Hall-Petch relationship of interstitial-free steel with a wide grain size range processed by asymmetric rolling and subsequent annealing

Fu, Bin; Pei, Chenghao; Pan, Hongbo; Guo, Yanhui; Fu, Liming; Shan, Aidang

doi:10.1088/2053-1591/abc79f

Cited by 12 publications

(4 citation statements)

References 37 publications

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“…Similarly, the calculations were performed for the ultimate tensile strength (UTS) values. The values of flow stress at a specific strain [ 33 ] and especially UTS [ 34,35 ] might conform to the Hall–Petch relationship over the whole range of grain size. Using the UTS formula of

{UTS}_{γ} = 565.8 + 191 / \sqrt{D_{γ}}

for AISI 316 stainless steel, the following equation was obtained

UTS = {565.8 + 191 / \sqrt{D_{γ}}} f_{γ} + {600.73 + 821.94 / \sqrt{D_{α}}} f_{α}

…”

Section: Resultsmentioning

confidence: 99%

Detailed Hall–Petch Analysis of Cold Rolled and Annealed Duplex 2205 Stainless Steel

Geshani

Mirzadeh

Sohrabi

2022

steel research int.

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{UTS}_{γ} = 565.8 + 191 / \sqrt{D_{γ}}

for AISI 316 stainless steel, the following equation was obtained

UTS = {565.8 + 191 / \sqrt{D_{γ}}} f_{γ} + {600.73 + 821.94 / \sqrt{D_{α}}} f_{α}

…”

Section: Resultsmentioning

confidence: 99%

Detailed Hall–Petch Analysis of Cold Rolled and Annealed Duplex 2205 Stainless Steel

Geshani

Mirzadeh

Sohrabi

2022

steel research int.

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“…The material constants σ 0 and k are assumed to be 400 MPa and 530 MPa•µm 0.5 [27], respectively. The FE model predicts that the largest grains-on the axisymmetric centreline of the billet-increased to approximately 17.1 to 17.8 µm (depending on the convection being wither forced or natural), whereas the smallest grains, at the outer edge of the billet, only increased approximately 7.4 to 8.2 µm (see Table 4).…”

Section: Discussionmentioning

confidence: 99%

A Study of the Convective Cooling of Large Industrial Billets

Turner

2021

JMMP

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The thermodynamic heat-transfer mechanisms, which occur as a heated billet cools in an air environment, are of clear importance in determining the rate at which a heated billet cools. However, in finite element modelling simulations, the convective heat transfer term of the heat transfer mechanisms is often reduced to simplified or guessed constants, whereas thermal conductivity and radiative emissivity are entered as detailed temperature dependent functions. As such, in both natural and forced convection environments, the fundamental physical relationships for the Nusselt number, Reynolds number, Raleigh parameter, and Grashof parameter were consulted and combined to form a fundamental relationship for the natural convective heat transfer as a temperature-dependent function. This function was calculated using values for air as found in the literature. These functions were then applied within an FE framework for a simple billet cooling model, compared against FE predictions with constant convective coefficient, and further compared with experimental data for a real steel billet cooling. The modified, temperature-dependent convective transfer coefficient displayed an improved prediction of the cooling curves in the majority of experiments, although on occasion a constant value model also produced very similar predicted cooling curves. Finally, a grain growth kinetics numerical model was implemented in order to predict how different convective models influence grain size and, as such, mechanical properties. The resulting findings could offer improved cooling rate predictions for all types of FE models for metal forming and heat treatment operations.

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“…The revised Hall-Petch equation can be used to reveal the relationship between yield strength and microstructure. Since the propagation and slippage of dislocations occur mainly in the lath, the actual grain size can be substituted by using the lath thickness multiplied by 2 [38][39][40][41]:…”

Section: Effect Of Microstructure Evolution On Mechanical Propertiesmentioning

confidence: 99%

The Role of Cold Rolling Reduction on the Microstructure and Mechanical Properties of Ultra-Low Carbon Bainitic Steel

Wang

et al. 2022

Materials

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The present study investigates the microstructure and mechanical properties of ultra-low carbon bainitic steel (UCBS) under different cold rolling reductions. When the rolling reduction ratios were increased to 80%, the microstructure was refined, and the lath width of the bainite decreased from 601 nm to 252 nm. The ultimate tensile strength and yield strength increased from 812 MPa and 683 MPa to 1195 MPa and 1150 MPa, respectively, whereas the elongation decreased from 15.9% to 7.9%. In addition, the dislocation density increased from 8.3 × 1013 m−2 to 4.87 × 1014 m−2 and a stronger γ-fiber texture was obtained at the 80% cold rolling reduction ratio. The local stress distribution and kernel average misorientation were not uniform and became more severe with increased rolling reduction ratios. The strength increment of UCBS was primarily due to boundary strengthening and dislocation strengthening. The theoretical strength increment agreed well with the experimental measurements, which can be helpful for the design and production of UCBS for broad engineering applications.

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Hall-Petch relationship of interstitial-free steel with a wide grain size range processed by asymmetric rolling and subsequent annealing

Cited by 12 publications

References 37 publications

Detailed Hall–Petch Analysis of Cold Rolled and Annealed Duplex 2205 Stainless Steel

Detailed Hall–Petch Analysis of Cold Rolled and Annealed Duplex 2205 Stainless Steel

A Study of the Convective Cooling of Large Industrial Billets

The Role of Cold Rolling Reduction on the Microstructure and Mechanical Properties of Ultra-Low Carbon Bainitic Steel

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