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Outline
Ti-Fe-O alloy with excellent comprehensive mechanical properties is prepared using resource rich Fe2O3 as a strengthening agent and pure Ti powder as raw material， based on ball milling powder mixing， electric field assisted hot pressing sintering technology， and hot rolling process. The impacts of Fe₂O₃ content and the particle size of Ti powder on the microstructure and quasi-tatic tensile properties of the Ti-Fe-O alloys is investigated. The research reveals that an increase in Fe₂O₃ content and a decrease in Ti powder size facilitate the formation of the β phase and refine the α phase grains within the alloy. Hot rolling leads to a significant enhancement in the comprehensive mechanical properties of Ti-Fe-O alloys. The strength improvement is attributed to the interstitial solid-solution strengthening by O elements， grain refinement strengthening resulting from the refinement of the α phase， and the precipitation strengthening of nano-scale acicular secondary α phase within the β phase. Under the condition where the pure Ti particle size ranges from 15 μm to 45 μm （D30）， the as-rolled Ti-0.71%Fe₂O₃ （Ti-0.58Fe-0.29O） and Ti-1.43% Fe2O3（Ti-1.08Fe-0.62O） alloys achieve an excellent strength-plasticity matching effect. Their tensile strengths and elongations at break reach 975 MPa with 20.6% elongation and 1128 MPa with 18.4% elongation， respectively.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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