Influence of Filler Metal on the Microstructure and Mechanical Properties of 316Ti–15-5 PH Stainless Steel Weld Joints

Dissimilar metal weld joints of austenitic stainless steel (SS) 316Ti and 15-5PH stainless steel were produced through gas tungsten arc welding (GTAW) using two different grades of filler wire, viz., ER316L (austenitic grade) and ER630 (PH grade). Microstructure evaluation and mechanical properties...

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Bibliographic Details
Published inJournal of materials engineering and performance Vol. 31; no. 12; pp. 10099 - 10107
Main Authors Kumar, Ravi Ranjan, Singh, Randhir Kumar, Anoop, C. R., Das, Ranjan, Narayana Murty, S. V. S., Thomas Tharian, K., Alex, A.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.12.2022
Subjects
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Materials Science
Quality Control
Reliability
Safety and Risk
Technical Article
Tribology
316Ti
gas tungsten arc welding
dissimilar metal welding
stainless steel
15-5PH steel
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Summary:Dissimilar metal weld joints of austenitic stainless steel (SS) 316Ti and 15-5PH stainless steel were produced through gas tungsten arc welding (GTAW) using two different grades of filler wire, viz., ER316L (austenitic grade) and ER630 (PH grade). Microstructure evaluation and mechanical properties of weldments were carried out to derive the best filler wire combination. The results showed that the joints prepared with ER316L filler wire possess austenite-ferrite dendritic weld structure and has lower strength than the 316Ti base metal. The weld joint ER630 filler wire displayed superior mechanical properties compared to the weld with ER316L filler wire. The use of ER630 filler wire led to the formation of martensitic structure in the weld, making the weld stronger than the austenitic 316Ti base metal. Thus, failure occurred in the base metal 316Ti during testing instead of weld. However, the fractographic examination of tensile tested specimens revealed presence of dimples in both cases, indicating that the failure mode was ductile. Based on this study, it is recommended to use ER630 filler wire to weld 316Ti–15-5PH for obtaining stronger weld joints.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-022-07000-2