Dynamic fracture toughness of heavy section, narrow gap, gas tungsten arc weldments
✍ Scribed by W.A. Logsdon
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 837 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0013-7944
No coin nor oath required. For personal study only.
✦ Synopsis
\bstract-Dynamic fracture toughness tests were performed on three, ASME SAS33 Gr A Cl 2 narrow gap, gas tungsten arc weldments (minimum yield strength equals 70 ksi. 485 MPa). Linear elastic f& results were obtained at low temperatures while J-integral techniques were utilized to evaluate dynamic fracture toughness over the transition and upper shelf temperature ranges. Loading rates in terms of K averaged 4.41 x lo4 ksiV'(in.)/sec (4.88 x IO" MPati/(m)/sec). Tensile, Charpy impact and drop weight nil ductility t~nsit~on (NDT) tests were also performed. The dynamic fracture toughness of both stress relieved (24 hr at lIZS"F, 6O?"C) plus quenched and tempered SA533 Gr A Cl 2 narrow gap, gas tungsten arc weldments: (a) easily transcended the ASME specified minimum reference toughness X;, curve, and (b) significantly exceeded the fracture toughness demonstrated by lower strength, stress relieved (313.5 hr at 112S"F, 607°F) SA533 Gr A Cl 2 automatic submerged arc weldments.