Dispersion strengthened, direct laser deposited Ti-8Al-1Er

摘要

The purpose of the study described in this paper was to characterize the elevated temperature tensile and creep properties of direct laser deposited Ti-8Al-1Er. These properties are compared to those for Ti-6Al-4V, which is specified for service up to 315 deg C and is the most common titanium aircraft alloy; and Ti-6242, the most common high-temperature titanium alloy used in jet engine compressors manufactured in the United States and sped-fled for service up to 540 deg C. Direct laser deposited Ti-8Al-1Er combines the technology of the Laser Engineered Net Shaping (LENS) process with in-situ dispersion alloying and rapid solidification of an alpha titanium alloy. The result is a low cost' precipitation-strengthened titanium alloy that has potential for excellent high-temperature properties.