Microstructural Evolution and Carbon Partitioning in Interstitial Free Weld Simulated API 5L X60 Steel

The microstructural characterizations and partitioning of carbon element in the weld heat affected zones of a commercial API 5L X60 line pipe steel were studied by applying a high speed heating and cooling dilatometry technique in the present research work. The hollow cylindrical specimens were quic...

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Published inReviews on advanced materials science Vol. 58; no. 1; pp. 206 - 217
Main Authors Zarchi, Hamid Reza Karimi, Khajesarvi, Ali, Banadkouki, Seyed Sadegh Ghasemi, Somani, Mahesh C.
Format Journal Article
LanguageEnglish
Published De Gruyter 26.11.2019
Subjects
carbon partitioning
Commercial X-60 line pipe steel
construction of CCT diagram
rapid heating and cooling dilatometry technique
weld simulation
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Summary:The microstructural characterizations and partitioning of carbon element in the weld heat affected zones of a commercial API 5L X60 line pipe steel were studied by applying a high speed heating and cooling dilatometry technique in the present research work. The hollow cylindrical specimens were quickly heated to 1000°C, soaked for only 5 s followed by continuous cooling to ambient temperature. Besides the construction of CCT diagram of this high strength low alloy steel using the dilatation data, the hardening response, microstructural features and carbon partitioning of weld simulated specimens were investigated. The obtained results showed that the hardening response of samples increased from 142 to 261 with increasing cooling rates. These hardening variations were attributed to the changes in microstructural features and carbon partitioning that occurred between the microconstituents present in the microstructures of weld simulated samples.
ISSN:1605-8127
1605-8127
DOI:10.1515/rams-2019-0016