Analysis of Rheological Behavior on Transformation Induced Plasticity Steel

2016 ◽  
Vol 850 ◽  
pp. 120-127
Author(s):  
Ji Quan Sun ◽  
Sheng Yang Teng ◽  
Yan Jun Yin ◽  
Chuang Niu
Keyword(s):  
Plastic Deformation ◽  
Trip Steel ◽  
Test Machine ◽  
Transformation Induced Plasticity ◽  
Shaping Time ◽  
Plastic Forming ◽  
Plastic Shaping ◽  
Simulated Test ◽  
Plastic Deformation Rate ◽  
Gleeble 3500

The cupping tests under different rate demonstrated that there was a correlation between the plastic deformation and shaping time of transformation induced plasticity (TRIP) steel, illustrating that there was also the rheology in the process of plastic forming for solid metal materials. The creep experiments were carried out by Gleeble 3500 thermal simulated test machine, and Mises yield rule was used to verify the creep experiments satisfying the visco-plastic conditions when the load was greater than yield strength. The visco-plastic deformation rate of creep experiments was obtained based on Bingham model. The viscous correlation coefficient (γ) was deduced, reaching that the viscosity of TRIP steel shows deformation resistance in the process of plastic shaping. These results provide the theoretical basis for increasing the plate yield and controlling the forming rate.

Isothermal Transformation of Wustite for Low Carbon Micro-Alloyed Steel

2013 ◽  
Vol 683 ◽  
pp. 457-463
Author(s):  
Sheng Liu ◽  
Di Tang ◽  
Hui Bin Wu ◽  
Zheng Xu Cai
Keyword(s):  
Isothermal Transformation ◽  
Electron Back Scatter Diffraction ◽  
Alloyed Steel ◽  
Eutectoid Reaction ◽  
Test Machine ◽  
Low Carbon ◽  
Simulated Test ◽  
Micro Alloyed Steel ◽  
Gleeble 3500 ◽  
Scanning Electron

The isothermal transformation of wustite (FeO) in the range of 650~350°C was studied using Gleeble 3500 thermal simulated test machine, electron back-scatter diffraction (EBSD) and scanning electron microscopy (SEM). A wustite layer was initially formed by oxidizing low carbon micro-alloyed steel in air at 880°C for 20 seconds. The layer was then isothermally annealed at 650-350°C in argon for up to 10000 seconds. The transformation of FeO was comprised by a proeutectoid reaction and a eutectoid reaction. FeO initially transformed to Fe3O4 by proeutecioid reaction and then the retained FeO transformed to lamellar mixture Fe+Fe3O4 by eutectoid reaction. The proeutectoid and eutectoid reactions both followed a C-curve trend and the nose temperatures were 475°C and 425°C, respectively. An isothermal transformation (IT) diagram was summarized based on our results.

The Static Recrystallization Behavior of Fe-Mn-Si-Al Series TWIP Steel

2014 ◽  
Vol 893 ◽  
pp. 419-423 ◽  
Author(s):  
Yan Xin Wu ◽  
Di Tang ◽  
Zhen Li Mi ◽  
Hai Tao Jiang
Keyword(s):  
Deformation Rate ◽  
Static Recrystallization ◽  
Twip Steel ◽  
Experimental Results ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Test Machine ◽  
Recrystallization Behavior ◽  
Simulated Test ◽  
Gleeble 3500

he softening and static recrystallization behavior of typical Fe-Mn-Si-Al series TWIP steel between high temperature deformation passes was investigated by two-pass hot compress deformation experiments on Gleeble-3500 thermal simulated test machine. The dynamic model of static recrystallization was built according to the experimental results. The investigation of the effects of deformation temperature, deformation rate and pre-deformation shows that deformation rate is the most effective parameter, and the increase of deformation and pre-deformation can also promote the static recrystallization. The calculated static recrystallization activation energy of TWIP steel is about 147kJ/mol through the dynamic equation built. The results of model predict conform to the experimental results.

scholarly journals Geometrically Necessary Dislocations on Plastic Deformation of Polycrystalline TRIP Steel

Crystals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 289 ◽  
Author(s):  
Joan Josep Roa ◽  
Sebastián Suárez ◽  
Agustina Guitar ◽  
Gemma Fargas ◽  
Antonio Mateo
Keyword(s):  
Plastic Deformation ◽  
Stainless Steel ◽  
Deformation Mechanism ◽  
Trip Steel ◽  
Deformation Behavior ◽  
Local Level ◽  
Length Scale ◽  
Transformation Induced Plasticity ◽  
Sharp Indentation ◽  
Main Deformation

In this study, the main deformation behavior in terms of geometrically necessary dislocations (GND) was investigated on a transformation induced plasticity (TRIP) stainless steel by using sharp indentation at nanometric length scale. Results evidence that austenitic grains display an isotropic behavior on terms of GND, the main deformation mechanism being the Frank–Read source activated at local level.

Influence of Aging Treatments on the Structural and Mechanical Properties of AGS Alloy Wire Cold Drawn

2018 ◽  
Vol 18 ◽  
pp. 73-78
Author(s):  
Mokhtar Bayarassou ◽  
Mosbah Zidani ◽  
Hichem Farh
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Electron Microscope ◽  
Artificial Ageing ◽  
Micro Hardness ◽  
X Ray Diffraction ◽  
Alloy Wire ◽  
X Ray ◽  
Plastic Deformation Rate ◽  
Scanning Electron

The scope of this work is to study of microstructural changes and mechanical properties during natural and artificial ageing treatment of AGS Alloy wire cold drawn with different deformation at ENICAB in Biskra. And as well to know the phase formation during different deformation of aluminum alloys wires. as well as the combined influence of the plastic deformation rate and the aging temperature. Wire section reduction shows a change in microstructure and texture. The methods of characterization used in this work are: scanning electron microscope and X-ray diffraction, micro hardness (Hv).

scholarly journals Quantitative Description of External Force Induced Phase Transformation in Silicon–Manganese (Si–Mn) Transformation Induced Plasticity (TRIP) Steels

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3781
Author(s):  
Zhongping He ◽  
Huachu Liu ◽  
Zhenyu Zhu ◽  
Weisen Zheng ◽  
Yanlin He ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Carbon Steel ◽  
Trip Steel ◽  
Retained Austenite ◽  
Low Carbon Steel ◽  
High Strength ◽  
High Plasticity ◽  
Low Carbon ◽  
Transformation Induced Plasticity ◽  
Trip Steels

Transformation Induced Plasticity (TRIP) steels with silicon–manganese (Si–Mn) as the main element have attracted a lot of attention and great interest from steel companies due to their low price, high strength, and high plasticity. Retained austenite is of primary importance as the source of high strength and high plasticity in Si–Mn TRIP steels. In this work, the cold rolled sheets of Si–Mn low carbon steel were treated with TRIP and Dual Phase (DP) treatment respectively. Then, the microstructure and composition of the Si–Mn low carbon steel were observed and tested. The static tensile test of TRIP steel and DP steel was carried out by a CMT5305 electronic universal testing machine. The self-built true stress–strain curve model of TRIP steel was verified. The simulation results were in good agreement with the experimental results. In addition, the phase transformation energy of retained austenite and the work borne by austenite in the sample during static stretching were calculated. The work done by austenite was 14.5 J, which was negligible compared with the total work of 217.8 J. The phase transformation energy absorption of retained austenite in the sample was 9.12 J. The role of retained austenite in TRIP steel is the absorption of excess energy at the key place where the fracture will occur, thereby increasing the elongation, so that the ferrite and bainite in the TRIP steel can absorb energy for a longer time and withstand more energy.

scholarly journals KINEMATICAL FEATURES OF FORMATION OF A FLANGE WITH MINIMUM TENSION OF A TRANSIENT TOROIDAL SURFACE

2018 ◽  
pp. 132-136
Author(s):  
M. I. Sidorenko
Keyword(s):  
Free Surface ◽  
Cylindrical Part ◽  
Contact Friction ◽  
Internal Cavity ◽  
Toroidal Surface ◽  
Plastic Forming ◽  
Plastic Shaping ◽  
Deformation Force ◽  
Outer Plane

The technology of plastic forming of wide flanges in tube billets with the predicted length of the transitional toroidal section between the outer plane of the flange and the internal cavity of the pipe is proposed. The procedure for calculating the length of this section is given. In order to eliminate the toroidal portion in the flange formed during the flanging of the pipe, it is proposed to perform its plastic shaping by depositing the cylindrical part of the workpiece. Equations for calculating the extent of the free surface on the toroidal part of the workpiece when it is shaped, depending on the coefficient of contact friction and the presence of a radial support of the flange are obtained. The variant of forming in the flange the toroidal section in the stamp with the compensation cavity is proposed. Equations for calculating the deformation force and the extent of the free surface are given.

scholarly journals Effect of Cyclic Load Amplitude on the Evolving Characteristics of Accumulative Deformation in Subgrade Bed

2019 ◽  
Vol 9 (7) ◽  
pp. 1435 ◽  
Author(s):  
Gang Liu ◽  
Mingzhi Zhao ◽  
Qiang Luo ◽  
Hongyu Jia
Keyword(s):  
Plastic Deformation ◽  
Deformation Rate ◽  
Cyclic Load ◽  
Laboratory Model ◽  
Plastic Behavior ◽  
Power Exponent ◽  
Plastic Deformation Rate ◽  
Displacement Transducers ◽  
Laboratory Model Test ◽  
The Relationship

To investigate the evolving characteristics of plastic deformation for the angular gravels that are used to construct subgrade bed, a laboratory model test is performed with cyclic load applying. Vertical deformation is measured in real time by displacement transducers and further modified to analyze the plastic behavior of model fillings. It can be found that vertical plastic deformation shows quite different developing patterns under the effect of different cyclic amplitudes for a given model. A power function is adopted to describe the relationship between deformation rate and loading times. By analyzing the value of the power exponent and the corresponding developing features of plastic deformation rate, model filling status can be classified into four different zones, i.e., rapid stabilization, tardy stabilization, tardy failure, and rapid failure. Such a classification reveals different developing patterns of plastic deformation and satisfies the design of subgrade bed for ballasted and unballasted railway.

Determination of plastic deformation rate after solid particle erosion in ductile materials

2021 ◽  
Vol 63 (12) ◽  
pp. 1142-1149
Author(s):  
Aygen Ahsen Erdoğan ◽  
Erol Feyzullahoğlu ◽  
Sinan Fidan ◽  
Tamer Sinmazçelik
Keyword(s):  
Plastic Deformation ◽  
Solid Particle ◽  
Deformation Rate ◽  
High Speed ◽  
Target Material ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Erosion Rates ◽  
High Speed Impact ◽  
Plastic Deformation Rate

Abstract AA6082-T6 aluminium alloy is a candidate material, specifically in aviation applications, which could be exposed to solid particle erosion. Solid particle erosion occurs due to repetitive high-speed impact of erodent particles on a target material. Every individual impingement of the erodent particle results in elastic/plastic deformations and material removal from the target material. In this study, solid particle erosion investigations were carried out under 1.5 and 3 bar with 60 and 120 mesh alumina particles. Both erosion rates and worn volumes of the samples were calculated and measured. Also, the authors present the plastic deformation rate in this study as a proportion of the actual (measured) worn volume to the equivalent volume of the mass loss. In addition, the average surface roughness of the samples were investigated, which is another parameter for understanding the effect of plastic deformation on surface properties during particle erosion.

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