Structure Characterization and Impact Effect of Al-Cu Graded Materials Prepared by Tape Casting

Abstract

With the need of developing new materials, exploring new phenomenon, and discovering new mechanisms under extreme conditions, the response of materials to high-pressure compression attract more attention. However, the high-pressure state deviating from the Hugoniot line is difficult to realize by conventional experiments. Gas gun launching graded materials could reach the state. In our work, the corresponding Al-Cu composites and graded materials are prepared by tape casting and hot-pressing sintering. The microstructure and the acoustic impedance of the corresponding Al-Cu composites are analyzed to explain the impact behavior of Al-Cu graded materials. Computed tomographic testing and three-dimension surface profilometry machine results demonstrated well-graded structure and parallelism of the graded material. Al-Cu GMs with good parallelism are used to impact the Al-LiF target at 2.3 km/s using a two-stage light-gas gun, with an initial shock impact of 20.6 GPa and ramping until 27.2 GPa, deviating from the Hugoniot line.

Experimental study on tribological behavior of aluminum–copper functionally graded material

“…Few other works examined the acoustic impedance, residual stresses, and corrosion wear. 4,30,31 To the best of authors knowledge, no work was reported on tribological properties of Al-Cu FGM. Thus, present work is an attempt made to explore the erosion wear and abrasive wear behavior of Al-Cu MFGM fabricated through PM.…”