Drawing of tungsten wires: microstructure, mechanical properties and longitudinal cracks:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Aachen
Shaker
2009
|
| Schriftenreihe: | Schriftenreihe Werkstoffwissenschaft und Werkstofftechnik
46 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | 157 S. Ill., graph. Darst. 21 cm, 245 gr. |
| ISBN: | 9783832280758 |
Internformat
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Datensatz im Suchindex
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|---|---|
| adam_text | CONTENTS
ACKNOWLEDGMENTS...............................................................................*....................................
1 ZUSAMMENFASSUNG 5
ABSTRACT.....................................................................................................................................
7
CONTENTS.....................................................................................................................................
9 1 INTRODUCTION 13 2 DRAWING OF TUNGSTEN WIRES 15 2.1 PROPERTIES OF
TUNGSTEN 15 2.2 CRYSTALLOGRAPHY OF TUNGSTEN 17 2.3 TUNGSTEN WIRES 18
2.3.1 DOPED (NON-SAG) TUNGSTEN 18 2.3.2 PROCESSING OF TUNGSTEN WIRES 19
2.3.3 SPLITS 20 2.4 MICROSTRUCTURE OF TUNGSTEN WIRES 21 2.4.1 GRAIN
ELONGATION 21 2.4.2 GRAIN CURLING 22 2.4.3 INFLUENCE OF THE
MICROSTRUCTURE ON THE DUCTILITY 23 2.5 INFLUENCE OFDRAWING PARAMETERS ON
THE RESIDUAL STRESSES 24 2.6 REDUCTION OF THE RESIDUAL STRESSES IN DRAWN
WIRES 27 3 MATERIAL CHARACTERIZATION ......................... ....
......................................................... 29 3.1
MATERIAL DESCRIPTION 29 3.2 MICROSTRUCTURAL ANALYSIS 29 3.2.1 SAMPLE
PREPARATION 29 3.2.2 MICROSTRUCTURE OF SWAGED AND DRAWN WIRES 30 3.2.3
MICROSTRUCTURE OF TEMPERED WIRES 33 3.2.4 SURFACE APPEARANCE 34 3.2.5
ANALYSIS OF A SPLIT 35 3.3 EBSD ANALYSIS 36 3.3. BIBLIOGRAFISCHE
INFORMATIONEN HTTP://D-NB.INFO/993546323 DIGITALISIERT DURCH JO CONTENTS
3.3.2 SAMPLE PREPARATION 37 3.3.3 BACKSCATTERED ELECTRON ANALYSIS OF A
SWAGED WIRE 38 3.3.4 BACKSCATTERED ELECTRON ANALYSIS OF A DRAWN WIRE 38
3.3.5 BACKSCATTERED ELECTRON ANALYSIS OF AN ANNEALED SWAGED WIRE 39
3.3.6 EBSD MAP OFA SWAGED WIRE 40 3.4 NEUTRON DIFFRACTION MEASUREMENTS
43 4 MECHANICAL TESTS AND ANALYSIS OF TBE TESTED SPECIMENS . .. .* 45
4.1 TENSILE TESTS ON TUNGSTEN WIRES WITH DIAMETERS ABOVE 1 MM 45 4.1.1
EXPERIMENTAL SETUP AND TEST MATRIX 45 4.1.2 RESULTS 48 4.1.3 ANALYSIS OF
THE FRACTURED SPECIMENS 51 4.2 TENSILE TESTS ON THIN TUNGSTEN WIRES 52
4.2.1 EXPERIMENTAL SETUP AND TEST MATRIX 53 4.2.2 RESULTS 56 4.2.3
ANALYSIS OF THE FRACTURED SPECIMENS 58 4.3 COMPRESSION TESTS 60 4.3.1
EXPERIMENTAL SETUP AND TEST MATRIX 60 4.3.2 RESULTS 63 4.3.3 ANALYSIS OF
THE COMPRESSED SPECIMENS 64 4.3.4 TEXTURE OFA COMPRESSED SPECIMEN 69 4.4
COMPRESSION TESTS ON 2.5 MM TEMPERED WIRES 70 4.5 TRANSVERSE COMPRESSION
TESTS ON FLATTENED CYLINDERS 71 4.5.1 EXPERIMENTAL SETUP AND TEST MATRIX
72 4.5.2 RESULTS 73 4.6 COMPRESSION TESTS AT ROOM TEMPERATURE 74 4.6.1
EXPERIMENTAL SETUP AND TEST MATRIX 74 4.6.2 RESULTS 75 4.6.3 ANALYSIS OF
THE TESTED SPECIMENS 76 4.7 EVALUATION OF THE EXPERIMENTAL RESULTS 77
4.7.1 ESTIMATION OF THE FRICTION COEFFICIENT FROM THE AMOUNT OF
BARRELLING 77 4.7.2 SYNOPSIS OF THE EXPERIMENTAL RESULTS 79 4.7.
CONTENTS H. 5 SIMULATION OF THE DRAWING PROCESS AND MINIMIZATION OF THE
MACROSCOPIC RESIDUAL
STRESSES.....................................................................................................................................
85 5.1 SETUP OF AN AXISYMMETRIC FINITE ELEMENT MODEL 85 5.1.1 FEM MODEL
85 5.1.2 SELECTION OF THE ELEMENT TYPE 86 5.1.3 INFLUENCE OF THE
MESHSIZE 88 5.1.4 INFLUENCE OF THE KINEMATIC HARDENING 89 5.2
OPTIMIZATION OF THE DRAWING DIE GEOMETRY 90 5.3 INFLUENCE OF
INTERMEDIATE BENDING OPERATIONS BETWEEN CONSECUTIVE DRAWING STEPS. 97
5.3.1 INTRODUCTION 97 5.3.2 3D FEM MODEL 99 5.3.3 VALIDATION OF THE
MODEL 102 5.3.4 INFLUENCE OF COILING ON THE RESIDUAL STRESSES 102 5.3.5
RESIDUAL STRESSES AFTER TWO DRAWING-COILING-SPRINGBACK SEQUENCES 103
5.3.6 INFLUENCE OF THE BENDING RADIUS 106 5.3.7 INFLUENCE OF TEMPERATURE
108 5.3.8 INFLUENCE OF THE BACKPULL 110 5.3.9 BEST SELECTION OF THE
BENDING PARAMETERS 110 5.3.10 INFLUENCE OF YOUNG S MODULUS 111 5.3.11
SUMMARY OF NEW WAYS TO REDUCE RESIDUAL STRESSES 112 6 MICROSTRUCTURE AND
TEXTURE EVOLUTION DURING THE DRAWING OF TUNGSTEN WIRES *.... 113 6.1
LITERATURE OVERVIEW 113 6.2 CONSTITUTIVE MODEIS 114 6.2.1 CRYSTAL
PLASTICITY MODEL 114 6.2.2 VISCO-PLASTIC SELF-CONSISTENT MODEL 115 6.3
SIMULATIONS USING VPSC 116 6.3.1 MODEL SETUP 116 6.3. Y2 CONTENTS 7
TEXTURE INDUCED TENSION-COMPRESSION ASYMMETRY OF DRAWN TUNGSTEN WIRES
130 7.1 LITERATURE OVERVIEW 130 7.2 SIMULATION RESULTS 130 7.2.1 MODEL
SETUP 130 7.2.2 UNIAXIAL LOADING OF DRAWN WIRES 131 7.2.3 COMPRESSION OF
WIRES WITH GREY AND WITH 011 TEXTURE 134 7.2.4 INFLUENCE OF LATENT
HARDENING 136 7.3 COMPARISON WITH EXPERIMENTAL TEXTURE MEASUREMENTS 137
8
DISCUSSION...............................................................................................
....................... 138 9 CONCIUSIONS AND FUTURE
SCOPE................ 142 9.1 CONCIUSIONS 142 9.2 FUTURE SCOPE 145
BIBLIOGRAPHY 147 CURRICULUM VITAE 159
|
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| author | Rodriguez Ripoll, Manel 1977- |
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| bvnumber | BV035624164 |
| classification_rvk | ZM 4640 ZM 8200 |
| ctrlnum | (OCoLC)319868864 (DE-599)DNB993546323 |
| dewey-full | 671.34 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 671 - Metalworking & primary metal products |
| dewey-raw | 671.34 |
| dewey-search | 671.34 |
| dewey-sort | 3671.34 |
| dewey-tens | 670 - Manufacturing |
| discipline | Werkstoffwissenschaften / Fertigungstechnik |
| format | Thesis Book |
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| indexdate | 2024-07-09T21:41:50Z |
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| isbn | 9783832280758 |
| language | English |
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| physical | 157 S. Ill., graph. Darst. 21 cm, 245 gr. |
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| spelling | Rodriguez Ripoll, Manel 1977- Verfasser (DE-588)137942141 aut Drawing of tungsten wires: microstructure, mechanical properties and longitudinal cracks Manel Rodriguez Ripoll Aachen Shaker 2009 157 S. Ill., graph. Darst. 21 cm, 245 gr. txt rdacontent n rdamedia nc rdacarrier Schriftenreihe Werkstoffwissenschaft und Werkstofftechnik 46 Zugl.: Karlsruhe, Univ., Diss., 2009 Wolframdraht (DE-588)4479621-3 gnd rswk-swf Drahtziehen (DE-588)4012892-1 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Wolframdraht (DE-588)4479621-3 s Drahtziehen (DE-588)4012892-1 s DE-604 Schriftenreihe Werkstoffwissenschaft und Werkstofftechnik 46 (DE-604)BV013280137 46 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=017679254&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Rodriguez Ripoll, Manel 1977- Drawing of tungsten wires: microstructure, mechanical properties and longitudinal cracks Schriftenreihe Werkstoffwissenschaft und Werkstofftechnik Wolframdraht (DE-588)4479621-3 gnd Drahtziehen (DE-588)4012892-1 gnd |
| subject_GND | (DE-588)4479621-3 (DE-588)4012892-1 (DE-588)4113937-9 |
| title | Drawing of tungsten wires: microstructure, mechanical properties and longitudinal cracks |
| title_auth | Drawing of tungsten wires: microstructure, mechanical properties and longitudinal cracks |
| title_exact_search | Drawing of tungsten wires: microstructure, mechanical properties and longitudinal cracks |
| title_full | Drawing of tungsten wires: microstructure, mechanical properties and longitudinal cracks Manel Rodriguez Ripoll |
| title_fullStr | Drawing of tungsten wires: microstructure, mechanical properties and longitudinal cracks Manel Rodriguez Ripoll |
| title_full_unstemmed | Drawing of tungsten wires: microstructure, mechanical properties and longitudinal cracks Manel Rodriguez Ripoll |
| title_short | Drawing of tungsten wires: microstructure, mechanical properties and longitudinal cracks |
| title_sort | drawing of tungsten wires microstructure mechanical properties and longitudinal cracks |
| topic | Wolframdraht (DE-588)4479621-3 gnd Drahtziehen (DE-588)4012892-1 gnd |
| topic_facet | Wolframdraht Drahtziehen Hochschulschrift |
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