Effect of deviations of the chemical composition of high-strength steel and electrode wire on the mechanical properties of narrow-gap welded joints

Sholokhov, Mikhail Aleksandrovich; Erofeev, V. A.; Poloskov, S. I.

doi:10.1080/09507116.2017.1343978

Cited by 1 publication

(1 citation statement)

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“…This method rarely guarantees the desired quality due to equipment used and the environment [1]. The works of [5, [14][15][16] on the influence of narrow gap welding on mechanical properties of steel materials cannot be overemphasised. Narrow gap in combination with GMAW has been utilized by [17] on the study of arc characteristics and their influences on weld bead geometry in narrow gap GMAW as well as [18] on Characteristics of GMAW Narrow Gap Welding on the Armor Steel of Combat Vehicles.…”

Section: Brief Literaturementioning

confidence: 99%

Optimisation of process parameters for M.A.G welding of API X70m material to predict tensile strength using Taguchi method

Akonyi¹,

Olugboji²,

Egbe³

et al. 2021

Nig. J. Tech.

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Girth welded replica of API X70M material have been produced on NG-GMAW welding technique. The particular area of interest is to develop suitable girth welding process parameter using NGGMAW. The major aim of the work was to replicate welds having tensile strength between 650 and 680 MPa. Design of Experiment (DoE) method by Taguchi design, using some selected welding processes was adopted. Two process parameters (factors) – arc voltage and wire feed rate, (the variables), and three levels were used. The resultant joint property on tensile strength of X70M pipeline was examined. The targeted mechanical property was achieved by selecting the best process parameters. Their effects on ultimate tensile strength – UTS was analysed using statistical technique – analysis of variance - ANOVA and Signal to Noise - S/N ratio with ‘thebigger-the–better’ value. Validation was done using MIDAS NFX (an FEA) mechanical engineering software. In conclusion, process parameters that affects or influences the girth welded properties of API X70M under field conditions were identified. Guidance for the specifications and selection of processes that could be used in field-welding for optimum performance has been recommended. Keywords: Optimization, Girth-Weld, Process Parameters, Tensile Strength, NG-GMAW

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