Properties and Microstructure Evaluation of Laser-Welded TP347—TP904L High-Alloy, Stainless Steels Joints, Modified with 309L Filler

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F25%3A10259048" target="_blank" >RIV/61989100:27230/25:10259048 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1996-1944/18/24/5633" target="_blank" >https://www.mdpi.com/1996-1944/18/24/5633</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma18245633" target="_blank" >10.3390/ma18245633</a>

Result language

angličtina

Original language name

Properties and Microstructure Evaluation of Laser-Welded TP347—TP904L High-Alloy, Stainless Steels Joints, Modified with 309L Filler

Original language description

This study presents the results of laser beam welding of dissimilar high-alloy super stainless steels. Differences in their thermal and mechanical properties pose significant challenges in manufacturing processes. The present work demonstrates the potential advantages of using 309L filler material in laser welding of high-alloy materials with different properties. The research focuses on a comparative evaluation of the effects of 309L filler metal on the TP904L-TP347 joint in terms of joint strength and microstructure. The analysis of the joints provides insight into the role of the filler metal in improving joint properties. The obtained results show that both welds exhibit a similar microstructure composed of pillar, cellular, and equiaxed dendrites; however, they differ in dendrite growth orientation, calculated ferrite number (FN), the G/R ratio, and dendrite arm spacing, indicating a lower thermal gradient in the joint welded with filler metal. The results also reveal the presence of precipitates in the welds near the TP904L steel fusion line, most likely Cr23C6 type. Mechanical properties evaluation, based on standard and miniaturized tensile tests as well as hardness measurement, shows that the use of 309L filler metal improves both the joint strength and ductility, although it does not significantly affect the material hardness.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20500 - Materials engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Materials

ISSN

1996-1944

e-ISSN

1996-1944

Volume of the periodical

18

Issue of the periodical within the volume

24

Country of publishing house

CH - SWITZERLAND

Number of pages

19

Pages from-to

1-19

UT code for WoS article

001647080500001

EID of the result in the Scopus database

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