Fatigue failure of a fillet welded nozzle joint

✍ Scribed by C.R Das; A.K Bhaduri; S.K Ray

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 563 KB
• Volume: 10
• Category: Article
• ISSN: 1350-6307
• DOI: 10.1016/s1350-6307(03)00062-1

✦ Synopsis

A fillet welded joint in a nozzle of a storage tank, made of AISI 304L stainless steel (SS), had failed very close to the weld fusion line during transportation. Visual examination of the weld showed deposition of excessive weld metal in the joint. Scanning electron microscope observation of the fracture surface revealed beach and ratchet marks on the fracture surfaces. The observation of in-situ metallography of the heat-affected zone (HAZ) anticipated sensitisation of the HAZ. Bending of the nozzle to 15 anticipated the final failure, which occurred due to overloading during transportation.