Structural-Phase Composition and Mechanical Properties of Experimental Compositions of High-Strength Pseudo-beta-Titanium Alloy Containing Rare-Earth Elements

摘要

Mechanical properties, phase composition, and structure of test melts of high-strength pseudo-beta-titanium alloyed with yttrium and gadolinium are studied. Special features of the morphology of REM oxide particles and their distribution within the alloy structure are considered. Quantitative metallographic analysis of the structural components is conducted. Sizes of primary beta-grains, volume fraction of secondary alpha-phase precipitates, secondary precipitate particle content, and alpha-phase shell thickness are determined. Test specimen fracture surfaces are analyzed, and presence of a ductile pitted relief is detected in fractures.