Microstructure-property relations in as-extruded ultrahigh-carbon steels
The microstructure and mechanical properties of as-extruded ultrahigh-carbon steels (UHCSs) are described. Extrusion ratios of 16:1 reduction were used at extrusion temperatures of 900 deg C, 1025 deg C, and 1150 deg C. Air cooling followed the extrusion process. The compositions of the four UHCSs i...
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| Veröffentlicht in: | Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Physical Metallurgy and Materials Science, 1999-06, Vol.30 (6), p.1559-1568 |
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| container_title | Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science |
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| creator | LESUER, D. R SYN, C. K WHITTENBERGER, J. D SHERBY, O. D |
| description | The microstructure and mechanical properties of as-extruded ultrahigh-carbon steels (UHCSs) are described. Extrusion ratios of 16:1 reduction were used at extrusion temperatures of 900 deg C, 1025 deg C, and 1150 deg C. Air cooling followed the extrusion process. The compositions of the four UHCSs investigated ranged from 1.2-1.8% C and contained either aluminum or silicon and/or chormium as the principal alloying elements. The as-extruded microstructures were predominantly pearlitic. Detailed examination of the microstructures allowed determination of the composition and extrusion temperature at which grain-boundary carbide networks and graphite can be avoided. It is shown that the yield strength of the as-extruded bars, for a given UHCS alloy composition, correlates well with the interlamellar spacing, independent of the extrusion temperature. Ultimate tensile strengths ranged from 1000-1690 MPa, and elongations to failure ranged from 3-12.5%. The present results indicate that single-step mechanical working of UHCSs to achieve fully pearlitic structures, with no postworking heat treatment, can lead to a new class of ultrahigh-strength steels. |
| doi_str_mv | 10.1007/s11661-999-0093-x |
| format | Article |
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R ; SYN, C. K ; WHITTENBERGER, J. D ; SHERBY, O. D</creator><creatorcontrib>LESUER, D. R ; SYN, C. K ; WHITTENBERGER, J. D ; SHERBY, O. D</creatorcontrib><description>The microstructure and mechanical properties of as-extruded ultrahigh-carbon steels (UHCSs) are described. Extrusion ratios of 16:1 reduction were used at extrusion temperatures of 900 deg C, 1025 deg C, and 1150 deg C. Air cooling followed the extrusion process. The compositions of the four UHCSs investigated ranged from 1.2-1.8% C and contained either aluminum or silicon and/or chormium as the principal alloying elements. The as-extruded microstructures were predominantly pearlitic. Detailed examination of the microstructures allowed determination of the composition and extrusion temperature at which grain-boundary carbide networks and graphite can be avoided. It is shown that the yield strength of the as-extruded bars, for a given UHCS alloy composition, correlates well with the interlamellar spacing, independent of the extrusion temperature. Ultimate tensile strengths ranged from 1000-1690 MPa, and elongations to failure ranged from 3-12.5%. The present results indicate that single-step mechanical working of UHCSs to achieve fully pearlitic structures, with no postworking heat treatment, can lead to a new class of ultrahigh-strength steels.</description><identifier>ISSN: 1073-5623</identifier><identifier>EISSN: 1543-1940</identifier><identifier>DOI: 10.1007/s11661-999-0093-x</identifier><identifier>CODEN: MMTAEB</identifier><language>eng</language><publisher>New York, NY: Springer</publisher><subject>Applied sciences ; AUSTENITE ; CARBIDES ; CARBON STEELS ; CHEMICAL COMPOSITION ; Cross-disciplinary physics: materials science; rheology ; Exact sciences and technology ; EXTRUSION ; Fatigue, corrosion fatigue, embrittlement, cracking, fracture and failure ; Fatigue, embrittlement, and fracture ; MATERIALS SCIENCE ; Metals. 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| subjects | Applied sciences AUSTENITE CARBIDES CARBON STEELS CHEMICAL COMPOSITION Cross-disciplinary physics: materials science rheology Exact sciences and technology EXTRUSION Fatigue, corrosion fatigue, embrittlement, cracking, fracture and failure Fatigue, embrittlement, and fracture MATERIALS SCIENCE Metals. Metallurgy MICROSTRUCTURE PEARLITE Physics TEMPERATURE DEPENDENCE TENSILE PROPERTIES Treatment of materials and its effects on microstructure and properties |
| title | Microstructure-property relations in as-extruded ultrahigh-carbon steels |
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