Austenite Transformation Behavior and Mechanical Properties of Constructional V, Nb-Alloyed TRIP-Assisted Steel

Kussa, Roman; Kushchenko, I. V.; Andilakhai, Volodymyr; Petryshynets, Ivan; Ефременко, В. Г.; Zurnadzhy, V. І.

doi:10.4028/www.scientific.net/kem.864.241

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…2) were calculated for the austenitization temperature of 930 • C and grain size of 10 µm. As it was found earlier [36], lower temperature (900 • C) corresponds to the dual-phase (ferrite + austenite) interval in steel B. Therefore, the austenitization temperature of 930 • C was chosen for a simulation to ensure a single-phase austenitic state in both steels.…”

Section: Austenite Transformation Behavior and Microstructure Charact...mentioning

confidence: 98%

Comparative study on the effect of (Cr, Mo, V)-alloying on transformation and mechanical behavior of 0.2 wt.% C TRIP-assisted steel

Kussa¹,

Zurnadzhy²,

Dabalà³

et al. 2022

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The structure and mechanical properties of two 0.2 wt.% C TRIP-assisted steels (Transformation Induced Plasticity) were compared to evaluate the effect of additional (Cr, Mo, V)-alloying on transformation kinetic and tensile/impact behavior after isothermal bainite transformation (bainitizing) and Q&P (Quenching-and-Partitioning) treatment. The work was performed using SEM, XRD, tensile/impact testing, and computer simulation. It was found that adding 0.55 wt.% Cr, 0.2 wt.% Mo, and 0.11 wt.% V into Mn-Si-Nb steel increased the incubation time in pearlite and bainite temperature ranges by 5.6 and 4.4 times, respectively. More heavily alloyed steel performed an improved combination "Strength/Ductility/Impact Toughness": its maximum PSE (Product of Strength and Elongation) value of 24 GPa• % referred to bainitizing treatment, whereas the highest KCV 20 • C values (220-225 J cm −2 ) corresponded to Q&P treatment. Improved mechanical properties of (Cr, Mo, V)-alloyed steel were attributed to a higher amount of retained austenite and a slower rate of TRIP-effect.

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Section: Austenite Transformation Behavior and Microstructure Charact...mentioning

confidence: 98%

Comparative study on the effect of (Cr, Mo, V)-alloying on transformation and mechanical behavior of 0.2 wt.% C TRIP-assisted steel

Kussa¹,

Zurnadzhy²,

Dabalà³

et al. 2022

Self Cite

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“…Wang [7] provided the effects of strain rate and temperature on the dynamic tensile fracture strain of QP980 steel, whereas other scholars have studied the mechanical properties of TRIP800 steel [8][9][10][11]. Kussa [12] studied the austenite transformation kinetics and tensile properties of constructional 0.2 wt%C-Si2Mn2CrMoVNb TRIP-assisted steel. Fu [13] studied a low-alloyed C-Mn-Al-Si cold-rolled TRIP steel was tensile tested at room temperature and low temperature.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Compression Properties of the Resistance Spot Welding of High Strength Steels under Varying Temperature Conditions

Fan

Wang

2021

Advances in Materials Science and Engineering

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In this paper, we have studied the dynamic compression performance of the RSW of QP980 steel and TRIP800 steel by using a split Hopkinson pressure bar (SHPB), and we have also examined the fracture mode of the two research objects. It is found that the spot welding zone is primarily composed of the martensite structure, and there is a sparse defect of crystal structure adjacent to the center of nugget. In addition, there are evident gaps between the plates on both sides of the spot welding zone. Through the measurement of the microhardness of the two grade steel, it is found that the average hardness of the RSW of QP980 steel is higher than that of TRIP800 steel. There is a softening region in the interface of the heat affected zone and the substrate zone. The dynamic compression experiments are carried out on the RSW of QP980 steel and TRIP800 steel under 200°C and 300°C conditions, and it is found that the strain rate would increase with the rising temperature, but the compressive strength would experience declines. Furthermore, the sparse defects of crystal structure adjacent to the center of nugget would lead to stress rebound when the specimen is compressed. Moreover, through the observation of the fracture surface of the recovered specimens, it is found that the fracture of the nugget is brittle, whereas the fracture mode of the sample is more complicated. In addition, the fracture surface features a number of “river pattern” cleavage facets, and there are very few dimples of ductile tearing. This study is expected to have huge implications to the safety of vehicle body under high-speed impact.

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Austenite Transformation Behavior and Mechanical Properties of Constructional V, Nb-Alloyed TRIP-Assisted Steel

Cited by 2 publications

References 27 publications

Comparative study on the effect of (Cr, Mo, V)-alloying on transformation and mechanical behavior of 0.2 wt.% C TRIP-assisted steel

Comparative study on the effect of (Cr, Mo, V)-alloying on transformation and mechanical behavior of 0.2 wt.% C TRIP-assisted steel

Dynamic Compression Properties of the Resistance Spot Welding of High Strength Steels under Varying Temperature Conditions

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