title: Residual microstructure associated with impact crater in Ti-6Al-4V meshes reinforced 5A06Al alloy matrix composite.
abstract: In this paper, TC4(m)/5A06Al composite was hypervelocity impacted by 2024 aluminium projectile with the diameter of 2mm and with the impact velocity of 3.5 km/s. The residual microstructure was observed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HREM). The TC4-Al interface before impact was composed of TiAl(3) phase and Ti(3)Al phase. Near the pithead, separation of TC4 fibers and Al matrix occurred along the impact direction. Around the middle of the crater, TC4 fibers were sheared into several sections. Near the bottom of crater, adiabatic shear band (ASB) occurred in TC4 fiber, while the angle between shear plane and cross section was 45°. The crack propagated along TC4-Ti(3)Al interface during impact and some Ti(3)Al phase at the TC4-Al interface transformed to amorphous with few nanocrystals after hypervelocity impact.
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology, No. 92 West Da-Zhi Street, Harbin 150001, China. guoqianghit@gmail.com
authors.forename: Q
authors.initials: Q
authors.lastname: Guo
authors.forename: G Q
authors.initials: GQ
authors.lastname: Chen
authors.forename: L T
authors.initials: LT
authors.lastname: Jiang
authors.forename: M
authors.initials: M
authors.lastname: Hussain
authors.forename: X L
authors.initials: XL
authors.lastname: Han
authors.forename: D L
authors.initials: DL
authors.lastname: Sun
authors.forename: G H
authors.initials: GH
authors.lastname: Wu