Structure heredity, aging and stability of strengthening of Cr–Ni maraging steels

Prokoshkina, V. G.; Капуткина, Л. М.

doi:10.1016/j.msea.2006.02.075

Cited by 13 publications

(7 citation statements)

References 1 publication

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“…This is called abnormal a to g transformation, g grain memory [1] or structure heredity. [2,3] In this paper, it is called as g grain memory. Therefore, refining the austenite grain size can be called suppressing g grain memory.…”

Section: Introductionmentioning

confidence: 99%

γ Grain Memory in X12CrMoWVNbN10‐1‐1 Steel

Tao

Han

2015

steel research int.

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γ grain memory of X12CrMoWVNbN10‐1‐1 steel is investigated in order to clarify its mechanism from the viewpoint of the roles of retained γ. “isothermal transformation” is proposed to suppress the γ grain memory. The microstructure characterization during the isothermal transformation is carried out. By in situ optical microscopy observation, the acicular γ grains and globular γ grains nucleated in the interior of prior γ grains and along the prior γ grain boundaries or packet boundaries, respectively, when the sample with martensite matrix is reheated. The coarse γ grains are formed by the growth, impingement and coalescence of acicular γ grains with retained γ between martensite lath. The mechanism of suppressing γ grain memory by isothermal transformation is also discussed. It is demonstrated that the γ grain memory could be suppressed by decreasing the volume fraction (fγ) of retained γ before reheating. The critical upper limit fγ to suppress γ grain memory effectively is approximately 3.2%.

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Section: Introductionmentioning

confidence: 99%

γ Grain Memory in X12CrMoWVNbN10‐1‐1 Steel

Tao

Han

2015

steel research int.

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“…6a and c. It should be noted that due to highly strained specimen, any grain boundary angles below 2°were excluded in the calculation. Most of the previous studies on martensitic structures of steel showed uniform and homogenous microstructure with straight grain boundaries and small lath width deviations [3,[7][8][9][10][11][12]15]. In the current study, from the high-magnified TKD maps, it appears that a small degree of grain boundary undulation of the martensite laths at nano-scale exists and the microstructure is not homogenous.…”

Section: Resultsmentioning

confidence: 52%

“…The blocks contain several martensitic laths which typically have similar crystal orientations [9,10]. Various micro/nano-analytical tools were employed to characterise the complex deformed martensitic microstructure of steels including Scanning Electron Microscope (SEM), Transmission Electron Microscopy (TEM) and Electron Backscatter Diffraction (EBSD) [3,[9][10][11][12][13][14][15]. Moreover, it is widely reported that EBSD can be used to characterise fine-grained microstructure, with grain sizes down to the sub-micron scale [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique

et al. 2015

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“…The standard maraging steel contains "18% Ni, 8% Co, 5% Mo and 0.4% Ti", but Ni, Co and Mo are expensive elements, this keeps the steels rather expensive, preventing wider selection and application [3] [4]. Therefore, developing cobalt-free maraging steel with reduced quantities of expensive alloying elements to lower the production cost has been an important direction of maraging steels research [5].…”

Section: Introductionmentioning

confidence: 99%

A Study of Neutron and Gamma-Ray Interaction Properties with Cobalt-Free Highly Chromium Maraging Steel

Kassab

El-Kameesy²,

Eissa³

2015

JMP

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Cobalt-free maraging steels of different compositions have been prepared by electro-slag remelting technique using titanium and chromium instead of cobalt. Neutron removal cross-sections have been calculated, also mass attenuation coefficients and effective electron densities have been determined for the prepared samples in the photon energy range up to 2.8 MeV. Other steel alloys and lead samples have also been investigated for the sake of comparison. The results prove the superiority of cobalt-free maraging steels compared with the other steel types to be used as a proper shielding material in the nuclear field. Among the investigated steels, the steel "0.045%C-13.35%Ni-2.05%Cr-4.5%Mo-0.06%Ti" has the best attenuation properties.

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Structure heredity, aging and stability of strengthening of Cr–Ni maraging steels

Cited by 13 publications

References 1 publication

γ Grain Memory in X12CrMoWVNbN10‐1‐1 Steel

γ Grain Memory in X12CrMoWVNbN10‐1‐1 Steel

Nanostructure characterisation of flow-formed Cr–Mo–V steel using transmission Kikuchi diffraction technique

A Study of Neutron and Gamma-Ray Interaction Properties with Cobalt-Free Highly Chromium Maraging Steel

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