Mechanical Properties and Physical Metallurgy of HSLA steel laser Beam Weldments
Abstract:
Laser beam weldments of High Strength Low Alloy (HSLA) Steels, (12 mm (0.5 in.) thick), were fabricated as autogeneous butt welds and with 0.025 mm (0.001 in.) thick Inconel 600 inserts. Their mechanical properties, solidification structure, and microstructure were evaluated. The HSLA steels examined were ASTM A633, A710, A736, and A737. The mechanical properties (YS, UTS, Elong., RA, and Fracture Toughness) of the base plates and weldments were measured. The fracture toughness was determined by the Charpy V notch test. Hardness traverses were made across the base plates, heat affected and fusion zones. The solidification structure and microstructure of the autogeneous and Inconel 600 insert welds were identified by optical microscopy. Fractographic analysis was carried out by scanning electron microscopy. A discussion of the differences in structures and mechanical properties of the weldments will be presented.
Keywords:
HSLA steel, welding.
Author:
P. E. Denney and E.A. Metzbower
Affiiation
U.S. Naval Research Laboratory, Washington, DC 20375.
PDF:
Source:
Vanadium Structural Steels - Reprint of papers on vanadium steel from the proceedings of “ASM HSLA Steels Technology and Applications Conference, Philadelphia, USA, Oct., 1983, pp.267-274
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