scholarly journals Correlation between vanadium carbide size and hydrogen trapping in ferritic steel

2018 ◽  
Vol 152 ◽  
pp. 112-116 ◽  
Author(s):  
Andrej Turk ◽  
David San Martín ◽  
Pedro E.J. Rivera-Díaz-del-Castillo ◽  
Enrique I. Galindo-Nava
Keyword(s):  
Ferritic Steel ◽  
Vanadium Carbide ◽  
Hydrogen Trapping ◽  
Carbide Size

scholarly journals Hydrogen Trapping Behavior in Vanadium Microalloyed TRIP-Assisted Annealed Martensitic Steel

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 741
Author(s):  
Yang ◽  
Yu ◽  
Li
Keyword(s):  
Vanadium Carbide ◽  
Hydrogen Diffusion ◽  
Martensitic Steel ◽  
Tensile Tests ◽  
Test Results ◽  
Hydrogen Trapping ◽  
Martensitic Steels ◽  
Transformation Induced Plasticity ◽  
Hydrogen Charging ◽  
Transmission Electron

Transformation induced plasticity (TRIP)-assisted annealed martensitic (TAM) steel combines higher tensile strength and elogangtion, and has been increasingly used but appears to bemore prone to hydrogen embrittlement (HE). In this paper, the hydrogen trapping behavior and HE of TRIP-assisted annealed martensitic steels with different vanadium additions had been investigated by means of hydrogen charging and slow strain rate tensile tests (SSRT), microstructral observartion, and thermal desorption mass spectroscope (TDS). Hydrogen charging test results indicates that apparent hydrogen diffusive index Da is 1.94 × 10−7/cm2·s−1 for 0.21wt.% vanadium steel, while the value is 8.05×10−7/cm2·s−1 for V-free steel. SSRT results show that the hydrogen induced ductility loss ID is 76.2% for 0.21wt.%V steel, compared with 86.5% for V-free steel. The trapping mechanism of the steel containing different V contents is analyzed by means of TDS and Transmission electron microscope (TEM) observations. It is found out that the steel containing 0.21wt.%V can create much more traps for hydrogen trapping compared with lower V steel, which is due to vanadium carbide (VC) precipitates acting as traps capturing hydrogen atoms.The relationship between hydrogen diffusion and hydrogentrapping mechanism is discussed in details.

Hydrogen trapping in ferritic steel weld metal

2002 ◽  
Vol 47 (4) ◽  
pp. 191-223 ◽  
Author(s):  
I. Maroef ◽  
D. L. Olson ◽  
M. Eberhart ◽  
G. R. Edwards
Keyword(s):  
Weld Metal ◽  
Ferritic Steel ◽  
Steel Weld ◽  
Hydrogen Trapping ◽  
Steel Weld Metal

Microanalysis of precipitates in a ferritic steel

1978 ◽  
Vol 36 (1) ◽  
pp. 618-619
Author(s):  
J.M. Titchmarsh
Keyword(s):  
Ferritic Steel ◽  
Particle Identification ◽  
Energy Dispersive ◽  
Objective Lens ◽  
Ferritic Steels ◽  
Replica Technique ◽  
X Ray ◽  
Large Numbers ◽  
Scanning Transmission ◽  
Made In

The advances in recent years in the microanalytical capabilities of conventional TEM's fitted with probe forming lenses allow much more detailed investigations to be made of the microstructures of complex alloys, such as ferritic steels, than have been possible previously. In particular, the identification of individual precipitate particles with dimensions of a few tens of nanometers in alloys containing high densities of several chemically and crystallographically different precipitate types is feasible. The aim of the investigation described in this paper was to establish a method which allowed individual particle identification to be made in a few seconds so that large numbers of particles could be examined in a few hours.A Philips EM400 microscope, fitted with the scanning transmission (STEM) objective lens pole-pieces and an EDAX energy dispersive X-ray analyser, was used at 120 kV with a thermal W hairpin filament. The precipitates examined were extracted using a standard C replica technique from specimens of a 2¼Cr-lMo ferritic steel in a quenched and tempered condition.

MICROSTRUCTURE EFFECT ON THE RESISTANCE TO THE IMPACT OF FERRITIC STEEL WELD METALS

2018 ◽  
Author(s):  
Rafael Santos ◽  
Theophilo Maciel ◽  
JAIME MATIAS DA SILVA NETO ◽  
Epitácio Bronzeado ◽  
Ívison Caio Pontes Pacheco
Keyword(s):  
Ferritic Steel ◽  
Steel Weld ◽  
Weld Metals ◽  
Microstructure Effect ◽  
The Impact

UNS T30407

Alloy Digest ◽  
1985 ◽  
Vol 34 (4) ◽  
Keyword(s):  
Tool Steel ◽  
Vanadium Carbide ◽  
Cold Work ◽  
Heat Treating ◽  
Cold Extrusion ◽  
High Carbon ◽  
Extrusion Dies ◽  
Steel Mills ◽  
Aisi Type ◽  
Cold Work Tool Steel

Abstract UNS No. T30407 is a high-carbon chromium cold-work tool steel containing vanadium (4.0%) and molybdenum (1.0%). Its carbon and vanadium form a vanadium carbide that provides war resistance many times greater than that of UNS No. T30403 (AISI Type D3). UNS No. T30407 was developed for applications where extreme abrasive wear is needed. Its many applications include briquetting dies and punches, brick mold liners, pottery, tools, broaches, meat-chopper plates and cold-extrusion dies. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, and machining. Filing Code: TS-439. Producer or source: Tool steel mills.

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