Journal
METALS
Volume 7, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/met7050183
Keywords
laser beam welding; buy-to-fly; L-joint; T-joint; Ti-6Al-4V
Funding
- Italian Ministry for University and Research (MIUR) [PON01_01269 ELIOS]
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Titanium and its alloys are increasingly being used in aerospace, although a number of issues must be addressed. Namely, in the framework of welding to produce complex parts, the same mechanical strength and a reduced buy-to-fly ratio are desired in comparison with the same components resulting from machining. To give grounds to actual application of autogenous laser beam welding, Ti-6Al-4V L- and T-joints have been investigated in this paper, as they are a common occurrence in general complex components. Discussions in terms of possible imperfections, microstructure, and microhardness have been conducted. Then, a real part consisting of a support flange for aerospace application has been chosen as a valuable test-article to be compared with its machined counterpart both in terms of strength and buy-to-fly. The feasibility and the effectiveness of the process are shown.
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