4.6 Article

Microstructure and hardness studies of electron beam welded Inconel 625 and stainless steel 304L

Journal

VACUUM
Volume 110, Issue -, Pages 121-126

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2014.08.016

Keywords

Inconel 625; SS 304L; Electron beam welding (EBW); Fusion zone; Scanning electron microscopy (SEM)

Funding

  1. Higher Education Commission (HEC) Pakistan

Ask authors/readers for more resources

In this study, electron beam welding of dissimilar Inconel 625 and SS 304L alloys was successfully performed by employing optimized electron beam welding parameters. The welded joint was characterized using SEM/EDS, XRD and micro-hardness tester. The welded joint was found homogeneous, well bonded and defect free. Two types of microstructure i.e. columnar dendritic and cellular dendritic were observed in the fusion zone. The development of different microstructures in the fusion zone was attributed to the localized cooling effects during solidification. Few micro-cracks along with dendrites splitting were observed in the vicinity of end crater that was mainly due to the segregation of S element. A significant variation of Ni and Fe was observed across Inconel/FZ and FZ/SS interfaces due to their fast diffusion in the melt pool. Micro-hardness measurements across Inconel/FZ and FZ/SS interfaces showed an increasing trend in the FZ from SS 304L towards Inconel base alloy. 2014 Elsevier Ltd. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available