Improvement of cryogenic mechanical properties of Fe-12 Mn and Fe-8 Mn alloy steels through thermal/mechanical treatments. [Fe 12 Mn Steel and Fe-8 Mn Steel]
Journal Article
·
· Metall. Trans., A; (United States)
An ivestigation has been made to improve the low temperature mechanical properties of Fe-8Mn and Fe-12Mn-0.2 Ti alloy steels. A reversion annealing heat treatment in the two-phase (..cap alpha.. + ..gamma..) region following cold working has been identified as an effective treatment. In an Fe-12Mn-0.2Ti alloy a promising combination of low temperature (-196/sup 0/C) fracture toughness and yield strength was obtained by this method. The improvement of properties was attributed to the refinement of grain size and to the introducion of a uniform distribution of retained austenite (..gamma..). It was also shown that an Fe-8Mn steel could be grain-refined by a purely thermal treatment because of its dislocated ..cap alpha..' martensitic structure and absence of epsilon martensite. As a result, a significant reduction of ductile to brittle transition temperature was obtained.
- Research Organization:
- Univ. of California, Berkely
- OSTI ID:
- 6121668
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 10A:5; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360103* -- Metals & Alloys-- Mechanical Properties
420201 -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
ANNEALING
BRITTLENESS
CHARPY TEST
COOLING
CRYOGENICS
CRYSTAL-PHASE TRANSFORMATIONS
DUCTILITY
ENERGY
FRACTURE PROPERTIES
HEAT
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
MECHANICAL PROPERTIES
PHASE TRANSFORMATIONS
PROCESSING
QUENCHING
REFINING
STEELS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TITANIUM ADDITIONS
TITANIUM ALLOYS
360101 -- Metals & Alloys-- Preparation & Fabrication
360103* -- Metals & Alloys-- Mechanical Properties
420201 -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
ANNEALING
BRITTLENESS
CHARPY TEST
COOLING
CRYOGENICS
CRYSTAL-PHASE TRANSFORMATIONS
DUCTILITY
ENERGY
FRACTURE PROPERTIES
HEAT
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
MECHANICAL PROPERTIES
PHASE TRANSFORMATIONS
PROCESSING
QUENCHING
REFINING
STEELS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TITANIUM ADDITIONS
TITANIUM ALLOYS