Continuous cooling transformation diagrams and properties of micro-alloyed TRIP steels

Zhang, M.; Li, L.; Fu, Ren Yu; Križan, Daniel; Cooman, Bruno C. De

doi:10.1016/j.msea.2006.01.128

Cited by 71 publications

(32 citation statements)

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“…Specimens taken from the steel plates before and after tensile test were mechanically polished and etched in a solution of 5% nitric acid and 95% alcohol (Zhang et al, 2006). Micro-structural observations were carried out using Epiphot300 microscope, S-570 SEM&EDS and Digital Micrograph image analysis software.…”

Section: Microstructure Observationmentioning

confidence: 99%

Effect of strain rate on deformation behavior of TRIP steels

Ling

et al. 2012

Journal of Materials Processing Technology

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Section: Microstructure Observationmentioning

confidence: 99%

Effect of strain rate on deformation behavior of TRIP steels

Ling

et al. 2012

Journal of Materials Processing Technology

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“…For example, TRIP800 steels used in this study contain only the 3.5 wt% total content of alloying elements. The chemical composition of the traditional TRIP steel is 0.1 0.4 C1.5 Mn1.5 Si [3]. Carbon increases the stability of austenite so austenite can be found as retained to below ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Mechanical Properties of Metal Inert Gas-Brazed TRIP800 Steel Joints Using Different Shielding Gas Flow Rate

et al. 2014

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In this study, TRIP 800 (transformation induced plasticity) steel plates having 1.5 mm thickness were joined by copper-based (CuAl8) wire in gas metal arc brazing technique. Specimens were prepared in joining forms as butt joint. Brazing operations were done with ve dierent shielding gas ow rates of 8, 10, 12, 14, and 16 L/min. CuAl8 wire composed mostly of copper serves as the ller metal. Having accomplished the brazing operations, tensile properties of joints were detected, and micro-and macrostructures of joints were investigated in order to see the joinability of TRIP 800 steel by gas metal arc brazing technique.

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“…The demand for higher strength TRIP grades (800 to 1200 MPa) for automobile applications can be met by increasing the carbon content to around 0.4 (wt pct); however, higher carbon levels may cause difficulties in hot rolling and serious weldability problems, particularly for wide formats. [24] Thus, the microalloying concept (Ti, V, and Nb) has been incorporated into the TRIP steels in order to keep the C content low, and these steel grades have been developing. [25][26][27] Precipitation hardening by microalloying additions (Ti, Nb, and V) is an interesting alternative to increase the carbon concentration and has the major advantage that weldability and hot rolling parameters would not be deteriorated.…”

Section: Introductionmentioning

confidence: 99%

Hot Ductility and Compression Deformation Behavior of TRIP980 at Elevated Temperatures

Zhang

Gan

et al. 2017

Metall Mater Trans B

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The hot ductility tests of a kind of 980 MPa class Fe-0.31C (wt pct) TRIP steel (TRIP980) with the addition of Ti/V/Nb were conducted on a Gleeble-3500 thermomechanical simulator in the temperatures ranging from 873 K to 1573 K (600°C to 1300°C) at a constant strain rate of 0.001 s À1 . It is found that the hot ductility trough ranges from 873 K to 1123 K (600°C to 850°C). The recommended straightening temperatures are from 1173 K to 1523 K (900°C to 1250°C). The isothermal hot compression deformation behavior was also studied by means of Gleeble-3500 in the temperatures ranging from 1173 K to 1373 K (900°C to 1100°C) at strain rates ranging from 0.01 s À1 to 10 s À1 . The results show that the peak stress decreases with the increasing temperature and the decreasing strain rate. The deformation activation energy of the test steel is 436.7 kJ/mol. The hot deformation equation of the steel has been established, and the processing maps have been developed on the basis of experimental data and the principle of dynamic materials model (DMM). By analyzing the processing maps of strains of 0.5, 0.7, and 0.9, it is found that dynamic recrystallization occurs in the peak power dissipation efficiency domain, which is the optimal area of hot working. Finally, the factors influencing hot ductility and thermal activation energy of the test steel were investigated by means of microscopic analysis. It indicates that the additional microalloying elements play important roles both in the loss of hot ductility and in the enormous increase of deformation activation energy for the TRIP980 steel.

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Continuous cooling transformation diagrams and properties of micro-alloyed TRIP steels

Cited by 71 publications

References 0 publications

Effect of strain rate on deformation behavior of TRIP steels

Effect of strain rate on deformation behavior of TRIP steels

Investigation of Mechanical Properties of Metal Inert Gas-Brazed TRIP800 Steel Joints Using Different Shielding Gas Flow Rate

Hot Ductility and Compression Deformation Behavior of TRIP980 at Elevated Temperatures

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