Prediction of high temperature flow stress in 9Cr–1Mo ferritic steel during hot compression

Krishnan, S.A.; Phaniraj, C.; Ravishankar, C.; Bhaduri, A.K.; Sivaprasad, P.V.

doi:10.1016/j.ijpvp.2011.07.009

Cited by 34 publications

(18 citation statements)

References 18 publications

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“…Recent studies [8][9][10][11][12][13][14][15][16] show that the sine-hyperbolic expression can be employed for predicting flow stress at different strains with the purpose of developing a strain dependent constitutive equation, because in most of the forming processes, strain is a controlling parameter. For such a strain dependent constitutive analysis in P91 steel, a new relationship between the stress multipliers of Garofalo sine-hyperbolic equation has been proposed by Phaniraj et al [15].…”

Section: Introductionmentioning

confidence: 99%

Resisting stress for constitutive analysis of hot deformation in modified 9Cr–1Mo (P91) steel

Samantaray

Phaniraj

Bhaduri

et al. 2013

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Resisting stress for constitutive analysis of hot deformation in modified 9Cr–1Mo (P91) steel

Samantaray

Phaniraj

Bhaduri

et al. 2013

Materials Science and Engineering: A

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“…Thus, the preciseness of any FE-based modelling largely depends on the accuracy of the framed or chosen constitutive equations for predicting the flow behaviour of the materials at different strain rates. Constitutive equations are often used to represent flow behaviours of the metallic materials that can be used in the finite element method (FEM) simulations to model the material's response under quantified loading conditions [209,210]. Constitutive models correlate the flow stress with the strain, strain rate, and temperature of the material.…”

Section: Numerical Modellingmentioning

confidence: 99%

Structure–Property Correlation and Constitutive Description of Structural Steels during Hot Working and Strain Rate Deformation

Prusty

Banerjee

2020

Materials

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The behaviour of plain carbon as well as structural steels is qualitatively different at different regimes of strain rates and temperature when they are subjected to hot-working and impact-loading conditions. Ambient temperature and carbon content are the leading factors governing the deformation behaviour and substructural evolution of these steels. This review aims at investigating the mechanical behaviour of structural (or constructional) steels during their strain rate (ranging from very low to very high) as well as hot-working conditions and subsequently establishing the structure–property correlation. Rate-dependent constitutive equations play a significant role in predicting the material response, particularly where the experiments are difficult to perform. In this article, an extensive review is carried out on the merits and limitations of constitutive models which are commonly used to model the deformation behaviour of plain carbon steels.

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“…In order to promote the practical application of numerical analysis on hot forging and investigate the effect of strain on hot deformation behavior, it is necessary to improve the accuracy of prediction flow stress. So, a set of parameters of Q, n, A and α can be calculated as polynomial function with strain in the range of 0 ~ -0.9 and the interval of -0.1 using the aforementioned method, as show in Equation 13. The relationship between Q, n, A, α and strain can be polynomial fitting as shown in Figure 5, and the coefficients of the polynomial function can be easily obtained by polynomial fitting method shown in Table 1 …”

Section: Compensation Of Strainmentioning

confidence: 99%

“…Lin et al proposed a revised hyperbolic sine constitutive equation, in which the influence of strain was incorporated by considering the effect of strain to predict the flow stress of 42CrMo steel [9][10][11] . Later, the improved Arrhenius-type equation was effective for describing the high temperature flow behaviors of cast A356 aluminum alloy 12 , 9Cr-1Mo ferritic steel 13 , Ti-6Al-4V alloy 14 , T24 steel [15][16] . However, the hot compression deformation behavior of cast AZ80 magnesium alloys needs further investigating to realize the effect of strain.…”

Section: Introductionmentioning

confidence: 99%

The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy

Quan

Shi

et al. 2013

Mat. Res.

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In order to study the hot working behaviour of as-cast AZ80 magnesium alloy, a series of isothermal upsetting tests with height reduction of 60% were performed at the temperature range of 523-673 K and the strain rate range of 0.01-10 s -1 on a servo-hydraulic Gleeble-1500 machine simulator. Based on the regression analysis for Arrhenius type equation of flow stress, the activation energy of deformation was determined to be Q = 168.6606 KJ·mol -1 , and material constants A, n and α in the equation also were calculated respectively to predict the peak stress during hot deformation. A 7 th order polynomial was used to represent the influence of strain on these parameters (i.e Q, lnA, n and α). The Arrhenius equation was further developed by taking account of the effect of strain on the flow stress to describe the flow behavior during the whole experimental temperature and strain rate range. Then comparison between the predicted results and test results shows that the correlation coefficient and average absolute relative error is 0.99 and 6.63%, respectively. The flow stress predicted by developed equation can give an accurate and precise description of the flow behaviour for AZ80 magnesium alloy.

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Prediction of high temperature flow stress in 9Cr–1Mo ferritic steel during hot compression

Cited by 34 publications

References 18 publications

Resisting stress for constitutive analysis of hot deformation in modified 9Cr–1Mo (P91) steel

Resisting stress for constitutive analysis of hot deformation in modified 9Cr–1Mo (P91) steel

Structure–Property Correlation and Constitutive Description of Structural Steels during Hot Working and Strain Rate Deformation

The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy

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