Development of fine-grained carbide-particle hardened Hadfield manganese steels: Final report
Three Hadfield Manganese (HM) steels containing different carbon concentrations (1.2%C, 1.4%C and 1.7%C) were hot-and-warm worked (HWW). The microstructures developed consist of relatively fine austenite grains (<10 ..mu..m) with spheroidized carbides. The hot-and-warm worked HM steels were then tested in torsion at intermediate and high temperatures (500 to 950/degree/C). Ductility, flow stress, stress-strain relations, and microstructural changes were analyzed as a function of temperature, strain rate, and carbon concentration. The principal factors affecting the torsional ductility of the HM steels were the flow stress during deformation, the temperature, and the carbon content. At intermediate flow stresses, the expected trend of ductility decrease with an increase in flow stress was observed. At low stresses, and high temperatures, however, the ductility was lower than expected due to decarburization. At high stresses, and low temperatures, the ductility was higher than expected due to strain-enhanced transformation to pearlite-spheroidite structures. 8 refs., 19 figs., 2 tabs.
- Research Organization:
- Stanford Univ., CA (USA). Dept. of Materials Science and Engineering; Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5029678
- Report Number(s):
- UCRL-21036; ON: DE88008919
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON STEELS
DUCTILITY
MECHANICAL PROPERTIES
MANGANESE STEELS
DECARBURIZATION
DEFORMATION
FAILURES
FLOW STRESS
FRACTURE PROPERTIES
HIGH TEMPERATURE
MICROSTRUCTURE
PROGRESS REPORT
STRAIN RATE
THERMAL CYCLING
TORSION
VERY HIGH TEMPERATURE
ALLOYS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DOCUMENT TYPES
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
STEELS
STRESSES
TENSILE PROPERTIES
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies