purity aluminium (AA1050) cold rolled to prestrains of 0.05, 0.11 and 0.2, and recrystallized IF steel cold rolled to a prestrain of 0.28. The flow stress anisotropy was measured by tensile testing of specimens cut along different directions in the rolling plane. Pronounced anisotropy was found in both materials in spite of weak textures. The yield stress increases with increasing angle between the tensile direction and the rolling direction at all prestrains. The effect of microstructure and texture on the flow stress anisotropy was modelled by incorporating into a full-constraint Taylor model the strengthening effect of dislocation boundaries. The modelling and experimental results agree well, leading to a discussion of effect of the microstructure and texture on the flow stress anisotropy.

Fabrication of A CU-AL-NI-MN Shape Memory Alloy

1991 ◽  
Vol 246 ◽  
Author(s):  
Ming H. Wu ◽  
S.L. Semiatin ◽  
L.M. Schetky
Keyword(s):  
Shape Memory ◽  
Recrystallization Texture ◽  
Rolling Direction ◽  
Rolling Process ◽  
Rolling Plane ◽  
Phase Region ◽  
Normal Direction ◽  
Β Phase ◽  
Memory Recovery ◽  
Hot Rolling Process

AbstractIn the development of an optimized hot rolling process for a Cu-Al-Ni-Mn sheet alloy, the effects of the recrystallization texture on ductility and shape memory recovery were examined. The texture of samples rolled in the β phase region (750 °C) was characterized by martensitic (128) poles along the normal direction and (0018) poles inclined 60° from the normal to the rolling direction. The texture of samples rolled in the α+β region (600 °C) was slightly stronger but less symmetric. The shape memory recovery was more or less isotropic in the rolling plane, independent of the rolling conditions. However, improved bend ductility of 9.5% was observed along the rolling direction in specimens rolled at 750 °C with a reduction per pass of 27%.

Local and Global Effects in Texture and Microstructure Observed after Channel-Die Compression of Copper Single Crystals and after Cross-Rolling of Copper Sheets

2005 ◽  
Vol 105 ◽  
pp. 321-326
Author(s):  
Jan Pospiech ◽  
Zdzislaw Jasieński ◽  
M. Ostafin ◽  
Robert A. Schwarzer
Keyword(s):  
Single Crystals ◽  
Deformation Process ◽  
Structural Characteristics ◽  
Rolling Direction ◽  
Local Analysis ◽  
Orientation Measurement ◽  
Individual Crystal ◽  
Copper Single Crystals ◽  
High Dynamics ◽  
Deformation Step

The change of the deformation path leads to destabilization of the substructure and affects the texture of the deformed metal. The observed changes of texture and microstructure are, as a rule, significant and their characteristics depend on the geometry of the deformation process. Previous investigations on copper (and copper alloy) samples after deformation by rolling and channel-die compression were based on X-ray pole figure measurements and on observations in the light microscope. Hereby only global texture and structural characteristics have been obtained. The present study is mainly based on measurements of individual crystal orientations performed by ACOM (Automated Crystal Orientation Measurement, “Automated EBSD”) in the SEM which enables a precise local analysis of the investigated phenomena. For the channel-die experiments, (1 1 2)[1 1 -1] and (1 1 2)[1 -1 0] oriented copper single crystals have been used. After pre-deformation, a second deformation step has been carried out in transverse direction. The {1 1 2}<1 1 0> orientations are destabilized by channel-die compression, and clusters of layers develop which are composed of complementary {1 1 0}<1 1 2> components. The deformation process in polycrystalline sheets after rotating the rolling direction leads again to a distinct disintegration of the microstructure and destabilization of the b fiber. This process of microstructure reorganization after pre-deformation is fast and of high dynamics.

scholarly journals Tensile Deformation and Fracture Behavior of API-5L X70 Line Pipe Steel

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 501
Author(s):  
Mikhail L. Lobanov ◽  
Vladislav A. Khotinov ◽  
Vladimir N. Urtsev ◽  
Sergey V. Danilov ◽  
Nikolay V. Urtsev ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Deformation ◽  
Electron Backscatter Diffraction ◽  
Hsla Steel ◽  
Rolling Direction ◽  
Rolling Plane ◽  
Steel Plates ◽  
Line Pipe ◽  
Pipeline Steels ◽  
Oil Pipeline

Thermo-mechanical controlled processing (TMCP) is employed to obtain the required level of mechanical properties of contemporary HSLA steel plates utilized for gas and oil pipeline production. The strength and crack resistance of pipeline steels are mainly determined by its microstructure and crystallographic texture. In this study, the influence of the structural and textural states of industrially produced API-5L X70-X80 pipeline steels on tensile mechanical properties was analyzed. TMCP routes with different hot rolling temperatures and cooling rates were employed. The texture of steel was assessed using the Taylor factor, which was calculated based on electron backscatter diffraction (EBSD). The decrease in rolling temperature resulted in the sharper texture characterized by {001} planes banding (cleavage planes in the bcc lattice) parallel to rolling direction. The tensile deformation behavior at the stage of necking was determined by the crystallographic and morphological texture of the material and demonstrated significant anisotropy. Rupture of all investigated samples was accompanied by the development of splitting on the fracture surface. The splitting was localized in the rolling plane similar to the splitting in standard Charpy tests of pipeline steels.

Rolling Anisotropy of Ni3Al Single Crystals

1986 ◽  
Vol 81 ◽  
Author(s):  
Katsuya Watanabe ◽  
Masaaki Fukuchi
Keyword(s):  
Slip System ◽  
Single Crystal ◽  
Single Crystals ◽  
Tensile Strain ◽  
Compressive Strain ◽  
Rolling Direction ◽  
Sheet Plane ◽  
Active Slip System ◽  
Active Slip

AbstractThe rolling anisotropy of Ni3Al single crystals was studied. A single crystal sheet in the (011) plane showed remarkable anisotropy. Rolling the sheet in the [100] direction was simple but was almost impossible in the [011] direction. Substantial anisotropy was not observed in the (111) and (001) sheets. The texture of the rolled (011) and (111) sheets were {011}<011>. It is concluded that the rolling anisotropy of single crystal sheets is determined by the presence of active slip system related to compressive strain normal to the sheet plane, and tensile strain parallel to the rolling direction.

Anisotropy in Cold Rolling of Single Crystalline Ni3-Al-Base Intermetallic Alloys

2005 ◽  
Vol 495-497 ◽  
pp. 737-742 ◽  
Author(s):  
Kyosuke Kishida ◽  
Masahiko Demura ◽  
Toshiyuki Hirano
Keyword(s):  
Cold Rolling ◽  
Single Crystals ◽  
Microstructure Evolution ◽  
Rolling Direction ◽  
Stacking Faults ◽  
Intermetallic Alloys ◽  
Shear Deformations ◽  
Planar Defects ◽  
Crystal Orientations ◽  
Initial Crystal

Texture and microstructure evolution during cold rolling of binary Ni3Al single crystals were studied as a function of the initial crystal orientations. Cold rolling behavior of the single crystals is strongly dependent on the initial crystal orientations, especially on the initial rolling direction (RD). Macroscopic texture evolutions for binary Ni3Al single crystals with the initial RD close to <001> are characterized as development of dual {110}<¯112> texture above 90% cold reduction and the banded structure formation. Microstructure observations reveal the extensive formation and accumulation of the planar defects including the stacking faults and the planes where the localized shear deformations occurs, which must be responsible for the observed anisotropic cold rolling behavior of Ni3Al single crystals.

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