Open AccessElevated Temperature Mechanical Properties of in-situ Synthesized TiB2/Al-4.5Cu Matrix Composites
Author(s) -
Yanqing Xue,
Qitang Hao,
Bo Li,
Xinliang Wang,
Han Zhang,
Dayong Wu,
E. Weijie Liang,
Ru-Keng Su
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1885/3/032041
Subject(s) - materials science , composite material , ultimate tensile strength , microstructure , elongation , grain boundary , aluminium , precipitation , strengthening mechanisms of materials , copper , mass fraction , metallurgy , physics , meteorology
Precipitation coarsening characteristics at elevated temperature have a powerful influence on the thermodynamics properties of TiB 2 particles reinforced aluminium-copper matrix composites (PRAMCs), aging precipitation of θ-Al 2 Cu is stable at room temperature, but coarsening occurs at elevated temperature, In this paper, Al-4.5Cu matrix composites with different content TiB 2 are prepared via the molten salt reaction to evaluate the microstructures transformation and the related elevated temperature mechanical properties. Experimental results show that yield strength (YS) and ultimate tensile strength (UTS) of TiB 2 /Al-4.5Cu composites increase with the augment of TiB 2 mass fraction, while the elongation decreases gradually both at elevated-temperature of 453k and 493k. The analysis suggests that the remarkable α-Al grain refinement along with pinning effect of TiB 2 particles has a great effect on the grain boundary sliding and migration at high temperature. Additionally, interface debonding also affects the damage and fracture of the composites.