Residual Stresses Measured In Quenched HSLA-100 Steel Plate.

Conference · Sat Jan 01 04:00:00 EST 2005

OSTI ID:977953

Prime, M B ^[1]

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1. Michael B.

Residual stresses over the cross section of a 60.75 mm thick plate of HSLA-100 steel were measured using the contour method. HSLA-100 is a low carbon, copper precipitation hardened, High-Strength Low-Alloy steel used for naval ship hulls, armor, and containment vessels. The material was prepared by hot cross-rolling, Austenitizing at 900 C for 75 minutes and water quenching, and then tempering at 660 C for 200 minutes followed by another water quench. A cross-sectional map of residual stresses was measured using the contour method: (1) the specimen was carefully cut in two using wire electric discharge machining; (2) the contour of the cut surfaces were measured by using a Coordinate Measuring Machine; and (3) the residual stresses were determined from the measured contours using a 3-D elastic finite element (FE) model. The results showed a typical quenching stress distribution with peak compressive stress of about 165 MPa a few mm below the surface and tensile stress of 200 MPa in the center of the plate thickness. The stress magnitudes, at less than 30% of yield, are somewhat low for water-quenched steels, which is discussed. An FE analysis showed that edge effects in the measured stress map were shown to be consistent with relaxation from removing the test specimen from a larger plate.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 977953
• Report Number(s): LA-UR-05-1265
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ARMOR
CARBON
CONTAINMENT
COPPER
CROSS SECTIONS
DISTRIBUTION
ELECTRIC DISCHARGES
LOW ALLOY STEELS
MACHINING
PLATES
PRECIPITATION
QUENCHING
RELAXATION
RESIDUAL STRESSES
STEELS
TEMPERING
THICKNESS
WATER