Abstract
ABSTRACTThe objective of this research was to assess the SPS-forge response of fully pre-alloyed aerospace grade 7055 (Al–8Zn–2.1Mg–2.3Cu–0.2Zr) powder. The core variables investigated were the sintering temperature, time, and atmosphere employed, as well as the average particle size and the manner of uni-axial loading. Samples sintered in vacuum at 500°C for 40 min with delayed loading offered the most desirable combination of density, hardness, and bend properties but remained relatively brittle. Hot forging of the sintered preforms was found to impart sizable gains in mechanical properties. The SPS-forge product exhibited tensile yield strength of 603 MPa coupled with a ductility of 9.1% and a hardness of 93 HRB. All such properties were largely equivalent to those measured for the wrought counterpart.
Published Version
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