Improving the Mechanical Properties of Al-Si Composites through the Synergistic Strengthening of TiB<sub>2</sub> Particles and BN Nanosheets
oleh: Yiren Wang, Jian Wang, Zunyan Xu, Baoqiang Xu, Bingheng Yu, Jianwu Dong, Caiju Li
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2024-08-01 |
Deskripsi
The size and distribution of the silicon phase and intermetallic phase are important factors affecting the properties of Al<sub>11</sub>Si<sub>3</sub>Cu<sub>2</sub>NiMg alloy (M142). In this study, BNNS and micro-TiB<sub>2</sub> were used to synergistically refine and reinforce M142 composites (M142-BNNS-TiB<sub>2</sub>). After T6 heat treatment, the comprehensive mechanical properties of M142-BN-TiB<sub>2</sub> composites were excellent, with an ultimate tensile strength of 463 MPa and an elongation of 2.6%. In addition, the introduction of BNNS and micro-TiB<sub>2</sub> changed the fracture mode of M142 from brittle fracture to quasi-cleavage fracture, and the introduction of BNNS and micro-TiB<sub>2</sub> refined the Si phase and intermetallic phase, which could change the origin of the crack in the composite, thus improving the ductility of the composite.