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- W4313479080 abstract "In the development of Fe–Mn–Al–C light steel, the density cannot be further reduced, and the specific strength is lower. In this paper, the microstructure and mechanical properties of Fe–30Mn–10Al–1.5C–xBe (x = 0, 0.5, 1.0, 1.5) cast and rolled at 1050 °C were systematically studied by alloying a lighter element beryllium (ρ =1.848 g/cm3). Results show that the microstructure of the experimental steel changes from a single austenite to a dual-phase steel of austenite and ferrite with the increase of Be content. The addition of Be causes the as-cast steel to form needle-like structure (Be-Fe phase), whereas the hot-rolled steel shows a spherical and dot-like structure. When the content of Be is 0.5%(wt%), the appearance of the spherical and dot-like structure after hot rolling improves the strength and ductility of the steel because of solid solution strengthening and grain refinement. However, the elongation of the steel decreases slightly with the increase of Be content. By contrast, the density of the experimental steel alloyed by Be is significantly reduced. The density of the new low-density steel is about approximately 6.25 g/cm3 because of the addition of 1.5 wt% Be, which is 19.87% lower than the commonly used steel grade (ρ = 7.82 g/cm3) and 3.8% lower than the Fe–Mn–Al–C steel (ρ = 6.50 g/cm3). In this experiment, the strength, hardness and elongation of the steel with (0.5–1.5 wt%) Be content are kept at a high level. This result has never occurred in the previous Fe–Mn–Al–C system steel." @default.
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- W4313479080 date "2023-02-01" @default.
- W4313479080 modified "2023-10-06" @default.
- W4313479080 title "Microstructure and mechanical properties of a Fe–30Mn–10Al–1.5C–xBe (x = 0, 0.5, 1.0, 1.5) Be low-density steels" @default.
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- W4313479080 doi "https://doi.org/10.1016/j.matchar.2022.112643" @default.
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