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- Title
The Effect of Extrusion Parameters on the Microstructure and Mechanical Properties of TiC<sub>p</sub>/Mg-2.4Al-2.4Ca-0.6Mn Nanocomposites.
- Authors
Li, Hongwei; Nie, Kaibo; Liu, Zhilong; Yang, An; Deng, Kunkun
- Abstract
TiCp/Mg-2.4Al-2.4Ca-0.6Mn (wt.%) nanocomposites have been extruded at different extrusion parameters. The grain of the composites was remarkably refined, and main second phase changed from the continuous network (Mg, Al)2Ca(C36) phase to the fractured (Mg, Al)2Ca(C36) phase with the decrease of extrusion temperature and speed. All the extruded composites displayed basal poles which are preferentially perpendicular to the extrusion direction (ED). As the extrusion speed increased, the basal plane (0002), prismatic type I side (10 1 ¯ 0) and prismatic type II side (11 2 ¯ 0) of TiCp/AXM2206 composites showed a weakening trend. The texture composition of extruded TiCp/AXM2206 composites was greatly affected by the degree of dynamic recrystallization (DRX) and the precipitates. The TiCp/Mg-Al-Ca-Mn nanocomposites exhibited excellent properties with tensile yield strength (TYS) of 400.3 MPa and ultimate strength (UTS) of 417.0 MPa. The improved strength was related to grain refinement, dislocation strengthening, thermal mismatch strengthening, and Orowan strengthening. During the tensile process, a large number of microcracks were formed along the (Mg, Al)2Ca(C36), resulting in structural failure.
- Subjects
STRUCTURAL failures; MICROSTRUCTURE; ULTIMATE strength; GRAIN refinement; RECRYSTALLIZATION (Metallurgy)
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2022, Vol 74, Issue 11, p4226
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-022-05475-x