Holographic determination of the yield strength of a welded stainless steel pressure vessel

Technical Report · Wed Jul 14 04:00:00 EDT 1976

DOI:https://doi.org/10.2172/7353470· OSTI ID:7353470

Meyer, M. D.

The strength and toughness of a high energy rate formed (HERF'ed) stainless steel, as influenced by the heat input from a variety of welds, are being measured. Using holographic interferometry, a welded spherical pressure vessel constructed from HERF'ed stainless steel with a composition of 21 percent Cr, 6 percent Ni, 9 percent Mn, 0.23 percent N, balance Fe was examined. Holographic examination of the weld vicinity shows that plastic deformations in the heat affected zones reach a maximum at a distance of 5 mm on either side of the weld, and tails off for another 20 mm to zero strain. The yield and ultimate strengths of the heat affected zones, based on the thin wall relation and using the wall thickness just above the weld, is nearly that of the parent material. However, the mode of deformation indicates that if the heat affected zones were either of higher strength or narrower, the pressure vessel would be stronger. Several more vessels are being electron beam welded using different weld parameters, and these will be examined to determine how the strength of the vessel is affected.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7353470
• Report Number(s): UCID-17247
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CONTAINERS
CORROSION RESISTANT ALLOYS
DEFORMATION
ELECTRON BEAM WELDING
FABRICATION
HEAT AFFECTED ZONE
HOLOGRAPHY
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MECHANICAL PROPERTIES
PRESSURE VESSELS
STAINLESS STEELS
STEELS
WELDED JOINTS
WELDING
YIELD STRENGTH