Influence of Friction Stir Welding (FSW) on Mechanical and Corrosion Properties of AW-7020M and Aw-7020 Alloys

Polish maritime research

Wojciech JurczakAkademia Marynarki Wojennej Wydzia? Mechaniczno-Elektryczny ?midowicza 69, 81-103 Gdynia, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Krzysztof DudzikCorresponding authorAkademia Morska w Gdyni Wydzia? Mechaniczny Morska 81-87 81-225 Gdynia, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar² 

[1] Akademia Marynarki Wojennej Wydzia? Mechaniczno-Elektryczny ?midowicza 69, 81-103 Gdynia, Poland;Akademia Morska w Gdyni Wydzia? Mechaniczny Morska 81-87 81-225 Gdynia, Poland

关键词: Keywords: Al-alloys;    mechanical properties;    electrochemical impedance spectroscopy (EIS);    corrosion;    FSW;    friction welding;   

DOI  :  10.1515/pomr-2016-0036

学科分类：工程和技术（综合）

来源: Politechnika Gdanska * Wydzial Oceanotechniki i Okretownictwa

【 摘 要 】

Friction welding associated with mixing the weld material (FSW - Friction Stir Welding ) is an alternative to MIG and TIG welding techniques for Al-alloys. This paper presents experimental results obtained from static tension tests on specimens made of AW-7020M and AW-7020 alloys and their joints welded by using FSW method carried out on flat specimens, according to Polish standards : PN-EN ISO 4136:2011 and PN-EN ISO 6892-1:2010. Results of corrosion resistance tests are also presented. The tests were performed by using the electrochemical impedance spectroscopy (EIS). EIS measurement was conducted with the use of three-electrode system in a substitute sea water environment (3,5% NaCl - water solution). The impedance tests were carried out under corrosion potential. Voltage signal amplitude was equal to 10mV, and its frequency range - 100 kHz ÷ 0,1 Hz. Atlas 0531 EU&IA potentiostat was used for the tests. For the tested object an equivalent model was selected in the form of a substitute electric circuit. Results of the impedance spectroscopy tests are presented in the form of parameters which characterize corrosion process, as well as on Nyquist’s graphs together with the best-fit theoretical curve.

【 授权许可】

Unknown