Microstructure and strengthening behavior of a 80 GPa·% PSE high yield strength Fe–13Mn–6Al-3.5Cr-3.5Si lightweight steel
Source abstract
Abstract
In this study, a new high strength-ductility lightweight steel was designed and fabricated. The density of new lightweight steel reduced to 6.98 g/cm 3 and was 10.5% lower than that of pure iron. Microstructure evolution and mechanical properties of the lightweight steel were investigated after solution treatment. The lightweight steel demonstrated a high parameter sensitivity to solution temperatures. When solution temperature was 1100°C, a matrix of austenite with annealing twinning was obtained. Small Cr 7 C 3 and VC carbides and a few remained ferrites were dispersed inside the austenite matrix. The lightweight steels solution treated at 1100°C and 1200°C contained very small size κ-phase carbides dispersed in the austenite matrix. It may contribute to the precipitation strengthening effect. Only banded B2 phase was present after solution at 1100°C, which enhanced both the strength and plasticity of the steel. High-temperature δ-ferrite was formed within and between austenite grains when solution treated at 1200°C. The presence of brittle δ-ferrite was harmful to the plasticity and it resulted in the poor mechanical properties of the steel. The lightweight steel exhibited optimal mechanical properties after solution at 1100°C for 0.5 h. The tensile strength was 1008 MPa, yield strength was 581 MPa, elongation was 79.3%, and the product of strength and elongation (PSE) could reach up to 80 GPa·%. The yield strength showed an obvious increase and it was over 100 MPa higher than that of conventional Mn13Cr2 engineering steel. The deformation mechanism of the lightweight steel was primarily dominated by planar dislocation slip. A small amount of primary microbands appeared at high deformation levels. The hindering effect of carbides on dislocation slip led to an increase in the strain hardening rate during the deformation process. Overall, the newly developed lightweight steel achieved a high yield strength and good balance between high strength and excellent plasticity for engineering machinery.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Hydrogen embrittlement and corrosion behaviors in metals · High Temperature Alloys and Creep
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (59)
Show source-provided references
1. Microband-induced plasticity in a high Mn–Al–C light steel10.1016/j.msea.2008.05.042 ↗
2. Hierarchical precipitation in a partially recrystallized matrix makes an ultrastrong and ductile lightweight steel
3. A new strengthening mechanism driven by disruptive shear and solute segregation during warm rolling in 1.4 GPa class 12.5 wt% Al added-FeMnC ultra-lightweight steel10.1016/j.jmst.2023.01.047 ↗
4. Copious intragranular B2 nanoprecipitation mediated high strength and large ductility in a fully recrystallized ultralight steel10.1016/j.jmst.2024.12.013 ↗
5. A novel high manganese austenitic steel with higher work hardening capacity and much lower impact deformation than Hadfield manganese steel10.1016/j.matdes.2013.09.057 ↗
6. Effect of intragranular κ carbides and intergranular precipitates on the hot deformation mechanism and dynamic recrystallization mechanism of Fe–28Mn–11Al–1.5C–5Cr lightweight steel10.1016/j.jmrt.2023.10.008 ↗
7. Current state of Fe-Mn-Al-C low density steels10.1016/j.pmatsci.2017.05.002 ↗
8. Effect of annealing time on the microstructure and SCC behavior of an austenite-based low-density steel in a marine atmosphere10.1016/j.corsci.2022.110466 ↗
9. The influence of annealing temperature on the microstructure and mechanical properties of Fe-0.52 C-11Mn-5.14Al-1Cr lightweight steel
10. Room temperature deformation mechanisms of a Fe–Mn–Al–C steel10.1016/j.jmrt.2023.08.195 ↗
11. A strong and ductile ferrite-based lightweight steel manufactured via high-temperature warm rolling process10.1016/j.matchar.2024.113787 ↗
12. Achieving an ultrahigh yield strength of 1.5 GPa in warm-rolled lightweight steel via synergistic multiplication of precipitation and dislocations10.1016/j.matchar.2024.114097 ↗
13. Excellent combination of strength and ductility in austenitic lightweight steel achieved by warm rolling process10.1016/j.msea.2024.147066 ↗
14. Optimizing the microstructure and mechanical properties of Fe-30.5Mn–8Al-1.0C lightweight austenitic steel through thermomechanical treatment10.1016/j.msea.2024.146674 ↗
15. Designing duplex, ultrafine-grained Fe-Mn-Al-C steels by tuning phase transformation and recrystallization kinetics10.1016/j.actamat.2017.09.026 ↗
16. Effect of alloying content on microstructure and mechanical properties of Fe–Mn–Al–C low-density steels
17. The influence of Al content and heat treatment on the microstructure and properties of austenite-ferrite duplex Fe-Mn-Al-C lightweight steels
18. A new hot-rolled lightweight steel with ultra-high strength and good ductility designed by dislocation character and transformation strain10.1016/j.scriptamat.2022.114583 ↗
19. Deformation behaviors and microstructure evolution of a novel multiphase medium Mn high Al lightweight steels with excellent strength-ductility combinations10.1016/j.msea.2023.145478 ↗
20. Low density Fe–Mn–Al–C steels: phase structures, mechanisms and properties10.2355/isijinternational.ISIJINT-2020-467 ↗
21. Precipitation transformation pathway and mechanical behavior of nanoprecipitation strengthened Fe–Mn–Al–C–Ni austenitic low-density steel10.1016/j.jmst.2023.03.052 ↗
22. Achieving strength ductility synergy of multiple hetero-structured Fe–24Mn–10Al–1C duplex lightweight steel10.1016/j.msea.2024.147651 ↗
23. Ultrastrong and ductile austenitic lightweight steel via ultra-fine grains and heterogeneous B2 precipitates10.1016/j.msea.2022.144330 ↗
24. Interplay of austenite and ferrite deformation mechanisms to enhance the strength and ductility of a duplex low-density steel10.1016/j.jmrt.2022.02.111 ↗
25. Microstructure and mechanical behaviour of Nb- containing high Al ferritic low density steels10.1016/j.matchar.2023.113176 ↗
26. Development of novel low density ultra-high strength manganese-steel with significant ductility through thermo-mechanical processing route10.1016/j.msea.2024.146591 ↗
27. Factors influencing the tensile behavior of a Fe–28Mn–9Al–0.8C steel10.1016/j.msea.2008.12.055 ↗
28. Achieving a superior combination of strength and ductility by adjusting heterogeneous structure in a Fe–Mn–Al–Mo–C lightweight steel10.1016/j.msea.2024.147078 ↗
29. Comparative study of tensile properties and impact toughness of duplex lightweight steel10.1016/j.msea.2024.147107 ↗
30. Synergistic strengthening effect achieved good ductility in ultrahigh strength Fe–22Mn–8Al-0.8C austenitic lightweight steels10.1016/j.vacuum.2024.113262 ↗
31. Microstructure evolution and mechanical behavior of Fe–Mn–Al–C low-density steel upon aging10.1016/j.msea.2023.145109 ↗
32. Improvement of strength – ductility balance of B2-strengthened lightweight steel10.1016/j.actamat.2020.03.022 ↗
33. Research status and development prospect of Fe–Mn–C–Al system low-density steels10.1016/j.jmrt.2023.06.037 ↗
34. Tensile deformation of low-density Fe–Mn–Al–C austenitic steels at ambient temperature10.1016/j.scriptamat.2012.09.031 ↗
35. Hydrogen-associated decohesion and localized plasticity in a high-Mn and high-Al two-phase lightweight steel10.1016/j.actamat.2022.118296 ↗
36. Effect of grain interior and grain boundary κ-carbides on the strain hardening behavior of medium-Mn lightweight steels10.1016/j.msea.2023.144861 ↗
37. Effects of TRIP and TWIP mechanisms on improved charpy impact energy of thick hot-rolled duplex lightweight steel plates10.1016/j.jmrt.2024.11.103 ↗
38. Ultrahigh strength in lightweight steel via avalanche multiplication of intermetallic phases and dislocation10.1016/j.actamat.2022.118436 ↗
39. Improved Mn–segregation bands and its influence on deformation behavior in a severely warm–rolled 10Mn lightweight steel10.1016/j.vacuum.2023.112428 ↗
40. The effects of partial recrystallization annealing and aging treatment on the microstructural evolution and mechanical behavior of austenitic lightweight steel10.1016/j.msea.2023.145602 ↗
41. A novel high-Mn duplex twinning-induced plasticity lightweight steel with high yield strength and large ductility10.1016/j.jmrt.2024.09.198 ↗
42. Ultrastrong and ductile martensitic low-density steel achieved by local strain partitioning into ferrite and delayed TRIP effect10.1016/j.jmst.2025.03.042 ↗
43. Enhancing strength-ductility synergy in low-Mn lightweight steel by large-deformed warm rolling and flash annealing10.1016/j.msea.2024.147129 ↗
44. Tailoring yield strength in Fe-20Mn-9Al-1.5C-3Cr-2Ni austenitic lightweight steels achieved by larger volume and size κ′-Carbide under extended aging10.1016/j.matlet.2024.137804 ↗
45. Grain refinement by intragranular nucleation of ferrite in a high nitrogen content vanadium microalloyed steel10.1016/j.scriptamat.2008.02.004 ↗
46. Optimizing the synergy of strength and ductility in a Fe–18Mn–8Al–1C–5Ni lightweight steel by adjusting the distribution, volume fraction and size of B2 phases and κ-carbides10.1016/j.jmrt.2024.12.047 ↗
47. Role of nanoscale ordering transformation in the design of a strong quadruplex lightweight steel10.1016/j.scriptamat.2025.116600 ↗
48. The synergy of strength and ductility in a hetero-structured lightweight steel with controlled distribution, size and volume fraction of B2 precipitates
49. Achieving superior strength-ductility balance in a novel heterostructured strong metastable β-Ti alloy10.1016/j.ijplas.2021.103126 ↗
50. Aged metastable high-entropy alloys with heterogeneous lamella structure for superior strength-ductility synergy10.1016/j.actamat.2020.08.043 ↗
51. Non-equiatomic FeMnCrNiAl high-entropy alloys with heterogeneous structures for strength and ductility combination10.1016/j.msea.2021.141386 ↗
52. Evolution of the microstructure and mechanical properties of an austenite–ferrite Fe–Mn–Al–C steel10.1016/j.msea.2015.07.043 ↗
53. Enhanced mechanical properties of Fe-Mn-Al-C low density steel via aging treatment10.3389/fmats.2021.680776 ↗
54. Characterization of microstructural evolution in austenitic Fe-Mn-Al-C lightweight steels with Cr content10.1016/j.matchar.2020.110717 ↗
55. Microstructure, mechanical properties and deformation behavior of Fe-28.7Mn-10.2Al-1.06C high specific strength steel10.3390/met12040602 ↗
56. Microstructure and mechanical properties of a Fe–28Mn–9Al-1.2C-(0, 3, 6, 9)Cr austenitic low-density steel10.1016/j.msea.2021.141583 ↗
57. Work hardening behavior involving the substructural evolution of an austenite-ferrite Fe-Mn-Al-C steel10.1016/j.msea.2015.05.108 ↗
58. Effect of Al and Mo on interplay of stacking fault energy and carbide formation in high-Mn steels for cryogenic applications10.1016/j.jmrt.2025.12.272 ↗
59. On the apparent stacking fault energy in austenitic steel: the effect of solute-dislocation interaction10.1016/j.scriptamat.2026.117457 ↗