Study on hot deformation behaviour of 316LN austenitic stainless steel based on hot processing map

Liu, X G; Ji, Hai Peng; Guo, Huijun; Jin, Miao; Guo, Bo; Gao, L.

doi:10.1179/1743284712y.0000000083

Cited by 21 publications

(9 citation statements)

References 27 publications

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“…In the metal-forming process, component production involves several stages under which a material experiences large forces and complex stresses [10]. During forming, the plastic deformation cause generation of internal heat, which result in grain growth [11]. The forming parameters such as temperature, strain rate and strain affect the final product microstructure, which impacts the overall mechanical properties of the product [12].…”

Section: Introductionmentioning

confidence: 99%

Understanding hot workability of power plant P92 creep resistant steels using dynamic material modelling (DMM) and microstructural evolution

Obiko

Chown

Whitefield

et al. 2022

Int J Interact Des Manuf

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This study reports the hot workability of two P92 creep-resistant steels with different chromium and tungsten contents, all within the ASME specification. These steels are used in manufacturing modern power plant boiler pipes. Uniaxial compression tests were done using a Gleeble® 3500 thermal-mechanical equipment. The test conditions were: deformation temperature of 850-1000°C and strain rate of 0.1-10s -1 . Experimental flow stress values obtained from isothermal hot compression tests were used to construct processing maps employing the dynamic material model approach. The flow stress-strain curve results of the two steels exhibited dynamic recovery characteristics. The flow stress increased with a decrease in temperature or an increase in strain rate. The correlation between the processing maps and the microstructure of the deformed samples reveals that the optimal processing window for the two steels occurred at a deformation temperature of 850°C and 1000°C and a lower strain rate of 0.1s -1 for the conditions studied. These regions had maximum power efficiency of 26% (P92-A steel) and 19% (P92-B steel). The findings from this study have provided a new approach to process parameter optimisation using a dynamic material model technique of industrial metal forming of P92 steels. Hence, reducing manufacturing time and cost.

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Section: Introductionmentioning

confidence: 99%

Understanding hot workability of power plant P92 creep resistant steels using dynamic material modelling (DMM) and microstructural evolution

Obiko

Chown

Whitefield

et al. 2022

Int J Interact Des Manuf

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“…Guo [15] constructed the power dissipation map of 316LN stainless steel without a clear description on its applications. He [16], Guo [17], and Liu [18] investigated the hot workability of 316LN and constructed the hot processing map, but the characteristics of different regions on the conventional processing map should be further detailed. Sun [19] also constructed the hot processing map with metallographic analysis.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Recrystallization and Hot Workability of 316LN Stainless Steel

Sun

Xiang

Zhou

et al. 2016

Metals

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Abstract:To identify the optimal deformation parameters for 316LN austenitic stainless steel, it is necessary to study the macroscopic deformation and the microstructural evolution behavior simultaneously in order to ascertain the relationship between the two. Isothermal uniaxial compression tests of 316LN were conducted over the temperature range of 950-1150˝C and for the strain rate range of 0.001-10 s´1 using a Gleeble-1500 thermal-mechanical simulator. The microstructural evolution during deformation processes was investigated by studying the constitutive law and dynamic recrystallization behaviors. Dynamic recrystallization volume fraction was introduced to reveal the power dissipation during the microstructural evolution. Processing maps were developed based on the effects of various temperatures, strain rates, and strains, which suggests that power dissipation efficiency increases gradually with increasing temperature and decreasing stain rate. Optimum regimes for the hot deformation of 316LN stainless steel were revealed on conventional hot processing maps and verified effectively through the examination of the microstructure. In addition, the regimes for defects of the product were also interpreted on the conventional hot processing maps. The developed power dissipation efficiency maps allow optimized processing routes to be selected, thus enabling industry producers to effectively control forming variables to enhance practical production process efficiency.

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“…The maximum tensile stress obtained was much lower than those shown in Table 4. This value shows that the principal stress at the lateral side of the sample is lower than the ultimate tensile stress (430 MPa) of X20 power plant steel after 130000 h for service temperature of 530 °C [26][27][28][29].…”

Section: Regression Analysis Of Maximum Forging Force and Tensile Stressmentioning

confidence: 82%

Forging optimisation process using numerical simulation and Taguchi method

2020

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This study reports on the optimisation of the forging process using Deform™ 3D simulation software and the Taguchi method. The forging simulation process was conducted on X20 steel used because of its application in boiler pipes in the fossil-fuel power plants. A three-level, three parameter Taguchi design of experiment for the Deform 3D simulations was used. The parameters considered for the simulations were cylinder (deformation) temperature, die speed and friction coefficient were studied. From the forging process, simulation results were analysed using Taguchi's orthogonal array. Further, ANOVA analysis was carried out to determine the significance of the parameters to the forging responses (maximum tensile stress and forging force). Results of the statistical analysis showed that the optimal parameters for improved product quality were deformation temperature of 1000 °C, die speed of v 20 mm/s and friction coefficient of 0.2. A confirmatory simulation was carried out using the optimal parameters. The simulation results verified that the optimal parameters showed a lower maximum tensile stress to 252.5 ± 2.5 MPa at the lateral surface of the deformed sample compared to other investigated conditions.

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Study on hot deformation behaviour of 316LN austenitic stainless steel based on hot processing map

Cited by 21 publications

References 27 publications

Understanding hot workability of power plant P92 creep resistant steels using dynamic material modelling (DMM) and microstructural evolution

Understanding hot workability of power plant P92 creep resistant steels using dynamic material modelling (DMM) and microstructural evolution

Dynamic Recrystallization and Hot Workability of 316LN Stainless Steel

Forging optimisation process using numerical simulation and Taguchi method

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