Hot deformation behaviour and Hansel-Spittel constitutive model of Cr5 alloy for heavy backup roll

Chen, Xuewen; Wang, Nana; Ma, Xiang; Zhou, Huijun

doi:10.1504/ijcmsse.2018.095321

Cited by 7 publications

(5 citation statements)

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“…The diameter and initial height of the billet were 8 and 12 mm, respectively. The Hansel–Spittel constitutive model of Cr5 alloy steel was used in the simulation calculation, as established by the author in the previous study [ 45 ] and shown in Equation (12). Other simulation parameters are shown in Table 2 .…”

Section: Experiments Results Analysis Of Cr5 Alloy Steelmentioning

confidence: 99%

“…The diameter and initial height of the billet were 8 and 12 mm, respectively. The Hansel-Spittel constitutive model of Cr5 alloy steel was used in the simulation calculation, as established by the author in the previous study [45] and shown in Equation (12). Other simulation parameters are shown in Table 2 The non-uniformity deformation and temperature fields of a material during hot processing undoubtedly increase the difficulty of the application of the hot processing maps.…”

Section: Hot Formability Analysis Of Cr5 Alloy Steel By Coupled 3d Ho...mentioning

confidence: 99%

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Hot Formability Study of Cr5 Alloy Steel by Integration of FEM and 3D Processing Maps

Chen

Bai

et al. 2022

Materials

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Microstructure is an important factor that affects the mechanical properties and service life of forgings. Through the full study of the formability of the material, the internal microstructure of the material can be effectively controlled. In order to accurately describe the formability of materials during thermal processing, 3D hot processing maps containing strains were established in this paper, and the 3D hot processing maps were coupled with the finite element method for simulation calculation. The Cr5 alloy steel was subjected to unidirectional thermal compression at a strain rate of 0.005–5 s−1 and temperature range of 900–1200 °C on a Gleeble-1500D thermal simulation machine, in order to obtain the date of true stress and strain. Based on the dynamic material model (DMM), the 3D processing maps of Cr5 alloy steel was established, and the 3D processing maps were associated with the analysis of microstructure evolution during hot deformation. The results show that the optimum thermal deformation conditions are as follows: temperature of 1000–1125 °C, strain rate of 0.01–0.2 s−1, and peak power dissipation of 0.41. The 3D processing maps were coupled with the finite element software FORGE® to simulate the hot working process, and the distribution and change of power dissipation and flow instability domain on the metal deformation under different thermal deformation conditions were obtained. The comparison between the simulation results and metallographic images of typical regions of metal deformation shows that they are in good agreement. This method can effectively predict and analyze the formability of materials during hot processing and provide guidance for practical industrial production.

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Section: Experiments Results Analysis Of Cr5 Alloy Steelmentioning

confidence: 99%

Section: Hot Formability Analysis Of Cr5 Alloy Steel By Coupled 3d Ho...mentioning

confidence: 99%

Hot Formability Study of Cr5 Alloy Steel by Integration of FEM and 3D Processing Maps

Chen

Bai

et al. 2022

Materials

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“…The default thermal deformation constitutive model of QFORM extrusion software is the Hansel-Spittel model, as shown in Formula (1). Based on the data obtained from isothermal hot compression tests, the thermal deformation constitutive equation can be fitted [20,21], and the actual parameters of the constitutive model under specific alloy composition conditions can be calculated, as shown in Table 2. The solid line curve in Figure 4 represents the predicted values of the thermal deformation constitutive equation.…”

Section: Constitutive Equation Of 6061 Alloy With a Specific Composit...mentioning

confidence: 99%

Multi-Objective Optimization of a Multi-Cavity, Significant Wall Thickness Difference Extrusion Profile Mold Design for New Energy Vehicles

Xu,

Jiang,

et al. 2024

Materials

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With the rapid development of the new energy vehicle market, the demand for extruded profiles for battery trays, mainly characterized by significant wall thickness differences in multiple chambers, is increasing, posing new challenges to production and quality control. This study examines the multi-objective optimization problem in the design process of aluminum profile dies with multi-cavity profiles and significant wall thickness differences. Using QFORM-extrusion professional aluminum extrusion finite element analysis software and the response surface analysis method, the standard deviation of the velocity (SDV), standard deviation of the pressure (SDP), and thick wall hydrostatic pressure (TWHP) on the profile section at the die exit are optimized. By analyzing the functional relationship between the key die structure parameters (the height of the baffle plates, the length of the bearing, and the height of the false mandrel) and the optimization objective, the optimal combination scheme of die structure parameters was obtained using the NSGA2 (non-dominated sorting genetic algorithm-2) multi-objective genetic optimization algorithm. The results show that, compared with the initial design scheme, the standard deviation of profile section velocity was reduced by 5.33%, the standard deviation of pressure was reduced by 11.16%, and the thick wall hydrostatic pressure was increased by 26.47%. The die designed and manufactured using this scheme successfully completed the hot extrusion production task, and the profile quality met the predetermined requirements, thus verifying the effectiveness of this study in optimizing the design of a multi-cavity aluminum profile die with significant differences in wall thickness for complex structures.

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“…It could be used to describe the relationship between the flow stress σ, strain rate . ε, strain ε and deformation temperature T. The model proposed by Hansel and Spittel is given as [32]:…”

Section: Hansel-spittel Modelmentioning

confidence: 99%

Development and Application of High-Temperature Constitutive Model of HNi55-7-4-2 Alloy

Qiang

Liu

et al. 2020

Metals

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The constitutive model is still not available for theoretical and engineering analysis of HNi55-7-4-2 alloy, which is a new type of wear-resistant brass alloy widely applied to car synchronizer rings and ship condenser tubes etc. In the current investigation, a friction-corrected stress-strain curve was obtained through a hot-compression test to develop the high-temperature constitutive model of HNi55-7-4-2 alloy based on the Hansel–Spittel model. By comparing predicted flow stress and a simulated force-stroke curve with experimental results, the proposed constitutive model was verified. The developed constitutive model was applied to numerically simulate the hot precision forging of a synchronizer ring. The simulation results based on two process plans on material flow and forging defects were validated by process experiment. The Hansel–Spittel high-temperature constitutive model proposed in this work enables the theoretical and engineering analysis of HNi55-7-4-2 alloy.

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Hot deformation behaviour and Hansel-Spittel constitutive model of Cr5 alloy for heavy backup roll

Cited by 7 publications

References 0 publications

Hot Formability Study of Cr5 Alloy Steel by Integration of FEM and 3D Processing Maps

Hot Formability Study of Cr5 Alloy Steel by Integration of FEM and 3D Processing Maps

Multi-Objective Optimization of a Multi-Cavity, Significant Wall Thickness Difference Extrusion Profile Mold Design for New Energy Vehicles

Development and Application of High-Temperature Constitutive Model of HNi55-7-4-2 Alloy

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