Microstructural evolution and precipitation behavior in heat affected zone of Inconel 625 and AISI 904L dissimilar welds

14th International Conference on Science, Engineering and Technology

自然科学;工业技术

Prabu, S Senthur^1 ; Ramkumar, K Devendranath^1 ; Arivazhagan, N.^1

School of Mechanical Engineering, VIT University, Vellore, Tamil Nadu

632014, India^1

关键词: Dissimilar weld;    Gas tungsten arc;    Inconel 625;    Metallurgical properties;    Precipitation behavior;    Secondary phasis;    Super-austenitic stainless steels;    Welding process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/263/6/062073/pdf
DOI  :  10.1088/1757-899X/263/6/062073

来源: IOP

【 摘 要 】

In the present investigation an attempt has been made to join the dissimilar combination of Inconel 625 super alloy and super austenitic stainless steel (AISI 904L) using manual multi-pass continuous current gas tungsten arc (CCGTA) welding processes. Two different filler wires such as ERNiCrMo-4 and ERNiCrCoMo-1 have been used to compare the metallurgical properties of these welded joints. Both optical microscopy and scanning electron microscopy techniques were adopted to disseminate the microstructure traits of these weldments. Formation of secondary phases at the HAZ and weld interface of AISI 904L was witnessed while using the ERNiCrCoMo-1 filler, along with Solidification Grain Boundary (SGB) and Migrated Grain Boundary (MGB) were also observed at the weld zone.