Optimization of composition and heat treatment of age-hardened Pt−Al−Cr−Ni alloys

Hüller, Markus; Wenderoth, Markus; Vorberg, Stefan; Fischer, Bernd; Glatzel, Uwe; Völkl, Rainer

doi:10.1007/s11661-005-1000-8

Cited by 8 publications

(11 citation statements)

References 26 publications

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“…The mean distance between the dendrites was about 20 m. In the dendrites, the secondarily precipitated ␥Ј phase is surrounded by the primarily solidified ␥ matrix phase. The interdendritic regions consist of clusters of lamellar ␥/␥Ј phase mixture (Figure 2(b)), which has already been reported for similar as-cast Pt-base alloys by Hüller et al [24] Such clusters are referred to as ␥/␥Ј eutectics throughout this article.…”

Section: A Sem Investigations and Edxsupporting

confidence: 73%

“…In a previous investigation, [24] as-cast Pt-Al-Cr-Ni alloys with 11 at. pct Al showed low volume fractions of ␥/␥Ј eutectics.…”

Section: Discussionmentioning

confidence: 99%

“…The observed average precipitate diameters are larger than in the previously investigated Pt-Al-Cr-Ni alloys with 11 at. pct Al, [24] which showed maximum sizes of 500 nm after equivalent aging.…”

Section: A Sem Investigations and Edxmentioning

confidence: 99%

“…The ␥Ј phase appears darker than the surrounding matrix. [24] The appearance of bright edges is explained in detail by Reimer. [26] After casting, a dendritic microstructure was found in each alloy, as exemplarily shown for Pt 77 Al 14 Cr 3 Ni 6 in Figures 2(a) and (b).…”

Section: A Sem Investigations and Edxmentioning

confidence: 99%

“…In a previous study, Hüller et al [24] investigated Pt-Al-Cr-Ni alloys with constant contents of 11 at. pct Al and 3 at.…”

Section: Introductionmentioning

confidence: 99%

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On the development and investigation of quaternary Pt-based superalloys with Ni additions

Wenderoth

Glatzel

Völkl

et al. 2005

Metall Mater Trans A

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The objective of this work is to mimic the microstructure and strengthening mechanisms of Ni-based superalloys in a new group of high-temperature alloys based on the system Pt-Al. The elements Cr and Ni were chosen as further alloying components. Having a face-centered cubic (fcc) crystal structure with an L1 2 -ordered and coherently embedded phase, these new alloys should increase creep and corrosion resistance beyond Ni-based superalloys. After arc melting and heat treatment, the alloys were investigated by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD). In the aged condition, the alloy composition 13 at. pct Al, 3 at. pct Cr, 7 at. pct Ni, and balance Pt showed the most promising microstructure with cubical precipitates, 30 pct precipitate volume fraction, and a lattice misfit of about Ϫ0.1 pct at room temperature.

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Section: A Sem Investigations and Edxsupporting

confidence: 73%

“…In a previous investigation, [24] as-cast Pt-Al-Cr-Ni alloys with 11 at. pct Al showed low volume fractions of ␥/␥Ј eutectics.…”

Section: Discussionmentioning

confidence: 99%

Section: A Sem Investigations and Edxmentioning

confidence: 99%

Section: A Sem Investigations and Edxmentioning

confidence: 99%

“…In a previous study, Hüller et al [24] investigated Pt-Al-Cr-Ni alloys with constant contents of 11 at. pct Al and 3 at.…”

Section: Introductionmentioning