Online from: 1948
Subject Area: Mechanical & Materials Engineering
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|Title:||Interface characterization of CO|
|Author(s):||Ugur Caligulu, (Technology Faculty, Metallurgy Materials Engineering Department, Firat University, Elazig, Turkey), Mustafa Taskin, (Technology Faculty, Metallurgy Materials Engineering Department, Firat University, Elazig, Turkey), Haluk Kejanli, (Engineering Faculty, Mechanical Department, Dicle University, Diyarbakir, Turkey), Ayhan Orhan, (Technical Education Faculty, Metal Department, Firat University, Elazig, Turkey)|
|Citation:||Ugur Caligulu, Mustafa Taskin, Haluk Kejanli, Ayhan Orhan, (2012) "Interface characterization of CO|
|Keywords:||Austenitic stainless steel, CO2 laser welding, Interface characterization, Joining processes, Low carbon steel, Stainless steel, Welding|
|Article type:||Research paper|
|DOI:||10.1108/00368791211232744 (Permanent URL)|
|Publisher:||Emerald Group Publishing Limited|
|Acknowledgements:||The research was supported by the Scientific and Technological Research Council of Turkey (Project No: TUBITAK -108M401).|
Purpose – The purpose of this paper is to investigate interface characterization of CO
Design/methodology/approach – The microstructures of the welded joints and the heat affected zones (HAZ) were examined by optical microscopy, SEM, EDS and X-Ray analysis. The tensile strength of the welded joints was measured.
Findings – The result of this study indicated that the width of welding zone and HAZ became much thinner depending on the increased welding speed. On the other hand, this width widened depending on the increased heat input. Tensile strength values also confirmed this result. The best properties were observed at the specimens welded under helium atmosphere, at 2500?W heat input and at 200?cm/min welding speed.
Originality/value – There are many reports which deal with the shape and solidification structure of the fusion zone of laser beam welds in relation to different laser parameters. However, the effect of all influencing factors of laser welding has up to now not been extensively researched. Much work is required for understanding the combined effect of laser parameters on the shape and microstructure of the fusion zone. This paper, therefore, is concerned with laser power, welding speed, defocusing distance and type of shielding gas and their effects on the fusion zone shape and final solidification structure of some stainless steels.
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