Hot deformation behavior and softening kinetics of Ti–V–B microalloyed steels

Opiela, M.; Grajcar, A.

doi:10.1016/j.acme.2012.06.003

Cited by 27 publications

(20 citation statements)

References 8 publications

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“…Titanium alloys are attractive structural materials, compared to other light alloys and modern high strength steels as investigated by A. Grajcar and A. Kurc [1][2][3]. However, due to poor tribological properties of titanium and titanium alloys, their service life may not be satisfactory under certain OPEN ACCESS conditions, as reported by A. Biswas and P. Schaaf [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 94%

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Titanium Matrix Composite Ti/TiN Produced by Diode Laser Gas Nitriding

Lisiecki

2015

Metals

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A high power direct diode laser, emitting in the range of near infrared radiation at wavelength 808-940 nm, was applied to produce a titanium matrix composite on a surface layer of titanium alloy Ti6Al4V by laser surface gas nitriding. The nitrided surface layers were produced as single stringer beads at different heat inputs, different scanning speeds, and different powers of laser beam. The influence of laser nitriding parameters on the quality, shape, and morphology of the surface layers was investigated. It was found that the nitrided surface layers consist of titanium nitride precipitations mainly in the form of dendrites embedded in the titanium alloy matrix. The titanium nitrides are produced as a result of the reaction between molten Ti and gaseous nitrogen. Solidification and subsequent growth of the TiN dendrites takes place to a large extent at the interface of the molten Ti and the nitrogen gas atmosphere. The direction of TiN dendrites growth is perpendicular to the surface of molten Ti. The roughness of the surface layers depends strongly on the heat input of laser nitriding and can be precisely controlled. In spite of high microhardness up to 2400 HV0.2, the surface layers are crack free.

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Section: Introductionmentioning

confidence: 94%

“…16, Table 2) is about 5.5 mm 3 . It was estimated on the basis of the penetration depth profile (Figure 9a), the shape and the dimensions of the top surface of the solidified weld pool which is 6 mm wide and 0.7-1.5 mm long in the middle, as shown on the left side of Figure 7c.…”

Section: Sample Type Roughness Parameters Mmentioning

confidence: 99%

Titanium Matrix Composite Ti/TiN Produced by Diode Laser Gas Nitriding

Lisiecki

2015

Metals

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“…The need for this information is related to the need for new engineering materials characterised by a unique combination of mechanical and plastic properties and, principally, to meet the higher demands on the structural elements of road vehicles. It is also important to have knowledge about changes in the mechanical properties of engineering materials during production involving plastic deformation, metal forming of the final components with elevated or high deformation rates .…”

Section: Introductionmentioning

confidence: 99%

Influence of high strain rates on the structure and mechanical properties of high‐manganes austenitic TWIP‐type steel

Dobrzański

Borek

Mazurkiewicz

2016

Materialwissenschaft Werkst

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The purpose of this paper is to determine the influence of high strain rates on the structure and mechanical properties of high‐Mn austenitic TWIP steel. Low and high strain deformation rates in the range of 0.001 s–1 to 1000 s–1 have a significant effect on the forming of the structure and mechanical properties of high‐manganese austenitic steel. Also, the strain energy per unit volume of advanced high‐Mn TWIP steel containing Mn, Al and SI, with Nb and Ti microadditions, increases considerably in dynamic conditions. This group of steels not only shows excellent strength, but also excellent formability due to twinning, thereby leading to a unique combination of strength, ductility and formability when compared with conventional dual phase steels or transformation induced plasticity TRIP steels. The microstructure of the investigated steel was determined in metallographic investigations using scanning and high‐resolution transmission electron microscopies (HRTEM). Results obtained in static and dynamic conditions for new developed high‐manganese austenitic steel indicate their possible employment for the constructional elements of vehicles, especially passenger cars, to take advantage of the significant growth of their strain energy per unit volume. This guarantees a reserve of plasticity in the zones of controlled energy absorption during possible collision resulting from the activation of twinning induced by cold working, which may lead to a significant growth of the passive safety of these vehicles' passengers.

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“…4, 5). All the partially penetrated bead-onplate welds were produced at power density of the laser beam in a range from 3.2x10 6 W/cm 2 to 6.5x10 6 W/cm 2 , so over the threshold required for keyhole welding of structural mild or low alloyed steel plates [1,3]. Shape of the analyzed beadon-plate welds in "V" configuration, as well as the depth/ width ratio of FZ in a range 1.15÷1.2 clearly shows that the welds were produced at keyhole mode welding (Fig.…”

Section: Analyze Of Penetration Characteristics and Porosity Of Bead-mentioning

confidence: 99%

Effect of Heat Input During Disk Laser Bead-On-Plate Welding of Thermomechanically Rolled Steel on Penetration Characteristics and Porosity Formation in the Weld Metal

Lisiecki¹

2016

Archives of Metallurgy and Materials

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The paper presents a detailed analysis of the influence of heat input during laser bead-on-plate welding of 5.0 mm thick plates of S700MC steel by modern Disk laser on the mechanism of steel penetration, shape and depth of penetration, and also on tendency to weld porosity formation. Based on the investigations performed in a wide range of laser welding parameters the relationship between laser power and welding speed, thus heat input, required for full penetration was determined. Additionally the relationship between the laser welding parameters and weld quality was determined.

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Hot deformation behavior and softening kinetics of Ti–V–B microalloyed steels

Cited by 27 publications

References 8 publications

Titanium Matrix Composite Ti/TiN Produced by Diode Laser Gas Nitriding

Titanium Matrix Composite Ti/TiN Produced by Diode Laser Gas Nitriding

Influence of high strain rates on the structure and mechanical properties of high‐manganes austenitic TWIP‐type steel

Effect of Heat Input During Disk Laser Bead-On-Plate Welding of Thermomechanically Rolled Steel on Penetration Characteristics and Porosity Formation in the Weld Metal

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