Automatic Welding, 2016, №06



2016 №06 (11)

DOI of Article 10.15407/as2016.06.12

2016 №06 (13)

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Avtomaticheskaya Svarka (Automatic Welding), #6, 2016, pp. 74-81

Application of friction stir method for welding of magnesium alloys and of their structure modifying

A.L. Majstrenko¹, V.A. Lukash¹, S.D. Zabolotny¹ and R.V. Strashko²

¹V.N. Bakul Institute for Superhard Materials, NASU, 2 Avtozavodskaya Str., Kiev, 04074, Ukraine. E-mail:3ab@ukr.net
²E.O. Paton Electric Welding Institute, NASU, 11 Kazimir Malevich Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua


Abstract
A technological process was developed for friction stir processing of surfaces of parts from magnesium and aluminum alloys for structure modification directed on formation of layer of fine-grain alloy structure (grain size 1.2–4.5 mm) that is 16–63 times less than the initial metal grain size (75.8 mm). It is determined that the maximum temperature of alloy heating in zone of contact interaction of a tool with FS-processed layers of the samples from researched alloys has reached 340–380 °C. Analysis of effect of kinetic parameters of the tool on change of microstructure of modified surface layers of the parts and welded joints was carried out. 18 Ref., 11 Figures, 3 Tables.

Keywords: friction stir welding, heat generation at fruction stir process, plastic deformations, width of thermomechanical-affected zone, microstructure grain size


Received:                28.03.16
Published:               19.07.16


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