[Kovove materialy - Metallic materials]
    Mon - April 22, 2024 - 06:07 No. of hits : 1743024 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 51 (2013), Issue 4

The effect of nozzle orifice diameter on penetration depth and mechanical properties of AISI430/AISI1040 dissimilar steel joined by keyhole PTA welding process
TEKER, T., ÖZDEMIR, N.
vol. 51 (2013), no. 4, pp. 241 - 249
DOI: 10.4149/km_2013_4_241

Abstract
In this study, AISI 430/AISI 1040 steel couple 10 mm thick were welded in the butt position without any pre-treatment using keyhole plasma transferred arc (KPTA) process. Welded joints were manufactured selecting constant welding speed (0.01 m min-1) and two different nozzle orifice diameter (2.4 and 3.2 mm), three different welding currents (130, 135 and 140 A), at a constant plasma gas flow (1.2 l min-1), a shielding gas flow (25 l min-1). The microstructural changes that occurred in the interface regions of the welded samples were examined by microhardness, Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Energy Dispersive Spectrometer (EDS). In order to determine mechanical properties of samples, the V-notch Charpy tests were performed. In addition, fracture types in the notch impact strength tests of samples were determined from the fractographic examinations using SEM.

Key words
plasma transferred arc welding, keyhole, AISI 430, AISI 1040, nozzle orifice diameter

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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