Effect of Ti interlayer on the bonding quality of W and steel HIP joint
| Autor: | Guang-Nan Luo, Ran Wei, Wanjing Wang, Qiang Li, Chunyi Xie, Jichao Wang, Xingli Wang, Z. Sun |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Nuclear and High Energy Physics Materials science Metallurgy Charpy impact test chemistry.chemical_element Microstructure 01 natural sciences 010305 fluids & plasmas Solid solution strengthening Brittleness Nuclear Energy and Engineering chemistry Hot isostatic pressing 0103 physical sciences Shear strength General Materials Science Diffusion bonding Titanium |
| Zdroj: | Journal of Nuclear Materials. 485:8-14 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2016.12.024 |
| Popis: | Tungsten (W) and steel bonding is one of the key technologies for blanket First Wall (FW) manufacture in thermal fusion reactor. The W/Steel joints are prone to fail without interlayer for the different thermo physical properties. To study the effect of titanium (Ti) interlayer on the bonding quality of W and steel joints, W/Steel Hot Isostatic Pressing (HIP) experiments with Ti interlayer were conducted under 930 °C, 100 MPa for 2 h. Intermetallics caused by atom interdiffusion would affect the bonding quality of W/Ti/Steel HIP joints, the bonding quality was evaluated by microstructure analysis and mechanical tests. All the HIP joints were well bonded and results showed no intermetallics occurred between W/Ti interfaces, meanwhile multiply phases were found between Ti/Steel interfaces. Shear tests indicated when Ti thickness was 100–500 μm, the maximum shear strength of W/Ti/Steel HIP joints would be up to around 151 MPa. Charpy impact tests showed the W/Ti/Steel HIP joints all broke in a brittle manner and the maximum Charpy impact energy was ∼0.192 J. Nano-indentation tests demonstrated W/Ti interfaces could be enhanced by solid solution hardening and formation of brittle phases has conducted high hardness across the Ti/Steel interfaces. |
| Databáze: | OpenAIRE |
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