Effect of second-phase particles on the properties of W-based materials under high-heat loading
oleh: Xiao–Yue Tan, Ping Li, Lai–Ma Luo, Qiu Xu, Kazutoshi Tokunaga, Xiang Zan, Yu–Cheng Wu
| Format: | Article |
|---|---|
| Diterbitkan: | Elsevier 2016-12-01 |
Deskripsi
W, W-TaC, and W-TiC materials were subjected to heat–load tests in an electron beam facility (10keV, 8kW) at 100 pulses. After heat loading, severe cracks and plastic deformation were detected on the surface of pure W materials. However, plastic deformation was the primary change on the surfaces of W-TaC and W-TiC alloys. This phenomenon was due to the second-phase (TaC and TiC) particles dispersed in the W matrix, which strengthened the grain boundaries and prevented crack formation and propagation. In addition, the microhardness of W and W-TiC obviously decreased, whereas that of W-TaC did not change considerably before and after heat loading.