中國(guó)有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 31 No. 2 February 2021 |
（1. Mechanical Engineering Department, Bu-Ali Sina University, Hamedan 65174, Iran;
2. Department of Soil Science, Faculty of Agriculture, Guilan University, Rasht 4199613776, Iran;
3. Mechanical Engineering Department, Ayatollah Boroujerdi University, Boroujerd 6919969737, Iran）
Abstract:The present study aims to fabricate and evaluate the mechanical properties and wear behavior of Mg metal matrix composite, reinforced by 0, 1.5, 3, 5 and 10 vol.% B4C microparticles. Mg-B4C samples were fabricated at 450 °C and under different loading rates by using split Hopkinson bar (SHB), drop hammer (DH) and Instron (QS) at strain rates of 1600, 800 and 0.008 s–1, respectively. The mechanical properties including microhardness, quasi-static and dynamic compressive strengths and wear behavior of samples were experimentally investigated. The results show that, the hardness of SHB and DH samples is obtained to be 20.2% and 5.7% higher than that of the QS sample, respectively. The wear rate and wear mass loss of Mg–10.0%B4C samples fabricated by SHB were determined lower than those of the QS sample by nearly 33% and 39%, respectively. The quasi-static compressive strengths of Mg-5.0%B4C are improved by 39%, 30% and 29% for the SHB, DH and QS samples, respectively, in comparison with the case of pure Mg. Furthermore, it is discovered that the dynamic compressive strength of samples is 51%-110% higher than their quasi-static value with respect to the B4C content.
Key words: powder compaction; high strain rate; Mg-B4C composite; hardness; mechanical properties; wear behavior
