| Issue |
MATEC Web Conf.
Volume 188, 2018
5th International Conference of Engineering Against Failure (ICEAF-V 2018)
|
|
|---|---|---|
| Article Number | 02018 | |
| Number of page(s) | 7 | |
| Section | Metallic Materials I: Characterization, Fatigue, Fracture and Fracture Mechanisms | |
| DOI | https://doi.org/10.1051/matecconf/201818802018 | |
| Published online | 07 August 2018 | |
A Fractographical Study on Dissimilar Weld Joints of SAF 2205 and Hastelloy C-276
1
Kocaeli University, Department of Metallurgical and Materials Engineering,
Kocaeli,
Turkey
2
Kocaeli University, Program of Welding Technology,
Kocaeli - Turkey
3
Anadolu Casting Co.,
Kocaeli - Turkey
* Corresponding author: celikkolemrullah@gmail.com
In this study, a dissimilar weld joint between SAF 2205 and Hastelloy C-276 was manufactured by using gas tungsten arc welding and its notched impact fracture behaviour was investigated. Initially, V-type welding mouth was opened and the welding was performed by multi-pass. In welding procedure, ERNiCrMo-3 material used as a filler metal and the heat input was varied between 0.48-1.10 kJ/mm depending on welding parameters. Both welding pool and root zone were protected by an argon atmosphere. Multi notched impact tests were performed at room temperature. Weld metal had an impact toughness value as 92 J and its fracture surface exhibited several oriented cracking paths due to its solidified structure. The impact toughness value was measured as 82 J for heat affected zone of SAF 2205 and its fractograph reflected the coarser and deeper dimples. Heat affected zone of nickel based alloy had the highest impact toughness value as 116 J among the studied joints due to the more plastic deformation capability of nickel having face centered cubic structure, however, its fracture surface under impact loading exhibited several cracks propagating throughout the fusion line having equiaxed dendrites.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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