Publications

Microstructure and properties of PH13-8Mo steel fabricated by LENS®

Zheng, B.; Smugeresky, J.E.; Zhou, Y.; Lavernia, E.J.

Laser Engineered Net-shaping (LENS®) can directly manufacture near net shape metallic components from CAD files. The thermal history associated with LENS® process, which involves numerous reheating cycles, is critical to the microstructural evolution and mechanical properties of the LENS® fabricated parts. In this paper, the surface morphology of as-atomized PH13-8Mo steel powder is characterized; Variation of the height of deposited materials with process parameters is measured; Microhardness and tensile tests are carried out to evaluate the mechanical performance of LENS® deposited PH13-8Mo components; Microstructural analysis is conducted using OM, SEM, TEM to understand the microstructural evolution of the LENS® deposited PH13-8Mo samples; The thermal history and its effects on microstructural evolution and resultant mechanical properties is studied in order to understand the relationship between processing parameter, microstructure and mechanical properties of the LENS® fabricated PH13-8Mo components.