Author(s)

Chuan Wang ^1,2

Affiliation(s)

¹ State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing, China
² School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, China

Corresponding Author

Chuan Wang

ABSTRACT

This work aims to investigate the microstructure and the mechanical behavior of dissimilar API X80-AISI 4130 steel welded joints of coiled tubing. The microstructure at the weld interface of the AISI 4130 steel side results in a relatively lower toughness. The HAZ of AISI 4130 steel has an obvious coarsening phenomenon. The tensile tests show that the deformation process of the dissimilar weld joint is mainly controlled by the two base materials: AISI 4130 steel at the beginning of the deformation and API X80 steel at its end. Charpy impact toughness tests conducted on dissimilar welded specimens led us to conclude that the higher Ni content accounts for a more gradual decline in impact tough-ness for AISI 4130 steel.

KEYWORDS

Dissimilar welding, Microstructure, Tensile test, Charpy impact toughness test

CITE THIS PAPER

Chuan Wang, Study on the Microstructure Characteristics and Mechanical Properties of Dissimilar Weld Joints of Coiled Tubing. Journal of Materials, Processing and Design (2022) Vol. 6: 20-28. DOI: http://dx.doi.org/10.23977/jmpd.2022.060203.

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