Microstructure and mechanical properties of ultrafine grained C-Mn steels

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1. Verfasser: Song, Rongjie 1975- (VerfasserIn)
Format: Abschlussarbeit Buch
Sprache:English
Veröffentlicht: Aachen Shaker 2005
Schriftenreihe:Berichte aus der Werkstofftechnik
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Datensatz im Suchindex

DE-BY-TUM_call_number 0001 2005 A 9066
DE-BY-TUM_katkey 1528810
DE-BY-TUM_location Mag
DE-BY-TUM_media_number 040005989126
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adam_text BERICHTE AUS DER WERKSTOFFTECHNIK RONGJIE SONG MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ULTRAFINE GRAINED C-MN STEELS D 82 (DISS. RWTH AACHEN) SHAKER VERLAG AACHEN 2005 CONTENTS LIST OF SYMBOLS AND ABBREVIATIONS V 1 MOTIVATION FOR PRODUCING ULTRAFINE GRAINED STEELS 1 2 LITERATURE OVERVIEW OF ULTRAFINE GRAINED STEELS 3 2.1 FUNDAMENTALS OF IMPROVING MECHANICAL PROPERTIES BY GRAIN REFINE- MENT 3 2.2 RELATED INVESTIGATIONS ON ULTRAFINE GRAINED STEELS 6 2.2.1 METHODS OF PRODUCING ULTRAFINE GRAINED STEELS 6 2.2.1.1 SEVERE PLASTIC DEFORMATION 7 2.2.1.2 NOVEL THERMOMECHANICAL PROCESSING 13 2.2.2 MECHANICAL PROPERTIES OF ULTRAFINE GRAINED STEELS 16 2.2.2.1 TENSILE PROPERTIES 16 2.2.2.2 TOUGHNESS 20 2.3 CHALLENGES TO INDUSTRIELL PROSPECTS OF ULTRAFINE GRAINED STEELS ... 21 2.3.1 STRATEGIES TO INCREASE THE DUCTILITY 21 2.3.2 REALIZATION OF LARGE SCALE PRODUCTION 22 3 NEW CONTRIBUTIONS TO PRODUCTION AND CHARACTERIZATION OF ULTRA- FINE GRAINED STEELS 25 4 EXPERIMENTAL APPROACH 29 4.1 SAMPLE MATERIALS 29 4.2 LABORATORIAL EXPERIMENTS OF THE THERMOMECHANICAL PROCESSING ... 30 I CONTENTS 4.2.1 LABORATORIAL SIMULATION OF HOT AND WARM ROLLING 30 4.2.2 DETERMINATION OF DCCT-DIAGRAMS USING DEFORMATION DILATOMETRY 32 4.3 MICROSTRUCTURE OBSERVATION 33 4.3.1 LIGHT OPTICAL MICROSCOPY 34 4.3.2 SEM 34 4.3.3 TEM 35 4.4 MICROTEXTURE DETERMINATION USING EBSD 36 4.5 GRAIN SIZE MEASUREMENT 39 4.6 MEASUREMENT OF MECHANICAL PROPERTIES 39 4.6.1 HARDNESSTEST 39 4.6.2 TENSILETEST 40 4.6.3 CHARPY IMPACT TEST 40 5 CONTINUOUS-COOLING-TRANSFORMATION DIAGRAMS AFTER DEFORMATION OF C-MN STEELS 43 5.1 OPTIMIZATION OF AUSTENITE DEFORMATION TEMPERATURE 43 5.2 CONTINUOUS-COOLING-TRANSFORMATION DIAGRAMS AFTER DEFORMATION . . 45 5.2.1 EFFECT OF CHEMICAL COMPOSITION ON PHASE TRANSFORMATION . . 45 5.2.2 EFFECT OF COOLING RATE ON MICROSTRUCTURE 47 6 ULTRAFINE GRAINED STEELS PRODUCED BY WARM DEFORMATION 49 6.1 CONSIDERATIONS FOR SETTING UP EXPERIMENTAL PROCESSES 49 6.2 EXPERIMENTAL PROCEDURES TO PRODUCE ULTRAFINE GRAINED STEELS ... 51 6.2.1 WARM DEFORMATION OF A FERRITE-PEARLITE MICROSTRUCTURE ... 51 6.2.2 WARM DEFORMATION OF A BAINITIC MICROSTRUCTURE 52 6.3 EFFECTS ON MICROSTRUCTURE AND HARDNESS OF THE ULTRAFINE GRAINED STEELS 52 6.3.1 RESULTS 52 6.3.1.1 EFFECT OF TEMPERATURE ON MICROSTRUCTURE 52 6.3.1.2 EFFECT OF TEMPERATURE ON GRAIN BOUNDARY CHARAC- TER DISTRIBUTION 56 CONTENTS 6.3.1.3 EFFECT OF CARBON CONTENT ON GRAIN SIZE 58 6.3.1.4 EFFECT OF EXPERIMENTAL PROCEDURES ON GRAIN SIZE . 58 6.3.1.5 EFFECT OF TEMPERATURE ON HARDNESS 58 6.3.2 DISCUSSION 58 7 MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ULTRAFINE GRAINED STEELS 65 7.1 EXPERIMENTAL PROCEDURE FOR PROPERTIES INVESTIGATION OF ULTRAFINE GRAINED STEELS 65 7.2 RESULTS 68 7.2.1 MICROSTRUCTURE AND MECHANICAL PROPERTIES OF THE CONVEN- TIONAL STEELS 68 7.2.1.1 MICROSTRUCTURE 68 7.2.1.2 MECHANICAL PROPERTIES 68 7.2.2 MICROSTRUCTURE AND MECHANICAL PROPERTIES OF THE ULTRAFINE GRAINED STEELS 68 7.2.2.1 MICROSTRUCTURE 68 7.2.2.2 EFFECT OF MANGANESE ON GRAIN REFINEMENT 74 7.2.2.3 MECHANICAL PROPERTIES 80 7.2.3 COMPARISON OF PROPERTIES BETWEEN THE CONVENTIONAL AND UL- TRAFINE GRAINED STEELS 88 7.2.3.1 GRAIN SIZE 88 7.2.3.2 TENSILE PROPERTIES 88 7.2.3.3 TOUGHNESS 90 7.2.3.4 SUMMARY OF MECHANICAL PROPERTIES 98 7.2.4 MICROSTRUCTURE AND TEXTURE EVOLUTION DURING WARM DEFOR- MATION AND ANNEALING 99 7.3 DISCUSSION 107 7.3.1 FORMATION OF THE ULTRAFINE GRAINED STEELS DURING WARM DE- FORMATION AND ANNEALING 107 7.3.1.1 MICROSTRUCTURAL EVOLUTION OF FERRITE 107 IY CONTENTS 7.3.1.2 SPHEROIDIZATION OF LAMELLAR PEARLITE 109 7.3.1.3 DISTRIBUTION OF CEMENTITE PARTICLES 110 7.3.1.4 EFFECT OF CEMENTITE PARTICLES 111 7.3.2 TEXTURE EVOLUTION DURING ANNEALING OF A 0.2%C STEEL . ... 112 7.3.3 EFFECT OF CARBON AND MANGANESE ON GRAIN REFINEMENT . ... 113 7.3.3.1 CARBON 113 7.3.3.2 MANGANESE 114 7.3.4 MECHANICAL PROPERTIES OF THE ULTRAFINE GRAINED STEELS .... 117 7.3.4.1 TENSILE PROPERTIES 117 7.3.4.2 TOUGHNESS 119 7.3.4.3 EVIDENCE FOR OPTIMIZATION OF STRENGTH AND TOUGH- NESS IN THE ULTRAFINE GRAINED STEELS 122 7.3.5 EFFECT OF CARBON CONTENT ON WORK HARDENING RATE 123 7.3.6 HALL-PETCH RELATIONSHIP FOR ULTRAFINE GRAINED STEELS 125 SUMMARY 131
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author Song, Rongjie 1975-
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dewey-tens 620 - Engineering and allied operations
discipline Maschinenbau / Maschinenwesen
Bergbau / Hüttenwesen
Werkstoffwissenschaften / Fertigungstechnik
format Thesis
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physical VII, 148 S. Ill., graph. Darst. 21 cm, 245 gr.
publishDate 2005
publishDateSearch 2005
publishDateSort 2005
publisher Shaker
record_format marc
series2 Berichte aus der Werkstofftechnik
spellingShingle Song, Rongjie 1975-
Microstructure and mechanical properties of ultrafine grained C-Mn steels
Mechanische Eigenschaft (DE-588)4217961-0 gnd
Kohlenstoffstahl (DE-588)4164563-7 gnd
Manganstahl (DE-588)4168814-4 gnd
Nanostruktur (DE-588)4204530-7 gnd
subject_GND (DE-588)4217961-0
(DE-588)4164563-7
(DE-588)4168814-4
(DE-588)4204530-7
(DE-588)4113937-9
title Microstructure and mechanical properties of ultrafine grained C-Mn steels
title_auth Microstructure and mechanical properties of ultrafine grained C-Mn steels
title_exact_search Microstructure and mechanical properties of ultrafine grained C-Mn steels
title_full Microstructure and mechanical properties of ultrafine grained C-Mn steels Rongjie Song
title_fullStr Microstructure and mechanical properties of ultrafine grained C-Mn steels Rongjie Song
title_full_unstemmed Microstructure and mechanical properties of ultrafine grained C-Mn steels Rongjie Song
title_short Microstructure and mechanical properties of ultrafine grained C-Mn steels
title_sort microstructure and mechanical properties of ultrafine grained c mn steels
topic Mechanische Eigenschaft (DE-588)4217961-0 gnd
Kohlenstoffstahl (DE-588)4164563-7 gnd
Manganstahl (DE-588)4168814-4 gnd
Nanostruktur (DE-588)4204530-7 gnd
topic_facet Mechanische Eigenschaft
Kohlenstoffstahl
Manganstahl
Nanostruktur
Hochschulschrift
url http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014181308&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
work_keys_str_mv AT songrongjie microstructureandmechanicalpropertiesofultrafinegrainedcmnsteels