Rapid consolidation of nanostructured FeAl compound by high frequency induction heating and its mechanical properties

Ko, In-Yong; Jo, Seung-Hoon; Doh, Jung-Mann; Yoon, Jin‐Kook; Shon, In-Jin

doi:10.1016/j.jallcom.2010.01.148

Cited by 9 publications

(4 citation statements)

References 17 publications

(16 reference statements)

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“…FeAl intermetallic compound and its alloys are considered as one kind of the potential structural materials, especially used in aeronautics and astronautics, automobiles, and etc., owing to their excellent oxidation, corrosion and wear resistance, low density, high strength, and so on [1][2][3]. However, to develop the FeAl structural materials, two major obstacles, i.e.…”

Section: Introductionmentioning

confidence: 99%

Structural evolutions of the Fe–40Al–5Cr powders during mechanical alloying and subsequent heat treatment

Liu

Tang

Wang

et al. 2010

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Structural evolutions of the Fe–40Al–5Cr powders during mechanical alloying and subsequent heat treatment

Liu

Tang

Wang

et al. 2010

Journal of Alloys and Compounds

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“…Ratios from as low as 4:1 (Skoglund et al, 2003) to as high as to 15:1 (Kezrane et al, 2012), 20:1 (Cheng et al, 2006, 30:1 (Ko, 2010) and 50:1 (Haghighi et al, 2010) were used, although most researchers used a ball-to-powder ratio of 8:1 (Krasnowski et al, 2002(Krasnowski et al, , 2006D'Angelo et al, 2009;Abhik et al, 2008).…”

mentioning

confidence: 99%

Cold-spray coating of an Fe-40 at.% Al alloy with additions of ruthenium

Couperthwaite

Cornish

Mwamba

2016

J. South. Afr. Inst. Min. Metall.

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Previous work conducted by Mintek (Couperthwaite et al., 2013(Couperthwaite et al., , 2015 investigated the effect of precious metal additions on the structure, oxidation and corrosion properties of an Fe-40 at.% Al (FeAl) alloy. Initial work determined that additions of more than 0.5 at.% precious metal did not improve the oxidation and corrosion properties of the materials and in some cases even decreased the resistance to corrosion. Further work identified Pt and Ru as beneficial additions to the FeAl alloy. Four alloys were then produced by mechanical alloying and sintering (FeAl-0.2 at.% Pd, FeAl-0.2 at.% Ru, FeAl-0.5 at.% Ag, FeAl-0.5 at.% Pt). These alloys were all successfully produced by melting and casting and mechanical alloying sintering and it was found that the nonequilibrium processing greatly decreased the grain size of the materials compared to the ascast materials. It was found that the additions of Ru and Pt were still the most beneficial to the oxidation and corrosion properties, with Ru being considered the most beneficial.This report details the results from the initial spray testing work done with the FeAl-0.2 at.% Ru alloy powder produced by mechanical alloying. There are several options for powder coating onto substrates; thermalspray techniques, which include high-velocity oxy-fuel (HVOF) coating and plasma coating, or cold-spray (also known as supersonicspray) techniques. Cold-spray techniques have attracted a lot of interest lately and as a system is available at University of the Witwatersrand, it was decided to use cold spraying in the current work. This work was done to determine the effectiveness of cold-spray coating of these mechanically alloyed powders.The iron-aluminium system has attracted a large amount of research due to the fact that Fe-Al intermetallic compounds possess good mechanical properties, along with low density and low cost, as well as easy access to the raw materials (Ji et al., 2006;Montealegre et al., 2000). Arzhnikov et al. (2008) found that the Fe-Al alloys are promising, due to their good refractoriness, oxidation and corrosion resistance and good ductility at room temperature. In comparison to conventional alloys, Fe-Al alloys perform much better at higher temperatures, due to the stability of the Cold-spray coating of an Fe-40 at.% Al alloy with additions of ruthenium by R.A. Couperthwaite*, L.A. Cornish † ‡ and I.A. Mwamba* In previous work by the authors, it was established that additions of 0.2 at.% Ru to an Fe-40 at.% Al alloy improved the corrosion and oxidation resistance of the alloy. The alloy was produced by mechanical alloying and spark plasma sintering and the work showed that nonequilibrium processing was able to significantly refine the grain size of the material. The sintered material had a higher hardness than the as-cast material and the change in grain size did not significantly affect the oxidation and corrosion. In the present research, the mechanically alloyed powder was coated onto a mild steel substrate using cold-spray coating at ...

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“…The second step in obtaining bulk fine-grained materials is powder compaction. Several consolidation methods are available such as rapid sintering [14,15], spraying processes like high velocity oxy fuel (HVOF) [15], cold spraying [16], hot compression [17], hot isostatic pressing [18], detonation gun [19], additive manufacturing [20], and spark plasma sintering (SPS) [13][14][15][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Powder Milling on Properties of SPS Compacted FeAl

et al. 2020

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The Fe-28 at.% Al alloy was studied in this article. The aim was to describe the influence of gas atomized powder pre-milling before SPS (Spark Plasma Sintering) sintering on the structure and properties of the bulk materials. The initial powder was milled for 0.5, 1, and 8 h. It was proven that 1 h milling leads to the change in size and morphology of the particles, B2→A2 phase transformation, and to the contamination with the material from a milling vessel. Powder materials were compacted by the SPS process at 900, 1000, and 1100 °C. The differences between the bulk materials were tested by LM, SEM, and TEM microscopy, XRD, and neutron diffraction methods. It was proven that, although the structures of initial powder (B2) and milled powder (A2) were different, both provide after-sintering material with the same structure (D03) with similar structural parameters. Higher hardness and improved ductility of the material sintered from the milled powder are likely caused by the change in chemical composition during the milling process.

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Rapid consolidation of nanostructured FeAl compound by high frequency induction heating and its mechanical properties

Cited by 9 publications

References 17 publications

Structural evolutions of the Fe–40Al–5Cr powders during mechanical alloying and subsequent heat treatment

Structural evolutions of the Fe–40Al–5Cr powders during mechanical alloying and subsequent heat treatment

Cold-spray coating of an Fe-40 at.% Al alloy with additions of ruthenium

The Influence of Powder Milling on Properties of SPS Compacted FeAl

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