Fatigue Behavior of Case Hardened, High Carbon Bainitic Steel

2001 ◽  
Author(s):  
M.R. Mitchell ◽  
Jon G. Flintoff ◽  
Mark M. Appleford ◽  
Suresh S. Babu
Keyword(s):  
Fatigue Behavior ◽  
Bainitic Steel ◽  
High Carbon

scholarly journals Shaping Microstructure and Mechanical Properties of High-Carbon Bainitic Steel in Hot-Rolling and Long-Term Low-Temperature Annealing

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 384
Author(s):  
Tomasz Dembiczak ◽  
Marcin Knapiński
Keyword(s):  
Mathematical Models ◽  
Hot Rolling ◽  
Constitutive Equations ◽  
Rolling Process ◽  
Bainitic Steel ◽  
Compression Tests ◽  
High Carbon ◽  
Bainite Steel ◽  
Dilatometric Studies

Based on the research results, coefficients in constitutive equations, describing the kinetics of dynamic, meta-dynamic, and static recrystallization in high-carbon bainitic steel during hot deformation were determined. The developed mathematical model takes into account the dependence of the changing kinetics in the structural size of the preliminary austenite grains, the value of strain, strain rate, temperature, and time. Physical simulations were carried out on rectangular specimens. Compression tests with a flat state of deformation were carried out using a Gleeble 3800. Based on dilatometric studies, coefficients were determined in constitutive equations, describing the grain growth of the austenite of high-carbon bainite steel under isothermal annealing conditions. The aim of the research was to verify the developed mathematical models in semi-industrial conditions during the hot-rolling process of high-carbon bainite steel. Analysis of the semi-industrial studies of the hot-rolling and long-term annealing process confirmed the correctness of the predicted mathematical models describing the microstructure evolution.

scholarly journals Influence of niobium microalloying on the microstructure and mechanical properties of high carbon nano bainitic steel

2019 ◽  
Vol 14 ◽  
pp. 729-737 ◽  
Author(s):  
P Ponguru Senthil ◽  
K Sudhakara Rao ◽  
Hillol Kumar Nandi ◽  
Vajinder Singh ◽  
Suraj Kumar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bainitic Steel ◽  
High Carbon ◽  
Niobium Microalloying ◽  
Microstructure And Mechanical Properties

Fatigue Behavior of Ferritic-Pearlitic-Bainitic Steel – Effect of Positive Mean Stress

2009 ◽  
Vol 417-418 ◽  
pp. 577-580
Author(s):  
Jaroslav Polák ◽  
Martin Petrenec
Keyword(s):  
Fatigue Life ◽  
Plastic Strain ◽  
Strain Amplitude ◽  
Fatigue Behavior ◽  
Cyclic Creep ◽  
Plastic Strain Amplitude ◽  
Fatigue Properties ◽  
Mean Stress ◽  
Bainitic Steel ◽  
The Mean

The fatigue properties of ferritic-pearlitic-bainitic steel using specimens produced from massive forging were measured in stress controlled regime with positive mean stress. The cyclic creep curves and cyclic hardening/softening curves were evaluated. The fatigue life was plotted in dependence on the mean stress and on the plastic strain amplitude. The principal contribution to the drop of the fatigue life with the mean stress is due to the increase of the plastic strain amplitude in cycling with mean stress.

A combined Tem/Apfim study of precipitation in ion-nitrided ultra-low carbon bainitic steel

1987 ◽  
Vol 45 ◽  
pp. 224-225
Author(s):  
M.G. Burke ◽  
E.J. Palmiere ◽  
A.J. DeArdo
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Surface Properties ◽  
Fatigue Behavior ◽  
Cost Effective ◽  
Nitriding Process ◽  
Bainitic Steel ◽  
Low Carbon ◽  
Ion Nitriding ◽  
Nitride Precipitation

Ion-nitriding represents an attractive and cost-effective process for improving the surface properties (hardness, wear resistance) and fatigue behavior of ultra-low carbon bainitic (ULCB) steels (1). Although the improvements in mechanical properties of nitrided steels are well-documented, precipitation in these steels during the nitriding process has not been studied extensively. The precipitation in ULCB steels is complex due to the presence of Mo, Mn, and Ni. Therefore, to investigate nitride precipitation in these steels, we have employed both TEM and APFIM in order to characterize the ultra-fine precipitates.The material employed in this study was a fully bainitic ULCB steel (0.021C- lMn- 1.4Ni- 1.5Mo- 0.016Ti- 0.05 2Nb -0.001B). Ion-nitriding was performed at 466°C for 14 hours using a mixture of 75% H2 - 25% N2 at a pressure of 2500 millitorr.

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