Hot Tensile and Fracture Behavior of 35CrMo Steel at Elevated Temperature and Strain Rate

Xiao, Zhengbing; Huang, Yuanchun; Liu, Hui; Wang, Sanxing

doi:10.3390/met6090210

Cited by 21 publications

(13 citation statements)

References 27 publications

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“…35CrMo steel is an extensively used material for gears, bearings, transmission shafts, and many more, due to its excellent mechanical properties . However, in conventional hot rolling and heat‐treatment processes, some of the carbon in the surface layer may be consumed by the reaction with oxygen, if oxygen is available, and the steel will undergo microstructural changes.…”

Section: Introductionmentioning

confidence: 99%

Temperature Dependence and Formation Mechanism of Surface Decarburization Behavior in 35CrMo Steel

Duan

Lü

et al. 2019

steel research int.

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Herein, the temperature dependence and formation mechanism of surface decarburization behavior are researched for 35CrMo steel in the temperature range of 710–950 °C. In view of the three transformation temperatures A1, A3, and TG (the A3 temperature for pure iron), the decarburized microstructural characteristics can be divided into four types: nondecarburization, complete decarburization, complete and partial decarburizations, and partial decarburization. The absolute thickness of the total decarburization layer is the sum of the thicknesses of oxide layer, complete decarburization layer, and partial decarburization layer, and it follows an exponential relationship with the temperature. The absolute thickness of complete decarburization layer, including the thicknesses of the oxide layer and the visible complete decarburization layer, decreases with increasing temperature. In the temperature range of A1–A3, the complete decarburization rate is primarily controlled by the austenitization degree and the diffusivity of carbon in ferrite and austenite, whereas in the temperature range of A3–TG, it can be jointly controlled by the decarburized incubation time in single‐phase austenite and the duration holding in the α + γ phase field.

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Section: Introductionmentioning

confidence: 99%

Temperature Dependence and Formation Mechanism of Surface Decarburization Behavior in 35CrMo Steel

Duan

Lü

et al. 2019

steel research int.

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“…Hot forming processes, such as superplastic forming [4], quick plastic forming [5], and hot form and quench [6,7], have been developed to manufacture components with complex shapes and high dimensional accuracy. However, the material flow behavior is often complex during hot deformation, which is significantly affected by processing parameters, i.e., the strain, strain rate, and temperature [8,9]. A thorough study is necessary for researchers to have a better understanding of hot deformation behaviors to improve the forming processes.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior of a 2024 Aluminum Alloy Sheet and its Modeling by Fields-Backofen Model Considering Strain Rate Evolution

Zhang

Wang

Lin

et al. 2019

Metals

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The deformation behavior of a 2024 aluminum alloy sheet at elevated temperatures was studied by uniaxial hot tensile tests over the nominal initial strain rate range of 0.001–0.1 s−1 and temperature range of 375–450 °C. In order to analyze the deformation behavior with higher accuracy, a digital image correlation (DIC) system was applied to determine the strain distribution during hot tensile tests. Local stress-strain curves for different local points on the specimens were calculated. The strain rate evolution of each point during the tensile tests was investigated under different deformation conditions. Then, an improved Fields–Backofen (FB) model, taking into account the local strain rate evolution instead of the fixed strain rate, was proposed to describe the constitutive behaviors. It has been found that obvious non-uniform strain distribution occurred when the true strain was larger than 0.3 during hot tensile tests. The strain rate distribution during deformation was also non-uniform. It showed increasing, steady, and decreasing variation tendencies for different points with the increasing of strain, which led to the local flow stress being different at different local points. The flow stresses predicted by the improved FB model showed good agreement with experimental results when the strain rate evolutions of local points during tensile tests were considered. The prediction accuracy was higher than that of traditional FB models.

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“…e hot tensile tests of 35CrMo steel are only found in Xiao's study. Xiao et al [28] studied the hot tensile and fracture behaviors of 35CrMo steel at high temperatures and strain rates. However, the initiation and propagation of cracks under different strain and stress states have not been reported.…”

Section: Introductionmentioning

confidence: 99%

Influence of Strain and Stress Triaxiality on the Fracture Behavior of GB 35CrMo Steel during Hot Tensile Testing

Zhou

Wang

2018

Advances in Materials Science and Engineering

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To better understand cavitation nucleation and crack initiation in 35CrMo steel during high-temperature tensile processing and the effect of stress triaxiality on its fracture behaviors, uniaxial and notch high-temperature tensile tests were performed. The microstructure, fracture morphology, fracture strain, and stress triaxiality of the tested 35CrMo steel were then characterized and discussed. The results showed that crack formation in 35CrMo steel included stages of nucleation, growth, and microcavity aggregation. Scanning electron microscopy and energy-dispersive X-ray spectroscopy demonstrated that crack formation was closely related to the presence of steel inclusions. High-temperature tensile testing of samples with different notch radii showed that the fracture strain of 35CrMo steel was decreased with increasing stress triaxiality, that is, increased stress levels corresponded to decreased material plasticity. In addition, the recrystallization degree was decreased with increased stress triaxiality, and the grain size growth was slowed. The failure of 35CrMo steel occurred via ductile fracture, and low stress triaxiality, and high temperature conditions induced large and deep dimples on the fracture surface.

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Hot Tensile and Fracture Behavior of 35CrMo Steel at Elevated Temperature and Strain Rate

Cited by 21 publications

References 27 publications

Temperature Dependence and Formation Mechanism of Surface Decarburization Behavior in 35CrMo Steel

Temperature Dependence and Formation Mechanism of Surface Decarburization Behavior in 35CrMo Steel

Hot Deformation Behavior of a 2024 Aluminum Alloy Sheet and its Modeling by Fields-Backofen Model Considering Strain Rate Evolution

Influence of Strain and Stress Triaxiality on the Fracture Behavior of GB 35CrMo Steel during Hot Tensile Testing

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