Characterization of hot deformation behavior of 410 martensitic stainless steel using constitutive equations and processing maps

Momeni, Amir; Dehghani, K.

doi:10.1016/j.msea.2010.05.079

Cited by 159 publications

(59 citation statements)

References 32 publications

(25 reference statements)

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“…An analysis on the stress curve suggested that DRV took place before the critical strain for initiation of DRX under all investigation conditions [6,8] . At high temperature, the DRV got prompted, and the DRX started at a lower strain and proceeded faster [7] .…”

Section: Microstructure Evolutionmentioning

confidence: 93%

“…At high temperature, the DRV got prompted, and the DRX started at a lower strain and proceeded faster [7] . Meanwhile, the fine and medium size particles that reduced the recovery process stabilized the substructure which would slow down the nucleation and pin the grain boundaries diminished to rare [8] . All the above factors gave explanations to the isometric martensitic grains deformed at 1200 ºC/10 -3 s -1…”

Section: Microstructure Evolutionmentioning

confidence: 99%

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The soften mechanisms of martensitic heat resistant steels during hot deformation

Zhang

Liu

Yao

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Hot deformations for the experimental steels were carried out in the temperature range of 900-1200 ºC and the strain rate range 10-3-100 s-1. In this study, the critical condition for dynamic recrystallization (DRX) was determined by a cooperation of the minimum value of -(∂θ/∂σ) and the deviation point of the linear slope of θ-σ curve. From the analysis, it was found that only one slope ratio of critical strain, ε c versus critical stress, σ c appeared in the 9Cr and 10Cr steels , whilst two different slopes in P92 and NS steels due to the augmentation of auxiliary softening effect of the dynamic strain-induced transformation (DSIT) . The results also exhibited that ln(Z) kept an approximate positive linear relationship with ln(ε c ) below the value of 40, but barely changed beyond it. However, the ln(σ c ) value increased continuously with the rise of the ln(Z) value at a smaller growth rate after the value of ln(Z) reached 40 than that of the initial part.

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Section: Microstructure Evolutionmentioning

confidence: 93%

Section: Microstructure Evolutionmentioning

confidence: 99%

The soften mechanisms of martensitic heat resistant steels during hot deformation

Zhang

Liu

Yao

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…Arrhenius equation is widely used to describe relationships between the strain rate, the flow stress, and temperature (Ref [16][17][18]. The equation can be written as…”

Section: Constitutive Analysismentioning

confidence: 99%

Effects of Ce Addition on High Temperature Deformation Behavior of Cu-Cr-Zr Alloys

Zhang

Tran

Chai

et al. 2015

J. of Materi Eng and Perform

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Hot deformation behavior of the Cu-Cr-Zr and Cu-Cr-Zr-Ce alloys was investigated by compressive tests using the Glee-ble-1500D thermomechanical simulator at 650-850°C and 0.001-10 s 21 strain rate. The flow stress decreased with the deformation temperature at a given stain rate. However, the flow stress increased with the strain rate at the same deformation temperature. The constitutive equations for two kinds of alloys were obtained by correlating the flow stress, the strain rate and temperature using stepwise regression analysis. The addition of Ce can refine the grain and effectively accelerate dynamic recrystallization. The processing maps were established, based on the dynamic material model. Instability zones in the flow behavior can be easily recognized. Hot deformation optimal processing parameters were obtained in the range of this experiment. The hot deformation characteristics and microstructure were also analyzed by the processing maps. The addition of Ce can optimize hot workability of the Cu-Cr-Zr alloy.

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“…It is wellknown that hot workability of a metal is deteriorated in the presence of various deformation defects such as microcracking, flow oscillation and micro void coalescence while dynamic restoration processes such as dynamic recovery (DRV) and dynamic recrystallization (DRX) can cope with the effect of such defects. 4) In recent years, the use of processing maps has been widely accepted to optimize the hot workability and control the microstructure of the material without using expensive and time-consuming trial and error methods. The processing map developed by Prasad et al is based on the theory of the Dynamic Material Model (DMM).…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior of High Mn TWIP Steel Using the Processing Map

et al. 2015

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Hot deformation behavior of 30Mn-0.5C-3.7Al-4Si TWIP steel was investigated in this study. Cylindrical specimens were used for hot compression tests at temperatures ranging from 750 to 1 000°C and the strain rate range of 0.001-0.5 s −1 . The effect of temperature and strain rate on the flow curves was addressed. Then, processing maps of hot deformation of the steel at the selected strains of 0.5 and 0.6 were developed. In addition, standard metallography procedures were conducted on the specimens after the hot compression tests. The generated processing maps indicated that there were only one unstable region and two stable regions in which dynamic recrystallization occurred. In addition, power dissipation was generally decreased with increasing the strain, while stability flow zone was gradually expanded. In the stable region, the dynamic recrystallization zone with a maximum efficiency 0.35 at a temperature of about 1 000°C and the strain rate 0.1 s −1 was enlarged with increasing the strain up to 0.6. Finally, an optimum hot working condition for the TWIP steel was predicted from the processing maps.

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Characterization of hot deformation behavior of 410 martensitic stainless steel using constitutive equations and processing maps

Cited by 159 publications

References 32 publications

The soften mechanisms of martensitic heat resistant steels during hot deformation

The soften mechanisms of martensitic heat resistant steels during hot deformation

Effects of Ce Addition on High Temperature Deformation Behavior of Cu-Cr-Zr Alloys

Hot Deformation Behavior of High Mn TWIP Steel Using the Processing Map

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