Effect of the notch location on the Charpy-V toughness results for robotic flux-cored arc welded multipass joints
Küçük Resim Yok
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Walter De Gruyter Gmbh
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the effect of the notch locations on the Charpy-V toughness values of the all-welded joint obtained using robotic flux-cored arc welding was investigated with respect to microstructures at the notch locations. Charpy impact tests were performed through the thickness with notch location at the centerline as well as off-set regions of the weld metal in addition to the microhardness measurements conducted. The detailed weld metal characterization was conducted using a stereo microscope, optical microscope, and scanning electron microscope at the same location where the Charpy tests and microhardness tests were performed. The sub-zero impact toughness test results indicated that the columnar weld metal regions exhibited low toughness values while the centerline microstructure consisting of mainly reheated regions displayed much higher toughness values even at the test temperature of -60 degrees C, satisfying the toughness requirement of the requested 47 J value. It is concluded that a small variation of the through-thickness notch position may result in different toughness values for the same weld metal. On this basis, the notching procedure of the Charpy-V samples for the multi-pass weld metal should be conducted with care and obtained results should be explained with respective notch position and microstructure.
Açıklama
Anahtar Kelimeler
All-Weld Metal, Flux-Cored Arc Welding, Mechanical Properties, Microstructural Characterization, Notch Position, Martensite-Austenite Constituents, Heat-Affected Zone, C-Mn, Mechanical-Properties, Impact Toughness, Acicular Ferrite, Steel, Metal, Strength, Microstructure
Kaynak
Materials Testing
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
64
Sayı
9
