The unique properties of titanium alloy, such as high strength, low weight, and low density, have made the titanium alloy a very useful material in the manufacture of exhaust systems. Alloys range from CP (commercially pure) titanium to alpha/beta and beta titanium alloys. CP titanium or its modified alloys are successfully used for exhaust pipes and mufflers in the motorcycle industry as well as in the car industry. The final thesis presents the process of welding the exhaust system from titanium alloys and the properties of welded joints. The welding process and the hand welded expansion chamber, from start to finish are presented. Different titanium alloys and their properties and a comparison of different welding technologies are described. At the end of welding, the weld is inspected if it meets the standards and quality, with non-destructive testing methods that check the quality of welded joints. We have found that titanium is a highly reactive metal and susceptible to atmospheric contamination, so we must be especially careful when welding it. What degree of contamination is present on titanium is nicely seen by the color of the weld. The weld without contamination is shiny silver, but if the weld is of a different color, there is contamination that needs to be removed.
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