Abstract
Favorable parameters for selective melting methods using electron and laser radiation have been established to obtain the required geometric, physical and mechanical characteristics of thin-walled parts for aviation purposes from H18N9T (analogue AISI 321) and Ti6Al4V alloys. Parts were manufactured and field tests were carried out on the stand. It has been shown that the technological processes developed using the SLM and SEBM methods can be recommended for the manufacture of thin-walled parts working in conditions of rapidly changing deformations.
Highlights
Success in the development of aviation depends on a reduction in the mass of aircraft structures [1]
The objective of this work is to establish preferred parameters for selective melting by electron and laser radiation to obtain the required geometric, physical and mechanical characteristics of H18N9T and Ti6Al4V alloys used for the manufacture of protective aircraft air intake lattice modules (Fig. 1a)
The dispersed composition of PRH18N9T and Arcam Titanium Ti6Al4V (Grade 5) (Sweden) was determined to be a fraction of 45 to 100 μm on an OCCHIO500nano image analyzer using image static analysis according to ISO 13322-1
Summary
Success in the development of aviation depends on a reduction in the mass of aircraft structures [1]. The use of monolithic structures instead of prefabricated ones gives, depending on the type of structures, a savings in weight from 5 to 10 % [2]. The resource of monolithic structures is higher than that for prefabricated ones. The separation of the design into a large number of small individual parts during the design and manufacture adversely affects the weight, cost and accuracy of manufacture, as well as the quality of the outer surface. All this creates the prerequisites for a wider implementation of monolithic structures in the practice of aircraft construction. When replacing prefabricated structures with a single monolithic part, the question of semi-finished products and methods for manufacturing parts arises in connection with the continuing growth in the size and complexity of such structures
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