Contributions of Matrix and Block Boundary Strength to Hardness Change of Reduced Activation Ferritic Steel during Creep

Nanoindentation experiments and microstructural analysis were performed on advanced 12% Cr ferritic steel having extremely fine and complex martensitic microstructures, to answer unsolved questions on the contributions of grain boundaries to strengthening and aging degradation mechanisms in both as-tempered and thermally aged steels. Interesting features of the experimental results led us to suggest that among several high angle boundaries, block boundary is most effective in enhancing the macroscopic strength in as-tempered virgin sample, and that a decrease in matrix strength rather than reduction in grain-boundary strengthening effect is primarily responsible for the macroscopic softening behavior observed during thermal exposure.

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Effect of grain boundary segregation of carbon on critical grain boundary strength of ferritic steel

Scripta Materialia ◽

10.1016/j.scriptamat.2019.05.001 ◽

2019 ◽

Vol 169 ◽

pp. 38-41 ◽

Cited By ~ 8

Author(s):

S. Araki ◽

K. Mashima ◽

T. Masumura ◽

T. Tsuchiyama ◽

S. Takaki ◽

...

Keyword(s):

Grain Boundary ◽

Ferritic Steel ◽

Boundary Segregation ◽

Grain Boundary Segregation ◽

Boundary Strength

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Microanalysis of precipitates in a ferritic steel

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100110234 ◽

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.

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Drawing the Line: Validating a Measure of Work/Nonwork Boundary Strength

PsycEXTRA Dataset ◽

10.1037/e518632013-385 ◽

2004 ◽

Author(s):

Tracy D. Hecht ◽

Natalie J. Allen

Keyword(s):

Boundary Strength

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

10.26678/abcm.conem2018.con18-0454 ◽

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

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NICLOY 5

Alloy Digest ◽

10.31399/asm.ad.sa0096 ◽

1960 ◽

Vol 9 (3) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

High Temperature ◽

Low Temperature ◽

Physical Properties ◽

Tensile Properties ◽

Ferritic Steel ◽

Heat Treating ◽

Low Carbon ◽

Temperature Performance

Abstract NICLOY 5 is a low carbon, nickel ferritic steel reecommended for low temperature service. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-96. Producer or source: Babcock & Wilcox Company.

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