The paper presents the results of the investigation of the surface layer composition of titanium alloy VT6 obtained after ion implantation with tantalum ions. It is shown that tantalum ion implantation can lead to a significant reduction in surface roughness, as well as a beneficial effect on the corrosion properties of the titanium alloy.
The results of the formation of the butt joint of 3 mm thickness plates made of VAL8 and 1151T aluminum alloys in different combination are presented. The ultimate strength of VAL8 and 1151T alloy welded joints during melting welding is 87...88 % of ultimate strength of the VAL8 alloy. The strength coefficient of joints of similar combinations of alloys made by friction stir welding is 0.92...0.93 of the strength coefficient of the VAL8 alloy. The fatigue strength for joints of VAL8 and 1151T alloys is 140 MPa. Joints made by friction stir welding at higher values of fatigue strength (160...200 MPa), withstand approximately 1.5...1.8 times more test cycles than joints obtained by automatic argon-arc welding.
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