Abstract
A new generation of aircraft requires materials giving welded joints capable of operation under extreme conditions including the effect of various embrittling factors and active media in addition to static and cyclic loads. New steels have been developed and conventional steels have been modified with allowance for requirements on the base metal and the welded joints that would provide adaptability to different kinds of welding. The present work concerns the development of principles for alloying and optimizing the phase composition of added materials in welding high-strength steels for a new generation of aircraft. Corrosion-resistant steels and additives for parts operating under the effect of embrittling factors (cryogenic temperatures, temperature instability of the martensite matrix) and structural steels with elevated strength and reliability are considered.
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