Texturen metallischer Werkstoffe

Wassermann, Günter; Grewen, Johanna

doi:10.1007/978-3-662-13128-2

Cited by 454 publications

(189 citation statements)

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“…This provides a control on the texture homogeneity of the sample texture and/or improves the measuring statistics, especially for coarse-grained samples, by accumulating several pole-figure measurements into a bulk pole figure. A standard pole-figure measuring grid of 5° × 5° was applied for quartz (100), (101), (110)(<a> axis), (102), (111), (200), (201), (112), (211), and for background measurement. After subtraction of the background from the quartz measurements, a defocusing correction based on functions derived from pole figure measurements of quartz powder (e.g., Wassermann & Grewen 1962, Wenk 1985 was carried out. At high tilt angles, reasonable defocusing corrections are not possible, therefore measurements were cut off at a tilt angle of 85°, leading to incomplete pole-figures.…”

Section: X-ray Texture Goniometrymentioning

confidence: 99%

Tertiary Pegmatite Dikes of the Central Alps

Guastoni¹,

Pennacchioni²,

Pozzi³

et al. 2014

Can Mineral

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbSTRACTThe largest field of Alpine Oligocene pegmatite dikes is in the Central Alps within the Southern Steep Belt (SSB) of the Alpine nappes; it extends for about 100 km in an E-W direction and 15 km in a N-S direction north of the Periadriatic Fault, from the Bergell pluton (to the east) to the Ossola valley (to the west). The pegmatite field geographically overlaps (1) the highest temperature domain of the Lepontine Barrovian metamorphic dome and (2) the zone of Alpine migmatization. We have studied pegmatites in two areas: (1) the Codera area on the western border of the Bergell pluton and (2) the Bodengo area between the Mera and the Mesolcina valleys. Most pegmatites show a simple mineral assemblage consisting of K-feldspar, quartz, and muscovite ± biotite, and only a minor percentage of the dikes (< 5%) contains Sn-Nb-Ta-Y-REE-U oxide, Y-REE phosphate, Mn-Fe-phosphate, Ti-Zr-silicate, Be-Y-REE-U-silicate and oxide minerals (beryl, chrysoberyl, bertrandite, bavenite, and milarite), garnet (almandine-spessartine), tourmaline (schorl to rare elbaite), bismuthinite, magnetite, and rarely dumortierite and helvite. The mineral assemblages, geological context, and chemical compositions allow the distinction between LCT (lithium, cesium, tantalum) and mixed LCT-NYF (niobium, yttrium, fluorine) pegmatites (with only one exception of an NYF dike in the Bodengo area). The LCT pegmatites of the Central Alps did not reach a high degree of geochemical evolution. The most fractionated pegmatites are found in the Codera area and contain Mn-rich elbaite, triplite, pink-beryl, and Cs-Rb-rich feldspar. In the Bodengo area pegmatites locally contain miarolitic cavities and the most evolved pegmatites correspond to the berylcolumbite-phosphate type. From a structural point of view two main types of pegmatites can be distinguished: (1) pegmatites that were involved in ductile deformation and (2) pegmatites that postdated the main ductile deformation of the SSB. Many pegmatites of the Codera valley belong to the first structural type: they were emplaced at relatively high ambient temperature (ca. 500 °C) and locally show a pervasive recrystallization of quartz and a mylonitic structure. The Codera dikes trend about 70° and are steeply dipping. In the Bodengo area the main set of pegmatites (trending approximately N-S to NNE-SSW) crosscuts the ductile deformation structures of the SSB, but the area also includes an earlier generation of boudinaged and folded pegmatite dikes. The undeformed ...

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Section: X-ray Texture Goniometrymentioning

confidence: 99%

Tertiary Pegmatite Dikes of the Central Alps

Guastoni¹,

Pennacchioni²,

Pozzi³

et al. 2014

Can Mineral

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“…The uniaxial deformation applied here leads to a pronounced increase of the <111 >-texture in load direction. This is a well-known effect for fcc-materials [12]. Because VL (vT) in <111>-direction is larger (smaller) compared to the isotropic case, the behavior of VL and vT parallel to the load direction is readily explained in terms of texture.…”

Section: Plastic Deformationmentioning

confidence: 92%

The Influence of High-Temperature Creep on the Ultrasonic Velocity in Alloy 800H

Willems

1987

Review of Progress in Quantitative Nondestructive Evaluation

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“…From the contributions of these and other authors, which were summarized by Wassermann (1939) und Wassermann and Grewen (1962) (1933), it was also shown that the crystallite orientations near the surface cannot be described in terms of fibre textures. During the last two decades particularly the pass-rolling of steel rods and wires on hot-working conditions became more and more important.…”

Section: Introductionmentioning

confidence: 95%

Texture Changes in Pass‐Rolling of Steel Rods

Schubert¹,

Klimanek²,

Hensger³

1988

Texture, Stress, and Microstructure

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Dedicated to the memory of Professor Giinter WassermannNeutron-diffraction was used to study the texture development during pass-rolling of rods of an austenitic (f.c.c.) steel X8CrNiTil8.10 and a ferritic (b.c.c.) material X8CrTil7 in a round---oval---round---oval---round groove sequence. The orientation distributions occurring in the core of the pass-rolled rods can be described in a good approximation in terms of orthorhombic sample symmetry and qualitatively interpreted either as press textures on conditions of anisotropic material flow in the plane perpendicular to the press direction or as rolling textures on condition of large spreading. However, though they must be characterized by components {hkl}(uvw) the pass-rolling textures are not rolling textures in the usual sense.

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Texturen metallischer Werkstoffe

Abstract: Alle Rechte, insbesondere das der "Obersetzung in fremde Spracheu, vorbehalten Ohne ausdrtlckllche Genehmlgung des Verlages ist es auch nlcht gestattet, dieses Buch oder Teile daraus au! photomechanlschem Wege (Photokople, Mlkrokopie) oder auf andere Art zu vervlelfiltigen

Cited by 454 publications

References 0 publications

Tertiary Pegmatite Dikes of the Central Alps

Tertiary Pegmatite Dikes of the Central Alps

The Influence of High-Temperature Creep on the Ultrasonic Velocity in Alloy 800H

Texture Changes in Pass‐Rolling of Steel Rods

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