Ferritic weldment of grain-refined ferritic steels for cryogenic service
Conference
·
· Adv. Cryog. Eng.; (United States)
OSTI ID:6009305
This paper reports the initial results of the development of a weld filler metal and multipass GTA welding process for grain-refined 9Ni steel. The weld filler metal was cast in 4.5-kg ingots of the nominal composition Fe-14Ni-O.2Ti-0.003B, homogenized, hot-rolled, and then swaged into wire of 1.6-mm diameter. The chemical compositions of the base and filler metal are tabulated and the test welding procedure is described. Among the tests that were conducted on the welds are x-ray diffraction analysis for the residual austenite content; the Charpy impact test at 77 and 4.2 K for the fracture toughness; and scanning electron fractography for the weld metal, the HAZ, and the base metal of 9Ni Charpy specimens broken at 4.2 K. The procedure for grain refinement is defined; the retained austenite volume fraction is calculated using the method proposed by Miller. The results indicate that it is possible to weld grain-refined 9Ni steel with a ferritic weld filler metal and retain good toughness at cryogenic liquid helium temperatures.
- Research Organization:
- University of California, Berkeley, CA
- OSTI ID:
- 6009305
- Report Number(s):
- CONF-810835-
- Conference Information:
- Journal Name: Adv. Cryog. Eng.; (United States) Journal Volume: 28
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ferritic weldment of grain-refined ferritic steels for cryogenic use
Development of ferritic weldments for grain-refined ferritic steels for 4. 2K service
Development of ferritic weldments for grain-refined ferritic steels for 4. 2K service
Conference
·
Sat Aug 01 00:00:00 EDT 1981
·
OSTI ID:5637100
Development of ferritic weldments for grain-refined ferritic steels for 4. 2K service
Thesis/Dissertation
·
Thu Dec 31 23:00:00 EST 1981
·
OSTI ID:6834351
Development of ferritic weldments for grain-refined ferritic steels for 4. 2K service
Technical Report
·
Sun Oct 31 23:00:00 EST 1982
·
OSTI ID:6436634
Related Subjects
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
BUILDING MATERIALS
CHARPY TEST
COHERENT SCATTERING
CRYOGENICS
DESTRUCTIVE TESTING
DIFFRACTION
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
FABRICATION
FERRITIC STEELS
FRACTURE PROPERTIES
GRAIN REFINEMENT
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MAGNETS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
SCATTERING
STEELS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
TESTING
WELDING
X-RAY DIFFRACTION
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
BUILDING MATERIALS
CHARPY TEST
COHERENT SCATTERING
CRYOGENICS
DESTRUCTIVE TESTING
DIFFRACTION
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
FABRICATION
FERRITIC STEELS
FRACTURE PROPERTIES
GRAIN REFINEMENT
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MAGNETS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
SCATTERING
STEELS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
TESTING
WELDING
X-RAY DIFFRACTION