| Autor: |
Yuan, Hao, Zhang, Yue, Ganeev, Artur V., Wang, Jing Tao, Alexandrov, Igor V. |
| Zdroj: |
Materials Science Forum; December 2010, Vol. 667 Issue: 1 p701-706, 6p |
| Abstrakt: |
This paper presents the research results of the grain refining effect on the ductile-to- brittle transition temperature (DBTT) of commercial purity tungsten. The as-received tungsten was subjected to eight passes of equal-channel angular pressing (ECAP) at decreasing temperatures from 1300 to 1150 °C. According to optical and TEM microscopy the average grain size was refined considerably from ~80 μm to ~1 μm. The mechanical tensile tests, carried out at various temperatures for the tungsten samples, showed that DBTT decreased approximately 80 °C as a result of microstructure refinement by ECAP, at the same time the strength also increased 50-100 % by grain refinement. SEM observation of the fractures confirmed the mechanical testing results. |
| Databáze: |
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