TY - JOUR
T1 - Mechanical investigations of astm a36 welded steels with stainless steel cladding
AU - Preedawiphat, Pavaret
AU - Mahayotsanun, Numpon
AU - Sa-ngoen, Keerati
AU - Noipitak, Mai
AU - Tuengsook, Pongsak
AU - Sucharitpwatskul, Sedthawatt
AU - Dohda, Kuniaki
N1 - Funding Information:
This research was funded by the Thailand Research Fund (TRF), grant number PHD5910086. The APC was funded by Khon Kaen University. The authors would like to acknowledge the supports of LPN Metallurgical Research Center; Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University; King Mongkut's University of Technology Thonburi; National Metal and Materials Technology Center (MTEC); and Department of Mechanical Engineering, Northwestern University.
Funding Information:
Funding: This research was funded by the Thailand Research Fund (TRF), grant number PHD5910086. The APC was funded by Khon Kaen University.
Publisher Copyright:
© 2020 by the authors.
PY - 2020/9
Y1 - 2020/9
N2 - The in-service life of ASTM A36 welded steel pipes in power plants is often shortened by ash corrosion. During the heating condition, the ash deposition on the welded steel pipes gradually reduces the thickness of the pipes, thus, reducing the lifetime. Instead of replacing the pipes with new ones, the cost could be significantly reduced if the lifetime could be further extended. Weld cladding was the method selected in this study to temporarily extend the service life of welded pipes. This paper performed the mechanical investigations of A36-A36 welded steel plates after coating the surfaces with 309L stainless steel with a cladding method. The residual stress was also tested to observe the internal stresses developed during the welding processes of A36-A36 specimens. The comparison between the coated and non-coated surfaces of welded steels was performed by using the tensile tests (at room and elevated temperatures), corrosion (pitting corrosion, intergranular corrosion, and weight-loss corrosion) tests, and wear (shot blasting) tests. The life-extension of both coatings was evaluated based on the tensile tests and the corrosion and wear tests provided the qualitative evaluations of the coating performance. The results showed that surfaces coated by cladding could be used to temporarily extend the life of ASTM A36 welded steel under the studied conditions.
AB - The in-service life of ASTM A36 welded steel pipes in power plants is often shortened by ash corrosion. During the heating condition, the ash deposition on the welded steel pipes gradually reduces the thickness of the pipes, thus, reducing the lifetime. Instead of replacing the pipes with new ones, the cost could be significantly reduced if the lifetime could be further extended. Weld cladding was the method selected in this study to temporarily extend the service life of welded pipes. This paper performed the mechanical investigations of A36-A36 welded steel plates after coating the surfaces with 309L stainless steel with a cladding method. The residual stress was also tested to observe the internal stresses developed during the welding processes of A36-A36 specimens. The comparison between the coated and non-coated surfaces of welded steels was performed by using the tensile tests (at room and elevated temperatures), corrosion (pitting corrosion, intergranular corrosion, and weight-loss corrosion) tests, and wear (shot blasting) tests. The life-extension of both coatings was evaluated based on the tensile tests and the corrosion and wear tests provided the qualitative evaluations of the coating performance. The results showed that surfaces coated by cladding could be used to temporarily extend the life of ASTM A36 welded steel under the studied conditions.
KW - Astm a36
KW - Cladding
KW - Corrosion
KW - Shot blasting
KW - Stainless steel
KW - Wear
KW - Welding
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U2 - 10.3390/coatings10090844
DO - 10.3390/coatings10090844
M3 - Article
AN - SCOPUS:85090590105
SN - 2079-6412
VL - 10
JO - Coatings
JF - Coatings
IS - 9
M1 - 844
ER -