The comparison of microstructures and mechanical properties between 14Cr-Al and 14Cr-Ti ferritic ODS alloys

Zhang, Guangming; Zhou, Zhangjian; Mo, Kun; Miao, Yinbin; Shao-fu, LI; Liu, Xiang; Wang, Man; Park, Jun-Sang; Almer, Jonathan; Stubbins, James F.

doi:10.1016/j.matdes.2016.02.117

Cited by 31 publications

(11 citation statements)

References 36 publications

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“…Considering the directionality of elastic modulus, the crystal orientation relative to the compressive direction then becomes a significant factor influencing the measured elastic modulus. and have been confirmed experimentally [30,31]. This directionality provides a large enough variation in moduli to explain the range measured in the irradiated moduli ( Figure 14).…”

Section: Elastic Modulussupporting

confidence: 71%

TEM in situ micropillar compression tests of ion irradiated oxide dispersion strengthened alloy

Yano

Swenson

et al. 2017

Journal of Nuclear Materials

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The growing role of charged particle irradiation in the evaluation of nuclear reactor candidate materials requires the development of novel methods to assess mechanical properties in nearsurface irradiation damage layers just a few micrometers thick. In situ transmission electron microscopic (TEM) mechanical testing is one such promising method. In this work, microcompression pillars are fabricated from a Fe 2+ ion irradiated bulk specimen of a model Fe-9%Cr oxide dispersion strengthened (ODS) alloy. Yield strengths measured directly from TEM in situ compression tests are within expected values, and are consistent with predictions based on the irradiated microstructure. Measured elastic modulus values, once adjusted for the amount of deformation and deflection in the base material, are also within the expected range. A pillar size effect is only observed in samples with minimum dimension ≤ 100 nm due to the low interobstacle spacing in the as received and irradiated material. TEM in situ micropillar compression tests hold great promise for quantitatively determining mechanical properties of shallow ionirradiated layers.

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Section: Elastic Modulussupporting

confidence: 71%

TEM in situ micropillar compression tests of ion irradiated oxide dispersion strengthened alloy

Yano

Swenson

et al. 2017

Journal of Nuclear Materials

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“…This step allows a homogeneous distribution of reinforcement in the matrix. The resulting powder is labelled powder M. The integration of Y2O3 and TiH2 compounds aims the formation of stable oxide particles such as Y2Ti2O7 or Y2TiO5 in the stainless steel matrix (Miller et al, 2003 ;Zhang et al, 2016). Figure 1 presents scanning electron microscope (SEM) images of the as-received matrix powder and the milled powder M. Before consolidation by SLM process, the powder M is sieved with a 80 µm mesh.…”

Section: Powder Analysismentioning

confidence: 99%

“…Some precipitates are studied more precisely to identify the oxide types formed during the SLM process ( Figure 9). According to the EDX results, the precipitate numbered 1 has a high content (Zhang et al, 2016) and…”

Section: Description Of the Nanometric Precipitation Inside Slm Buildsmentioning

confidence: 99%

Elaboration of oxide dispersion strengthened Fe-14Cr stainless steel by selective laser melting

Vasquez

Giroux

Lomello

et al. 2019

Journal of Materials Processing Technology

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et al.. Elaboration of oxide dispersion strengthened Fe-14Cr stainless steel by selective laser melting. Abstract: This study presents the influence of the main selective laser melting (SLM) processing parameters on the densification behavior and microstructure evolution of oxide dispersion strengthened (ODS) Fe-14Cr stainless steel. Optimization of the process parameters allows to manufacture ODS stainless steel parts, which present high densities up to 98% and a fine dispersion of nanosized Y-Ti rich oxide particles. Laser power and scan speed are found to strongly influence the density and the microstructure of SLM builds. The ratio power over scan speed controls the width and the depth of the molten pool. Low energy densities (i.e. a low laser power or a high scan speed), inferior to 100 J.mm -3 , cause lack of fusion of the powder and induce the presence of numerous pores. Finer microstructure can be achieved in this condition since grains receive less energy to growth. The hatch distance does not affect the density in the range of testing values. A decrease in hatch distance causes re-fusion of previous neighbor track but does not re-melt the previous layer since the ratio power over speed is kept constant when varying the hatch distance. A slight coarsening of the microstructure is observed in this case. A large range of hatch distance can be used and especially large values, which decrease the time of production. This study can be a guideline to achieve materials with specific microstructure for high temperature applications. [19] References: A. R. Jones, 2010. Historical perspective: ODS alloy development. AlMangour, B., Grzesiak, D., Borkar, T., Yang, J.-M., 2018. Densification behavior, microstructural evolution, and mechanical properties of TiC/316L stainless steel nanocomposites fabricated by selective laser melting. Materials & Design 138, 119-128. https://doi.-M., 2017. Scanning strategies for texture and anisotropy tailoring during selective laser melting of TiC/316L stainless steel nanocomposites. Journal of Alloys and Compounds 728, 424-435. https://doi., J., 2014. Selective laser melting of in situ titanium-titanium boride composites: Processing, microstructure and mechanical properties. Acta Materialia 76, 13-22. https://doi.org/10.1016/j.actamat.2014.05.022 Attar, H., Ehtemam-Haghighi, S., Kent, D., Dargusch, M.S., 2018. Recent developments and opportunities in additive manufacturing of titanium-based matrix composites: A review. International Journal of Machine Tools and Manufacture 133, 85-102. https://doi.

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“…The Williamson-Hall method [5] is a popular method to determine size and strain values from the full-width or integral breadths of a diffraction pattern [27,[42][43][44][45][46][47]. The advantage of the method is that only the fullwidth is needed so the quality of the peaks need not be as high as in some methods.…”

Section: Williamson-hallmentioning

confidence: 99%

An evaluation of diffraction peak profile analysis (DPPA) methods to study plastically deformed metals

2016

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A range of diffraction peak profile analysis (DPPA) techniques were used to determine details of the microstructure of plastically deformed alloys. Four different alloys were deformed by uniaxial tension and compression to a range of strains. The methods we have considered include, the full-width, Williamson-Hall methods, Warren-Averbach methods, and van Berkum's alternative method. Different metals were chosen to understand the effect of the deformation microstructure and crystal structure, a nickel alloy, two stainless steel alloys and two titanium alloys.

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The comparison of microstructures and mechanical properties between 14Cr-Al and 14Cr-Ti ferritic ODS alloys

Cited by 31 publications

References 36 publications

TEM in situ micropillar compression tests of ion irradiated oxide dispersion strengthened alloy

TEM in situ micropillar compression tests of ion irradiated oxide dispersion strengthened alloy

Elaboration of oxide dispersion strengthened Fe-14Cr stainless steel by selective laser melting

An evaluation of diffraction peak profile analysis (DPPA) methods to study plastically deformed metals

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