Study on hot deformation behaviour and processing maps of low carbon bainitic steel

Yang, Zhinan; Zhang, Fucheng; Chen, Zheng; Zhang, Ming; Lv, Bo; Qu, Lin

doi:10.1016/j.matdes.2014.10.068

Cited by 78 publications

(39 citation statements)

References 31 publications

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“…The modified Zerilli-Armstrong models were successfully developed to predict hot deformation behaviour of 20CrMo alloy steel by He et al 19 . Also, Yang et al 20 established a constitutive model of low carbon bainitic steel.…”

Section: Introductionmentioning

confidence: 99%

Identification for the Optimal Working Parameters of Ti-6Al-4V-0.1Ru Alloy in a Wide Deformation Condition Range by Processing Maps Based on DMM

et al. 2016

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The hot deformation behaviours of Ti-6Al-4V-0.1Ru alloy were investigated by isothermal hot compression tests in the temperature range of 1023-1423 K and strain rate range of 0.01-10 s -1 . The β transus was determined to be 1198 K by continuous heating method. The values of deformation activation energy Q at the strain of 0.3 were calculated to be 630.01 kJ/mol in dual-phase field and 331.75 kJ/mol in β-phase field. Moreover, the processing maps at the strain of 0.2, 0.4, 0.6 and 0.8 were developed based on dynamic materials model (DMM). To deeply understand the microstructure evolution mechanism during hot deformation processes and to verify the processing maps, the microstructures at different deformation conditions were observed. The stable microstructures (i.e. globularization, dynamic recovery (DRV) and β dynamic recrystallization (β-DRX)) and instable microstructures (i.e. lamellae kinking and flow localization) were obtained. To make it useful in the design of industrial hot working schedules for this material, a microstructural mechanism map was constructed on the basis of processing maps and microstructure observation.

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Section: Introductionmentioning

confidence: 99%

Identification for the Optimal Working Parameters of Ti-6Al-4V-0.1Ru Alloy in a Wide Deformation Condition Range by Processing Maps Based on DMM

et al. 2016

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“…Previous researches [4][5][6][7][8] showed that the strain rate, deformation temperature and excursion strain served the primary roles in tuning the microstructures and mechanical properties of forged superalloys. Over the past 30 years, the processing map had been well established as an effective technique to understand hot working behavior of numerous materials [9][10][11][12][13][14][15] and nickel-based superalloys using hot compression and hot torsion, for example: Rene 95 [1], IN-625 [3], IN-718 [16], NIMONIC AP-1 [17], IN-100 [18], FGH96 [19], IN-939 [20], and others [21][22][23]. In this article, we focused on the deformation behaviors of a new designed P/M nickel-based superalloy.…”

Section: Introductionmentioning

confidence: 99%

Characterization of hot compression behavior of a new HIPed nickel-based P/M superalloy using processing maps

Liu

et al. 2015

Materials & Design

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“…Zhinan Yang et al determined the expanded instability region of the low carbon bainitic steel, 29εnSiCrAlNiεo, by constructing the processing maps at different strains and optimized the processing parameters by combining the processing maps with microstructural observation [8]. Yang Cheng et al studied the metadynamic recrystallization(εDRX) behavior and characteristics of HR3C austenitic heat-resistant stainless steel by combining the kinetic equations of εDRX and hot processing maps and obtained the stability domain [9].…”

Section: Ironmaking and Steel Making W Feng F Qin And H Long (2016)mentioning

confidence: 99%

“…The instability region exists at the temperature range of 850~997ºC and the strain rate range of 0.013~1s -1 , and at the temperature range of 850~898ºC and the strain rate range of 0.077~1s -1 and at the temperature range of 850~891ºC and the strain rate range of 0.169~1s -1 , and at the temperature range of 850~950ºC and the strain rate range of 0.38~1s -1 , and at the temperature range of 850~971ºC and the strain rate range of 0.371~1s -1 at the strain of 0.4, 0.6, 0.8, 0.916, respectively. These instability regions are considered as unsafe deformation zones, which resulted from deformation defects, such as flow localization, adiabatic shear band and cracking [8,16] and should be avoided during hot forming of 20CrεnTiH steel.…”

Section: Safe Region and Instability Regionmentioning

confidence: 99%

“…6(c) and (d). Generally, DRX is very limited at low temperature and adiabatic heating is difficult to be conducted at high strain rate due to a shorter deformation time, which can result in flow localization [8,11]. Fig.7 shows the microstructure characteristics of the deformed samples at different working conditions at the strain 0.916.…”

Section: Validation Of Processing Mapsmentioning

confidence: 99%

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Hot workability analysis and processing parameters optimisation for 20CrMnTiH steel by combining processing map with microstructure

Feng

Qin

Long

2016

Ironmaking & Steelmaking

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The processing map of 20CrMnTiH steel is developed by using the dynamic material model according to the hot compression experiments, performed on a Gleeble-3500 thermal simulator at the temperature range of 850-1150°C and the strain rate of 0.01-1 s −1 . Hot workability characteristics of 20CrMnTiH steel are analysed based on the developed processing map. The safe deformation regions with higher power dissipation efficiency η exhibit the dynamic recrystallisation (DRX) mechanism and show fine and homogeneous microstructure. The unstable regions with negative instability coefficient ξ occur at both lower temperature with all strain rates and at high temperature with high strain rate at the strain of 0.2. The area of instability gradually decreases with the increasing strain and only appears at lower temperature and higher strain rate when the strain is above 0.2. The unstable regions indicate the flow localisation by microstructure analysis. Combining with the developed processing map with DRX behaviour, the optimal values of hot processing parameters for 20CrMnTiH steel are obtained to achieve good hot workability and small grains sizes at the process parameters ranged at 1036-1070°C/0.1-1 s −1 and 918-985°C/0.01-0.014 s −1 .

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Study on hot deformation behaviour and processing maps of low carbon bainitic steel

Cited by 78 publications

References 31 publications

Identification for the Optimal Working Parameters of Ti-6Al-4V-0.1Ru Alloy in a Wide Deformation Condition Range by Processing Maps Based on DMM

Identification for the Optimal Working Parameters of Ti-6Al-4V-0.1Ru Alloy in a Wide Deformation Condition Range by Processing Maps Based on DMM

Characterization of hot compression behavior of a new HIPed nickel-based P/M superalloy using processing maps

Hot workability analysis and processing parameters optimisation for 20CrMnTiH steel by combining processing map with microstructure

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