Structural relationships of metallurgical and mechanical properties influenced by Ni-based fillers on Gas Tungsten Arc Welded Ferritic /Austenitic SS dissimilar joints

Abstract

Gas Tungsten Arc Welding process using ERNiCrMo-3 filler metal. It is commonly used in nuclear industries where the weldments are usually subjected to hot corrosion. Devendranath Ramkumar et al. (2015) proposed that weldment between Inconel 718 and AISI 430, using Gas Tungsten Arc Welding obtained from ER2553 and ERNiCrMo-4 fillers and that suggested and brought into the base metals for accumulate numerous benefits in terms of metallurgical and mechanical properties for aerospace and nuclear sectors. Devendranath Ramkumar et al. (2015) studied and reported about corrosion behavior of AISI 316L welds was investigated under 3.5% NaCl environment using Pulsed Current Gas Tungsten Arc Welding employed from two different fillers ER2553 and ERNiCr-3. It was fulfilled from the study that ERNiCr-3 exhibited better mechanical and corrosion properties and could be adopted to achieve optimal properties compared to over-alloyed filler.

Microstructure, Residual Stresses, and Strain-Rate-Dependent Deformation and Fracture Behavior of AISI 304L Joints Brazed with NiCrSiB Filler Metals

“…For example, ST20 15min showed 2 ± 0.5 J/cm 2 of impact toughness, which is extremely low. It is known that toughness is the weak place for joints, both welded and brazed [48]. However, specimens ST07 40min and ST15 40min showed high impact toughness-86 ±3 J/cm 2 and 90 ± 2 J/cm 2 , respectively-and the best UTS values: about 629 ± 9 MPa for the low-strainrate tests and 700 ± 5 MPa for the high-strain-rate tests.…”