Hot Deformation Behavior and Processing Maps of a High Al-low Si Transformation-Induced Plasticity Steel: Microstructural Evolution and Flow Stress Behavior

Huang, Hongshou; Di, Hongshuang; Yan, Ning; Zhang, J. C.; Deng, Yansheng; Misra, R.D.K.; Li, J. P.

doi:10.1007/s40195-017-0676-2

Cited by 15 publications

(6 citation statements)

References 40 publications

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“…This steel is alloyed with manganese to support austenite retention during heat or thermo-mechanical treatments. Moreover, silicon and aluminium have similar effects, they provide solid solution hardening of the ferrite at one hand and postpone cementite precipitation during the treatment on the other hand [11]. If carbon is not consumed by the precipitation of the carbides, it is available in a larger amount for chemical stabilization of the remaining austenite.…”

Section: Experimental Programmentioning

confidence: 99%

Effect of various heat and thermo-mechanical treatments on low alloyed CMnAlNb high strength steel

Kučerová¹,

Tichá²,

Stehlík³

2022

Manufacturing Technology

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Low carbon low alloyed high strength steel with the chemical composition suitably designed to support the stabilization of retained austenite was used in this work. The steel was processed by conventional annealing for a reference and several different heat and thermomechanical treatments were further proposed to test typical TRIP (transformation induced plasticity), DP (dual phase) steel and QP (quenching and partitioning) processing routes. All the processing methods used the same soaking temperature of 1050 °C. Processed samples were subjected to metallographic analysis, hardness measurement and tensile test to characterise resulting microstructures. While simple annealing reached tensile strength of 861 MPa with 25% of total elongation, the best combination of the highest tensile strength of 903 MPa and a total elongation of 32% was obtained after processing typical for TRIP steel. QP treatment resulted in the highest tensile strength of 1289 MPa with a total elongation of 19%.TRIP steel DP steel QP treatment high strength steel

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Section: Experimental Programmentioning

confidence: 99%

Effect of various heat and thermo-mechanical treatments on low alloyed CMnAlNb high strength steel

Kučerová¹,

Tichá²,

Stehlík³

2022

Manufacturing Technology

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“…The power dissipation due to plastic deformation is known as G content and is represented in equation (2). The power dissipated through the microstructure change is known as J co-content and is shown in equation (3). When the work-piece works as an ideal linear dissipater, the J reaches its maximum value (J= Jmax= sέ/2).…”

Section: Methodsmentioning

confidence: 99%

“…Processing maps are extensively used to optimize the hot deformation process and achieve the desired microstructure for safe working and achieve the desired mechanical properties without trial and error and determining process limitations in the manufacturing process [2][3][4]. Prasad et.al.…”

Section: Introductionmentioning

confidence: 99%

Hot deformation behavior of micro-alloyed steel using processing maps developed with different constitutive equations

Thakur

Das

Jha³

2022

J min metall B Metall

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The hot workability of microalloyed steel was studied in the deformation temperature range of 850-1200oC and strain rate of 0.001-100s-1. The constitutive relation of flow stress with temperature, strain rate and strain was established to construct processing maps of the microalloyed steel. The processing maps were constructed using conventional power law, integral method and Arrhenius equations. The developed processing maps were used to predict the optimal hot deformation conditions and validated with metallurgical examinations. The safe regime for hot working of the experimental steel was found to be in the intermediate temperature-strain rate range (1000-1150oC- 0.001-10 s-1), where the deformation process is dominated by dynamic recrystallization and dynamic recovery of the austenitic phase. The processing map constructed using Arrhenius equations increases continuously with an increase in deformation temperature and decrease in strain rate and does not reveal relevant information of hot workability with respect to deformation temperature and strain rate. The dynamic recrystallization behavior of experimental steel was affected by both deformation temperature and strain rate which is explained in detail through microstructural examination.

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“…Considering that the hot rolled plates are directly applied in automobile body, the surface quality becomes an important performance of hot rolled products. Since Si deteriorates surface quality of hot rolled plates, TRIP steel containing Al in partial or full substitution for Si needs to be studied for better surface quality [6][7][8]. Based on the fact that polygonal ferrite, bainitic ferrite and retained austenite are soft phases, the tensile strength of TRIP steel is relatively lower than some other advanced high strength steels, such as MART steel, Q&P steel and DP steel.…”

Section: Introductionmentioning

confidence: 99%

Characterisation on Al-bearing hot-rolled TRIP steel produced through isothermal bainite transformation

Wang

Kang

et al. 2020

Materials Science and Technology

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In this study, an energy-efficient processing route involving hot rolling and on-line heat treatment was proposed, which is applied to Nb-alloyed and Al-containing hot-rolled TRIP steel. The experiments were carried out involving hot rolling and on-line heat treatment, where the samples were subjected to different bainite hold times. The results shows that during isothermal bainite transformation, film-like and blocky retained austenite were present in microstructures at bainite hold times of 10 and 20 min. The sample subjected to bainite hold time of 20 min exhibited excellent mechanical properties, with tensile strength of 839 MPa, total elongation of 38% and product of strength and elongation of 31.9 GPa%. The instantaneous work hardening exponent increased gradually with true strain at bainite hold time of 20 min.

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Hot Deformation Behavior and Processing Maps of a High Al-low Si Transformation-Induced Plasticity Steel: Microstructural Evolution and Flow Stress Behavior

Cited by 15 publications

References 40 publications

Effect of various heat and thermo-mechanical treatments on low alloyed CMnAlNb high strength steel

Effect of various heat and thermo-mechanical treatments on low alloyed CMnAlNb high strength steel

Hot deformation behavior of micro-alloyed steel using processing maps developed with different constitutive equations

Characterisation on Al-bearing hot-rolled TRIP steel produced through isothermal bainite transformation

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