Determination of mechanical and fracture properties of laser beam welded steel joints

Journal Article · Tue Jun 01 04:00:00 EDT 1999 · Welding Journal

OSTI ID:355650

Cam, G; Kocak, M ^[1]; Erim, S; Yeni, C ^[2]

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1. GKSS Research Center, Geesthacht (Germany). Inst. of Materials Research
2. Dokuz Eyluel Univ., Izmir (Turkey). Mechanical Engineering Dept.

In the present work, two similar joints, namely, ferritic-ferritic and austenitic-austenitic and one dissimilar ferritic-austenitic joint were produced with a CO{sub 2} laser using 6-mm-thick steel plates. In addition to the testing of flat microtensile specimens, the mechanical properties were examined by microhardness survey and conventional transverse and round tensile specimens. The results of the microtensile specimens were compared with standard round tensile specimens, and this clearly showed the suitability of the microtensile specimen technique for such joints. The crack tip opening displacement (CTOD) tests were also performed to determine the fracture toughness of the LB welds using three-point bend specimens. The effect of strength heterogeneity (mismatching) across the weld joint and at the vicinity of the crack tip on the CTOD fracture toughness values was also discussed.

• OSTI ID: 355650
• Journal Information: Welding Journal, Journal Name: Welding Journal Journal Issue: 6 Vol. 78; ISSN 0043-2296; ISSN WEJUA3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON DIOXIDE LASERS
CRACK PROPAGATION
HEAT AFFECTED ZONE
LASER WELDING
MECHANICAL PROPERTIES
MECHANICAL TESTS
STEELS
WELDED JOINTS