On the Development of Copper Textures – Neutron Diffraction Control over a Period of 12 Years –

The longtime stability of copper textures has been periodically monitored over 12 years by neutron diffraction pole figure measurements on a cold rolled and a partially recrystallized copper specimen, always using the same diffractometer and the same procedure of data analysis. The texture component fractions of 'rolled' copper suffered a continuous decrease over about 8 years and seem to reverse since then. The decrease is accompanied by recrystallization from initial 3 to 34 vol. % at present. Texture changes in the partially recrystallized specimen are less pronounced. In this sample, the fraction of random orientations changed from initially 11 % to 31 % over the about first six years and followed by a decrease to 24 % at present.

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The development of the rolling texture in copper measured by neutron diffraction

Journal of Applied Crystallography ◽

10.1107/s0021889871007027 ◽

1971 ◽

Vol 4 (4) ◽

pp. 303-310 ◽

Cited By ~ 15

Author(s):

H. J. Bunge ◽

J. Tobisch ◽

W. Sonntag

Keyword(s):

Neutron Diffraction ◽

Texture Component ◽

Deformation Mechanism ◽

Three Dimensional ◽

Rolling Texture ◽

Orientation Distribution ◽

Distribution Functions ◽

Anisotropic Hardening ◽

Pole Figures ◽

Cold Rolled

Three-dimensional orientation distribution functions of the crystallites in copper sheets, cold rolled to different degrees of reduction, have been determined using neutron diffraction pole figures. The main features of the textures may be represented by the orientation `tube' already described in prior publications. Two ranges of rolling reduction can be distinguished, a lower one (30 to 50%) and a higher one (70 to 95%) the texture changes of which correspond to those calculated after the Taylor theory. In an intermediate range (50 to 70%) a different deformation mechanism occurs which leads to an intermediate (001) [110] texture component. It is supposed that anisotropic hardening may have occurred in this range.

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Energy Dispersive Diffractometry for Quantitative Texture Studies

Textures and Microstructures ◽

10.1155/tsm.12.243 ◽

1990 ◽

Vol 12 (4) ◽

pp. 243-247 ◽

Cited By ~ 2

Author(s):

J. A. Szpunar

Keyword(s):

Distribution Function ◽

Neutron Diffraction ◽

Pole Figure ◽

Orientation Distribution ◽

Energy Dispersive ◽

Rolled Steel ◽

Pole Figures ◽

Cold Rolled ◽

Expansion Coefficients

Energy dispersive diffractometry is becoming a useful tool for texture measurements. In this work we demonstrated that the intensity measured at points in four inverse pole figures for cold-rolled steel can be used to calculate the orientation distribution function (ODF) with an accuracy sufficient for the determination of about 12 series expansion coefficients. A pole figure generated from such a selective experiment agrees with the pole figure measured by neutron diffraction.

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Estimation of Residual Stress in Cold Rolled Iron-Disks Using Magnetic and Ultrasonic Methods and Neutron Diffraction Technique

MRS Proceedings ◽

10.1557/proc-376-415 ◽

1994 ◽

Vol 376 ◽

Cited By ~ 1

Author(s):

V.L. Aksenov ◽

A.M. Balagurov ◽

G.D Bokuchava ◽

J. Schreiber ◽

Yu.V. Taran Frank

Keyword(s):

Residual Stress ◽

Neutron Diffraction ◽

Sheet Metal ◽

Diffraction Method ◽

Calibration Procedure ◽

Rolled Sheet ◽

Forming Process ◽

Practical Applications ◽

Ultrasonic Methods ◽

Cold Rolled

ABSTRACTVariation of internal stress states in cold rolled sheet metal can essentially influence the result of forming processes. Therefore it is important to control the forming process by a practicable in line testing method. For this purpose magnetic and ultrasonic nondestructive methods are available. However, it is necessary to calibrate these techniques. This paper describes a first step of such a calibration procedure making use of the neutron diffraction method. On the basis of the diffraction results an assessment of the magnetic and ultrasonic methods for the estimation of residual stress in the cold rolled iron-disks was made. Reasonable measuring concepts for practical applications to forming processes with cold rolled sheet metal are discussed.

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Volume Texture of a Deformed Quartzite Observed With U-Stage Microscopy and Neutron Diffractometry

Textures and Microstructures ◽

10.1155/tsm.31.239 ◽

1999 ◽

Vol 31 (4) ◽

pp. 239-248 ◽

Cited By ~ 5

Author(s):

H. Ghildiyal ◽

E. Jansen ◽

A. Kirfel

Keyword(s):

Neutron Diffraction ◽

Pole Figure ◽

North West ◽

Pole Figures ◽

Slip Planes ◽

Subsequent Calculation ◽

Kaoko Belt ◽

Universal Stage ◽

Active Slip

The volume texture of a naturally deformed quartzite from the Kaoko belt, North-West Namibia, has been analysed by both universal stage microscopy and neutron diffraction. Universal stage microscopy is restricted to the determination of the base pinacoid preferred orientation in quartzite. For a more complete description of the texture, the orientations of additional crystal planes, such as first and second order prisms as well as positive and negative rhombs, must be known. Neutron methods allow the evaluation of pole figures of all Bragg reflecting planes, of which those of the first order prisms being considered to be the most active slip planes, are of particular interest. Drawbacks of neutron diffraction, i.e. the faking of an eventually absent inversion centre and lack of resolution, can be overcome by pole figure inversion and subsequent calculation of desired pole figures. Both, universal stage microscopy and neutron diffraction yield well comparable results, of course only with respect to the pole figure of the c-axis.

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