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Effect of annealing treatment on microstructures and properties of austenite-based Fe-28Mn-9Al-0.8C lightweight steel with addition of Cu.
- Source :
-
China Foundry . May2021, Vol. 18 Issue 3, p207-216. 10p. - Publication Year :
- 2021
-
Abstract
- The mechanical properties of an austenite-based Fe-Mn-Al-C lightweight steel were improved by co-precipitation of nanoscale Cu-rich and κ-carbide particles. The Fe-28Mn-9Al-0.8C-(0,3)Cu (wt.%) strips were near-rapidly solidified and annealed in the temperature range from 500 °C to 700 °C. The microstructure evolution and mechanical properties of the steel under different annealing processes were studied. Microstructural analysis reveals that nanoscale κ-carbides and Cu-rich particles precipitate in the austenite and ferrite of the steel in this annealing temperature range. Co-precipitation of nanoscale Cu-rich particles and κ-carbides provides an obvious increment in the yield strength. At the annealing temperature of 600 °C, both the yield strength and ultimate tensile strength of Fe-28Mn-9Al-0.8C-3Cu (wt.%) steel strip are the highest. The total elongation is 25%, which is obviously higher than that of Cu-free steel strips, for the addition of Cu reduces the large sized κ-carbides precipitated along austenite/ferrite interfaces. When the annealing temperature rises to 700 °C, the strength and ductility of the two steel strips deteriorate due to the formation of massive intergranular κ-carbides precipitated along austenite/ferrite interfaces. It can be concluded that a proper co-precipitation of Cu-rich particles and κ-carbides would improve the properties of austenite-based Fe-Mn-Al-C steel. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16726421
- Volume :
- 18
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- China Foundry
- Publication Type :
- Academic Journal
- Accession number :
- 150934979
- Full Text :
- https://doi.org/10.1007/s41230-021-1026-6