Evolution of Non-metallic Inclusions in Solid Fe–Al–Ti–N Alloy During Heating

Matsuura, Hiroyuki; Choi, Won Jin; Kamimura, Gen

doi:10.1007/978-3-319-51340-9_19

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…Many investigations show that inclusions (incoherent precipitates), which are formed during production [1][2][3], can significantly affect mechanical, corrosion, deformation, machining properties of steels and alloys. This has, for example, been reported with respect to low alloyed steels and carbon steels [4][5][6], stainless steels [7][8][9][10], and other alloys [11][12][13].…”

Section: Introductionmentioning

confidence: 81%

Effect of Inclusions on the Corrosion Properties of the Nickel-Based Alloys 718 and EP718

Alekseeva

Karasev

Jönsson

et al. 2020

Metals

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Inclusions in steels and alloys are known to lower the resistance to deformation, as well as to lower the mechanical, corrosion and other properties. Studies of inclusions in nickel-based alloys are important since these materials could suffer from corrosion degradation in harsh operational conditions. This, in fact, could lead to a pitting initiation around the inclusions. Two industrial Ni-based alloys (alloy 718 and EP718) were investigated to determine the harmful effects of different inclusions on the corrosion resistance of Ni-based alloys. Specifically, the inclusion characteristics (such as composition, morphology, size, number and location) were determined for inclusions collected on film filters after electrolytic extraction and dissolution of a metal matrix around different inclusions on surfaces of metal samples after electrolytic extraction (EE). It was found that both Ni-based alloys contain various inclusion types: carbides (large size NbTi-C and small multicomponent carbides), nitrides TiNb-N and sulphides (TiNb-S in EP718 alloy). The most harmful effects on the corrosion resistance of metal were detected around sulphides and small carbides containing Mo, W, Cr. Dissolution effects were also observed around large carbides and nitrides, especially around inclusions larger than 10 µm. Moreover, the dissolution of a matrix around inclusions and clusters located on the grain boundaries were found to be 2.1–2.7 times larger compared to inclusions found inside of grains of the given alloy samples.

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Section: Introductionmentioning

confidence: 81%

Effect of Inclusions on the Corrosion Properties of the Nickel-Based Alloys 718 and EP718

Alekseeva

Karasev

Jönsson

et al. 2020

Metals

View full text Add to dashboard Cite

show abstract

“…Many investigations show that inclusions (incoherent precipitates) that are formed during production [1,2,3] can significantly affect mechanical, corrosion, deformation, machining properties of steels and alloys that were shown for low alloyed steels and carbon steels [4,5,6], stainless steels [7,8,9,10] and alloys [ 11,12]. Main reasons of the effects concerned to voids or additionally stressed zones between matrix and inclusions that lead to the formation of microcracks and their propagation in a metal matrix.…”

Section: Introductionmentioning

confidence: 99%

Effect of Inclusions on the Corrosion Properties of Nickel Based Alloys 718 and EP718

Alekseeva¹,

Karasev²,

Jönsson³

et al. 2020

Preprint

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Inclusions in steels and alloys are known as factors that could lower deformation, mechanical, corrosion and other properties. Study of inclusions in nickel based alloys is important since these materials could suffer from corrosion degradation in harsh operational conditions, where inclusions could lead to a pitting initiation. For estimation of a harmful effect of different inclusions on corrosion resistance of Ni-based alloys, inclusion characteristics (such as composition, morphology, size, number and location) on film filter and dissolution of metal matrix around different inclusions on surfaces of metal samples after electrolytic extraction (EE) were investigated in two samples of industrial Ni-based alloys (alloy 718 and EP718). It was found that both Ni-based alloys have various inclusions: carbides (large size NbTi-C and small multicomponent carbides), nitrides TiNb-N and sulfides (TiNb-S in EP718 alloy). The higher harmful effect on corrosion resistance of metal was detected around sulfides and small carbides containing Mo, W, Cr. Dissolution effect was also observed around large carbides and nitrides, especially around inclusions having size more than 10 µm. Moreover, the dissolution of metal matrix around inclusions and clusters located on the grain boundaries is 2.1-2.7 times larger compared to that for those inclusions inside of grains of the given alloy samples.

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Evolution of Non-metallic Inclusions in Solid Fe–Al–Ti–N Alloy During Heating

Cited by 2 publications

References 7 publications

Effect of Inclusions on the Corrosion Properties of the Nickel-Based Alloys 718 and EP718

Effect of Inclusions on the Corrosion Properties of the Nickel-Based Alloys 718 and EP718

Effect of Inclusions on the Corrosion Properties of Nickel Based Alloys 718 and EP718

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