Influence of solidification variables on the microstructure, macrosegregation, and porosity of directionally solidified Mar-M247

Whitesell, H.S; Overfelt, Ruel A.

doi:10.1016/s0921-5093(01)01264-3

Cited by 66 publications

(34 citation statements)

References 18 publications

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“…Similar results were also reported in the earlier works [1,[5][6][7][8][16][17][18][19][20]. The trendline equation:…”

Section: Resultssupporting

confidence: 89%

“…5a) resulting in a low value of correlation coefficient (R 2 = 0.49). This deviation can be rationalized based on the significant variation of the thermal gradient along the axis of samples solidified at both cooling rates (Table 1) in contrast to the earlier investigations [1,[6][7][8] which were carried out at the constant thermal gradient. Therefore, the effect of thermal gradient on the SDAS should not be ignored in our analysis.…”

Section: Resultsmentioning

confidence: 89%

“…Ni-based superalloys encompass complex alloy systems and have been widely used in advanced aircraft engines due to increased high-temperature strength and oxidation resistance [1,2]. Fundamental studies have investigated the effect of solidification parameters on the microstructure of Ni-based superalloys [3].…”

Section: Introductionmentioning

confidence: 99%

“…Numerous studies have been carried out to investigate the effect of the processing parameters on SDAS [1,3,[5][6][7][8]. However, directional solidification methods such as the Bridgman method [1,6,7] and the liquid metal cooling (LMC) technique [8] were used in these studies where solidification rate and thermal gradient are maintained constant during the solidification process. There are many parts in aero engines which are produced by investment casting and exhibit a polycrystalline microstructure [9].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of solidification parameters on the secondary dendrite arm spacing in MAR M-247 superalloy determined by a novel approach

Milenković

Rahimian

Sabirov

et al. 2014

MATEC Web of Conferences

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Abstract. The effect of solidification parameters on the secondary dendrite arm spacing in a MAR-M247 Nibased superalloy has been studied by a novel approach, based on physical simulation of melting/solidification experiment with a constant cooling rate and variable temperature gradient. The applied experimental method proved to be efficient as it yielded a spread of microstructures corresponding to a range of well controlled solidification rates in a single melting/solidification experiment. In addition, it has been demonstrated that secondary dendrite arm spacing is better related to the solidification rate than to the cooling rate in the case when significant variations of thermal parameters during the solidification process occur.

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“…Similar results were also reported in the earlier works [1,[5][6][7][8][16][17][18][19][20]. The trendline equation:…”

Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of solidification parameters on the secondary dendrite arm spacing in MAR M-247 superalloy determined by a novel approach

Milenković

Rahimian

Sabirov

et al. 2014

MATEC Web of Conferences

View full text Add to dashboard Cite

show abstract

“…However, this requires the application of more durable and also costlier materials. In this regard, nickel-based superalloys have evolved into complex alloy systems with exceptional high-temperature strength, creep resistance, and fatigue behaviour [2][3][4][5][6][7][8][9]. Second-generation polycrystalline cast superalloy MAR-M247 becomes a perspective material that satisfactorily covers the needs of small power facilities and aircraft engines, and in the near future, it may fully replace material IN713 LC used so far.…”

Section: Introductionmentioning

confidence: 99%

High-temperature low-cycle fatigue behaviour of HIP treated and untreated superalloy MAR-M247

Šulák¹,

Obrtlík²,

Čelko³

2016

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The effect of hot isostatic pressing (HIP) treatment on high-temperature low cycle fatigue (LCF) behaviour of γ precipitation strengthened nickel-based superalloy MAR-M247 was studied. Microstructural observations revealed coarse-grained dendritic structure with an average grain size of 2.1 mm. Distribution and size of casting defects were assessed on cross sections of both HIP treated and untreated MAR-M247. Shape and size of precipitates were documented. Vickers hardness tests did not reveal differences between both materials. Untreated specimens were cyclically strained under total strain control at 900• C. Likewise, tests were performed on the HIP treated material at temperatures of 900 and 950• C. The stress--strain response was recorded. Coffin-Manson and Basquin fatigue life curves were established. HIP treatment leads to an increase of lifetime in comparison with the untreated material. Precipitate depleted zone was observed and crack initiation sites were identified. Dislocation arrangements were studied in TEM. Planar bands containing antiphase boundaries were observed.K e y w o r d s : hot isostatic pressing, Ni-based superalloy, high-temperature low cycle fatigue, fatigue life curves, dislocation structures, planar bands

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Mechanical Properties, Microstructural Features, and Correlations with Solidification Rates of Al–Cu–Si Ultrafine Eutectic Alloys

et al. 2021

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Due to their optimized mechanical properties under rapid solidification, Al-Cu-Si ultrafine eutectic alloys have been highlighted. The literature does not, however, establish correlations between thermal solidification parameters, mechanical properties, and microstructures of these alloys. Knowledge of cooling rates and growth rates and their associations with mechanical properties of Al-Cu-Si ultrafine eutectic alloys can guide the search for controlled and optimized processing conditions. Considering these issues, the present study analyzes the correlations between microstructures and mechanical properties of Al-15 wt% Cu-7 wt% Si, Al-22 wt% Cu-7 wt% Si, and Al-26 wt% Cu-7 wt% Si alloys produced by centrifugal casting in a copper mold. For this, Al-Cu-Si alloys' samples with a stepped solidified form are subjected to microstructural assessment and mechanical properties characterization methods. The results show the existence of phases such as Al-rich, Si, and Al 2 Cu in different proportions for each cylindrical casting part. Eutectic bimodal structures have been observed. With the increase in either alloy Cu content or solidification cooling rate, increase in hardness is observed. However, the compressive strength is shown to be unaffected by the microstructural scale. These variations are discussed to guide the best balance of properties. Samples of the Al-26 wt% Cu-7 wt% Si alloy produced under eutectic growth rates between 0.8 and 1.2 mm s À1 are those with superior properties.

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Influence of solidification variables on the microstructure, macrosegregation, and porosity of directionally solidified Mar-M247

Cited by 66 publications

References 18 publications

Effect of solidification parameters on the secondary dendrite arm spacing in MAR M-247 superalloy determined by a novel approach

Effect of solidification parameters on the secondary dendrite arm spacing in MAR M-247 superalloy determined by a novel approach

High-temperature low-cycle fatigue behaviour of HIP treated and untreated superalloy MAR-M247

Mechanical Properties, Microstructural Features, and Correlations with Solidification Rates of Al–Cu–Si Ultrafine Eutectic Alloys

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