Experimental and Computational Investigation of Structural Integrity of Dissimilar Metal Weld Between Ferritic and Austenitic Steel
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
View Archive Info| Field | Value | |
| Title |
Experimental and Computational
Investigation of Structural Integrity of
Dissimilar Metal Weld Between Ferritic
and Austenitic Steel
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| Creator |
Santosh, R
Das, Goutam Kumar, S Singh, P K Ghosh, M |
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| Subject |
Materials Charcterization
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| Description |
The structural integrity of dissimilar metal welded (DMW) joint consisting of low-alloy steel
and 304LN austenitic stainless steel was examined by evaluating mechanical properties and
metallurgical characteristics. INCONEL 82 and 182 were used as buttering and filler materials,
respectively. Experimental findings were substantiated through thermomechanical simulation of
the weld. During simulation, the effect of thermal state and stress distribution was pondered
based on the real-time nuclear power plant environment. The simulation results were co-related
with mechanical and microstructural characteristics. Material properties were varied significantly
at different fusion boundaries across the weld line and associated with complex
microstructure. During in-situ deformation testing in a scanning electron microscope, failure
occurred through the buttering material. This indicated that microstructure and material
properties synergistically contributed to altering the strength of DMW joints. Simulation results
also depicted that the stress was maximum within the buttering material and made its weakest
zone across the welded joint during service exposure. Various factors for the failure of dissimilar
metal weld were analyzed. It was found that the use of IN 82 alloy as the buttering material
provided a significant improvement in the joint strength and became a promising material for
the fabrication of DMW joint.
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| Publisher |
Springer
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| Date |
2018-06-26
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://eprints.nmlindia.org/7780/1/Met_Trans_DMW_2018_1.pdf
Santosh, R and Das, Goutam and Kumar, S and Singh, P K and Ghosh, M (2018) Experimental and Computational Investigation of Structural Integrity of Dissimilar Metal Weld Between Ferritic and Austenitic Steel. Metallurgical and Materials Transactions A, 49A(6) (IF-1.887). pp. 2099-2112. |
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| Relation |
https://link.springer.com/article/10.1007/s11661-018-4554-y
http://eprints.nmlindia.org/7780/ |
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