Determination of mechanical and fracture properties of laser beam welded steel joints
- GKSS Research Center, Geesthacht (Germany). Inst. of Materials Research
- 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, Vol. 78, Issue 6; Other Information: PBD: Jun 1999
- Country of Publication:
- United States
- Language:
- English
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