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Properties of advancing side of weld in joint welded by FSW

Dudzik K.

Journal of KONES

2014

Vol. 21, No. 3

75--80

The results of mechanical and corrosion properties research of chosen part of joint bonded by Friction Stir Welding – advancing side of the weld, were presented. AW-7020 aluminium alloy was used for research. Research included the following methods: - mechanical properties were carried out using static tensile test in accordance with PN-EN ISO 4136:2011 and PN-EN ISO 6892-1:2010, - Hardness testing in the cross-sections of joints was carried out using Vickers HV5 method in accordance with PNEN ISO 6507-1:2006, - microscopic examination was performed by optical microscope ZEISS Axiovert 25, - the corrosion resistance research was carried out using electrochemical impedance spectroscopy (EIS) method in 3.5% water solution NaCl. During the study obtained higher strength properties for the FSW joint compared to the native material – all samples cracked in the native material. The hardness test shown, that the advanced side of the weld has the highest value of hardness of completely joint. Better resistance to electrochemical corrosion was found for the native material then joint welded by FSW of 7020 aluminum alloy, including the advancing side of the weld. Original value is received results of the mechanical and corrosion properties of advancing side of the weld of FSW welded AW-7020 aluminium alloy.