Microstructure evolution and mechanical properties in multi-phase composite nanobainitic steel via isothermal treatment
Source abstract
Abstract
This study investigates the effects of different low-temperature austempering temperature and time on the phase fraction, morphology, distribution of microstructures and mechanical properties in 67Si2CrNiAlMnMoCu steel. The results indicate that the specimen austempered at 200 °C exhibits the earliest transformation due to the pre-forming martensite acting as nucleation for bainitic transformation and the lath martensite disappears as the austempering temperature and time increasing. The M/A islands decrease slightly in size and exhibit markedly less surface relief when specimen austempered at 240 °C from 9 h to 21 h. In addition, the product of strength and ductility of austempered specimens are all higher than the oiled specimens, especially the specimen austempered at 200 °C for 21 h is ∼1.5 times higher than the oiled one. The impact toughness of the specimen austempered at 240 °C for 21 h is nearly 12 times higher than that of austempered at 200 °C for 3h.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Surface Treatment and Residual Stress · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (50)
Show source-provided references
1. Mechanical behaviour and microstructural characteristics of high-silicon ultra-strong bainitic steels for hot rolling practice10.1016/j.msea.2025.148236 ↗
2. Bhadeshia · 2019
3. Study on kinetics of transformation in medium carbon steel bainite at different isothermal temperatures10.3390/ma14112721 ↗
4. On structure-property relationship in nanostructured bainitic steel subjected to the quenching and partitioning process10.1016/j.msea.2016.03.006 ↗
5. Extremely high strength achievement in medium-C nanobainite steel10.1016/j.scriptamat.2018.04.005 ↗
6. Microstructures and properties of a novel carburizing nanobainitic bearing steel10.1016/j.msea.2020.139086 ↗
7. Microstructure evolution of carbide-free bainitic steels under abrasive wear conditions
8. Achieving ultrafine martensite-bainite duplex microstructure10.1016/j.jmrt.2025.05.094 ↗
9. Acceleration of nanobainite transformation by multi-step ausforming process10.1016/j.scriptamat.2015.05.023 ↗
10. New insights to the effects of ausforming on the bainitic transformation10.1016/j.msea.2014.12.043 ↗
11. Accelerating nano-bainite transformation based on a new constructed microstructural predicting model10.1016/j.msea.2019.01.061 ↗
12. Nanoscale microstructural characterization of ananobainitic steel10.1016/j.actamat.2011.05.024 ↗
13. Effect of austenite grain size on transformation of nanobainite and its mechanical properties10.1016/j.msea.2016.04.041 ↗
14. Innovative processing of obtaining nanostructured bainite with high strength-high ductility combination in low-carbon-medium-Mn steel: process-structure-property relationship10.1016/j.msea.2018.01.120 ↗
15. Effects of austempering temperature on bainitic microstructure and mechanical properties of a high-C high-Si steel10.1016/j.msea.2018.11.004 ↗
16. Temperature dependence of the deformation behavior and mechanical properties of a Fe-Mn-Al-C low-density steel for cryogenic application10.1016/j.jmrt.2024.10.063 ↗
17. Investigating the performance evaluation of Cu-Cr tool fabricated by powder metallurgy during electrical discharge machining of EN9 steel10.1108/WJE-03-2023-0073 ↗
18. Effect of tempering upon the tensile properties of a nanostructured bainitic steel10.1016/j.msea.2014.07.097 ↗
19. Combining in-situ technology to study the influence of medium-carbon bainitic steel10.1016/j.jmrt.2025.03.106 ↗
20. Role of nano bainite laths and nanosized precipitates: strengthening a low-alloy steel to 1870MPa10.1016/j.jmrt.2024.09.230 ↗
21. The effect of morphology on the stability of retained austenite in a quenched and partitioned steel10.1016/j.scriptamat.2012.11.003 ↗
22. Improving strength and ductility via ausforming combined with austempering through deformation-induced bainite refinement10.1016/j.jmrt.2024.04.252 ↗
23. Microstructural evolution and kinetics of the bainite transformation in a silicon-alloyed medium-carbon steel via two-step quenching and partitioning treatment10.1016/j.jmrt.2025.09.132 ↗
24. Microstructure evolution of medium-manganese Al-alloyed steel manufactured by double-step intercritical annealing: effects of heating and cooling rates10.1016/j.matchar.2023.112816 ↗
25. Effects of above- or below-Ac3 austenitization on bainite transformation behavior, microstructure and mechanical properties of carbide-free bainitic steel10.1016/j.msea.2023.145814 ↗
26. Direct and indirect decomposition of retained austenite in continuously cooled bainitic steels: influence of vanadium10.1016/j.matchar.2021.110922 ↗
27. Effect of austempering on mechanical properties of Nb/V microalloyed bainitic bearing steel10.3390/cryst12071001 ↗
28. Effect of N content on microstructure and properties of bainite steel for V microalloyed springs10.1016/j.jmrt.2025.02.232 ↗
29. Bainite nucleation mechanism and mechanical properties in low carbon bainite deposited metals with different nickel additions10.1016/j.msea.2022.144036 ↗
30. Improving strength-toughness of low carbon bainitic microalloyed steel via tailoring isothermal quenching process and niobium microalloying10.1016/j.msea.2024.146515 ↗
31. Progress in epitaxial thin‐film Na3Bi as a topological electronic material10.1002/adma.202005897 ↗
32. Enabling strong and formable advanced high-strength steels through inherited homogeneous microstructure10.1016/j.scriptamat.2025.116560 ↗
33. Borgenstam · 2012
34. Structure-properties relationship in TRIP steels containing carbide-free bainite10.1016/j.cossms.2004.10.002 ↗
35. Effect of martensite pre-quenching on bainite transformation kinetics, martensite/bainite duplex microstructures, mechanical properties and retained austenite stability of GCr15 bearing steel10.1016/j.jmrt.2021.09.070 ↗
36. Investigation of microstructural evolution and bainite transformation kinetics of multi-phase steel10.1016/j.msea.2019.138868 ↗
37. Temperature increases and thermoplastic microstructural evolution in adiabatic shear bands in a high-strength and high-toughness 10 wt.% Ni steel
38. Uncovering the influence of common nonmetallic impurities on the stability and strength of a Σ5 (310) grain boundary in Cu10.1016/j.actamat.2018.01.058 ↗
39. Influence of composition and precipitation evolution on damage at grain boundaries in a crept polycrystalline Ni-based superalloy10.1016/j.actamat.2018.12.039 ↗
40. Additively manufacturable high-strength aluminum alloys with thermally stable microstructures enabled by hybrid machine learning-based design
41. Study of bainite and martensite tempering in a medium C high Si steel. microstructural disparities and equilibrium convergence10.1016/j.jmrt.2024.08.141 ↗
42. Ductilization of high carbon, high silicon carbide-free nanostructured bainitic steel10.1016/j.msea.2022.144318 ↗
43. Theory of transformation-mediated twinning10.1093/pnasnexus/pgac282 ↗
44. Analysis of continuous cooling transformation and microstructure regulation of 900 MPa grade high-strength steel
45. Stabilization of mechanical strength in a nanocrystalline CoCrNi concentrated alloy by nitrogen alloying10.1016/j.msea.2024.147757 ↗
46. Design, fabrication and characterization of FeAl-based metallic-intermetallic laminate (MIL) composites10.1016/j.actamat.2019.06.039 ↗
47. Nanoscale austenite reversion through partitioning, segregation and kinetic freezing: example of a ductile 2GPa Fe–Cr–C steel10.1016/j.actamat.2012.01.045 ↗
48. A novel design to enhance the amount of retained austenite and mechanical properties in low-alloyed steel10.1016/j.scriptamat.2014.06.014 ↗
49. A general perspective of Fe–Mn–Al–C steels10.1007/s10853-018-2551-6 ↗
50. Phase stability of ternary fcc and bcc Fe-Cr-Ni alloys10.1103/PhysRevB.91.024108 ↗