Assessment and statistical correlation of mechanical properties of double sided single pass submerged arc welded line pipe steel

Adel Saoudi; Mamoun Fellah; Amel Sedik; Djahida Lerari; Farida Khamouli; L'hadi Atoui; Khaldoun Bachari

Engineering Science and Technology, an International Journal (Apr 2020)

Assessment and statistical correlation of mechanical properties of double sided single pass submerged arc welded line pipe steel

Adel Saoudi,
Mamoun Fellah,
Amel Sedik,
Djahida Lerari,
Farida Khamouli,
L'hadi Atoui,
Khaldoun Bachari

Affiliations

Adel Saoudi: CRAPC Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques CRAPC, Zone Industrielle Bou-Ismail, Tipaza, PO 384, RP 42001, Algeria; Metallurgy and Materials Engineering Laboratory (LMGM), BADJI Mokhtar – Annaba University, PO 12, CP 23000, Algeria
Mamoun Fellah: Mechanical Engineering Department, ABBES Laghrour-Khenchela University, PO 1252, CP 40004, Algeria; Tribology and Materials Group, Laboratory of Foundry, Badji Mokhtar University, Annaba, PO 12, CP 23000, Algeria; Corresponding author at: Mechanical Engineering Department, ABBES Laghrour-Khenchela University, PO 1252, CP 40004, Algeria.
Amel Sedik: CRAPC Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques CRAPC, Zone Industrielle Bou-Ismail, Tipaza, PO 384, RP 42001, Algeria
Djahida Lerari: CRAPC Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques CRAPC, Zone Industrielle Bou-Ismail, Tipaza, PO 384, RP 42001, Algeria
Farida Khamouli: Metallurgy and Materials Engineering Laboratory (LMGM), BADJI Mokhtar – Annaba University, PO 12, CP 23000, Algeria
L'hadi Atoui: Metallurgy and Materials Engineering Laboratory (LMGM), BADJI Mokhtar – Annaba University, PO 12, CP 23000, Algeria
Khaldoun Bachari: CRAPC Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques CRAPC, Zone Industrielle Bou-Ismail, Tipaza, PO 384, RP 42001, Algeria

Journal volume & issue: Vol. 23, no. 2
pp. 452 – 461

Abstract

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This study aims to assess mechanical properties of submerged arc welded, high-strength, line pipe steel API X70. The obtained weldment as well as the base metal were assessed for strength, ductility, hardness, toughness and weldability. Results showed that the fusion zone presented the highest hardness and the lowest impact strength due to the as-deposited microstructure. In addition, the ultimate tensile strength of the weldment (UTSw) overmatched the tensile strength of base metal (UTS). The second part of this paper deals with statistical analysis of experimental data using correlation and simple linear regression. Results showed that the yield strength (YS) can effectively be used to estimate the ultimate tensile strength (UTS) and the yield to tensile ratio (YTR) of base metal with coefficients of determination R2 around 80 and 65%, respectively. In addition, (UTSw) can also be predicted based on (UTS) values with a coefficient of determination R2 about 60%. Predicted values are in good agreement with experimental data. The proposed models can be readily used in practice.

Published in Engineering Science and Technology, an International Journal

ISSN: 2215-0986 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: http://www.journals.elsevier.com/engineering-science-and-technology-an-international-journal/

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