Evaluating thermo-mechanical processing as a tool in improving the weldment mechanical behavior
Conference
·
· TMS (The Metallurgical Society) Paper Selection; (USA)
OSTI ID:5366816
- Univ. of Cincinnati, OH (USA)
The weld metal grain refinement through recrystallization by post-weld thermo-mechanical processing (TMP) of the weldment (a composite of weld metal, base metal and HAZ) was found feasible from an earlier study for a type AISI 316 austenitic stainless steel Gas Tungsten Arc weldment. The room temperature microhardness studies on TMP weldments indicated a better compatibility between base and weld metal mechanical properties. The thermo-mechanical processing involved an optimum amount of cold work (determined by trail and error) and heat treating the weldment at solutionizing temperature. The presence of as-solidified stable dislocation microstructure (sub-boundaries) in the weld metal makes it susceptible to recrystallization with the above processing, without affecting the surrounding base metal grain structure. Microhardness measurements and tensile tests were done on the TMP weldments at different temperatures to evaluate the time-independent weldment mechanical behavior and to compare this information to the as-welded weldment properties.
- OSTI ID:
- 5366816
- Report Number(s):
- CONF-840909--
- Conference Information:
- Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Journal Volume: 56
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ARC WELDING
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CHROMIUM-NICKEL-MOLYBDENUM STEELS
CORRELATIONS
CORROSION RESISTANT ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
FABRICATION
HARDNESS
HEAT AFFECTED ZONE
HEAT RESIS
HEAT TREATMENTS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
LINE DEFECTS
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROHARDNESS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
OPTIMIZATION
RECRYSTALLIZATION
STAINLESS STEEL-316
STAINLESS STEELS
STEEL-CR17NI12MO3
STEELS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
THERMOMECHANICAL TREATMENTS
WELDED JOINTS
WELDING
ZONES
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ARC WELDING
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CHROMIUM-NICKEL-MOLYBDENUM STEELS
CORRELATIONS
CORROSION RESISTANT ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
FABRICATION
HARDNESS
HEAT AFFECTED ZONE
HEAT RESIS
HEAT TREATMENTS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
LINE DEFECTS
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROHARDNESS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
OPTIMIZATION
RECRYSTALLIZATION
STAINLESS STEEL-316
STAINLESS STEELS
STEEL-CR17NI12MO3
STEELS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
THERMOMECHANICAL TREATMENTS
WELDED JOINTS
WELDING
ZONES