Thickness influence on creep properties for Ni-based superalloy M247LC SX

Brunner, Martin; Bensch, Matthias; Völkl, Rainer; Affeldt, E.; Glatzel, Uwe

doi:10.1016/j.msea.2012.04.067

Cited by 61 publications

(17 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[20]) were cut from the single-crystal rods by wire electrodischarge machining, and then ground flat to a surface roughness of R a < 0.2 lm. The specimens were machined parallel to the axis of symmetry of the rod to coincide with the orientation resulting from the casting process.…”

Section: Creep Testingmentioning

confidence: 99%

Quantitative experimental determination of the solid solution hardening potential of rhenium, tungsten and molybdenum in single-crystal nickel-based superalloys

et al. 2015

Self Cite

View full text Add to dashboard Cite

The solid-solution hardening potential of the refractory elements rhenium, tungsten and molybdenum in the matrix of single-crystal nickel-based superalloys was experimentally quantified. Single-phase alloys with the composition of the nickel solid-solution matrix of superalloys were cast as single crystals, and tested in creep at 980°C and 30-75 MPa. The use of single-phase single-crystalline material ensures very clean data because no grain boundary or particle strengthening effects interfere with the solid-solution hardening. This makes it possible to quantify the amount of rhenium, tungsten and molybdenum necessary to reduce the creep rate by a factor of 10. Rhenium is more than two times more effective for matrix strengthening than either tungsten or molybdenum. The existence of rhenium clusters as a possible reason for the strong strengthening effect is excluded as a result of atom probe tomography measurements. If the partitioning coefficient of rhenium, tungsten and molybdenum between the c matrix and the c 0 precipitates is taken into account, the effectiveness of the alloying elements in two-phase superalloys can be calculated and the rhenium effect can be explained.

show abstract

Section: Creep Testingmentioning

confidence: 99%

Quantitative experimental determination of the solid solution hardening potential of rhenium, tungsten and molybdenum in single-crystal nickel-based superalloys

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…The cooling design has been more and more complicated and led to very thin sections in the blade. Experiments have revealed that the creep property of the blade material, i.e., Ni-based single crystal superalloys, would be different between the thin specimen and the thick one, which is known as the thickness debit effect (Brunner et al , 2012; Doner and Heckler, 1985; Seetharaman and Cetel, 2004). Most of the experiments show that the rupture life is greatly decreased and the creep rate is increased in the thin specimen when its thickness is less than 1.0 mm (Seetharaman and Cetel, 2004; Huettner et al , 2008, 2009; Cassenti and Staroselsky, 2009; Baldan, 1995).…”

Section: Introductionmentioning

confidence: 99%

Modeling of thickness effect on the creep properties of Ni-based superalloys

Wang¹,

Yao²,

Wang³

2017

MMMS

View full text Add to dashboard Cite

Purpose Specimen thickness has great influences on the creep behavior of single crystal Ni-based superalloys when it is less than 3.0 mm, which is known as thickness debit effect. Experiments have detected that oxidation can influence the microstructure of the Ni-based superalloys. Here, a model is proposed to bring in both the oxidation effect and void caused damage to account for the thickness debit effect. The paper aims to discuss these issues. Design/methodology/approach The model uses the simple Norton type creep relation to describe the creep rate evolution. The damage evolution caused by void is taken to be stress controlled. The load baring area changes are calculated with the consideration of oxidation and void evolutions. Findings Simulations on specimens with different thickness from 3.0 to 0.3 mm are carried out. The results show that the present model can reproduce the decrease of the creep strength with the decreases of the specimen thickness. The damage plays a major role in the creep behavior of the thick specimen. Both the damage and the oxidation are important for the thin specimen which should be paid attention to during the calculation of the creep response of the thin-wall turbine blade. Originality/value A model is proposed to account for the thickness debit effect on the creep behavior of Ni-based superalloys. Both oxidation influence and void caused damage are introduced. The simulation results show the capability of the model to reproduce the thickness debit effect.

show abstract

“…Although some experiments on ultrathin specimens were conducted under laboratory air conditions, [11][12][13][14][15]21 other devices integrated surface protection by the use of 'inert atmosphere'. Atmospheres often considered as 'inert' and usually employed for high-temperature experiments are: vacuum, 16,19,[24][25][26][27][28][29] high-purity argon 17 and hydrogenated argon. 30 However, 'inert atmosphere' has a different meaning from an oxidation/corrosion and mechanical point of view.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical testing of ultrathin layered material specimens at elevated temperature

Texier

Monceau

Salabura

et al. 2016

Materials at High Temperatures

View full text Add to dashboard Cite

The mechanical characterisation of ultrathin specimens at very high temperature is challenging in terms of specimen preparation and mechanical testing under 'inert' atmospheres. An experimental procedure for the local characterisation of mechanical and thermal properties at elevated temperature is presented. Various common 'inert' atmospheres were investigated up to 1373 K in order to identify the most efficient environmental conditions to prevent surface reactivity and degradation of specimens. A NiCoCrAlYTa-coated monocrystalline Ni-based superalloy was used to exemplify the capabilities of the technique because of its high surface reactivity at very high temperature, i.e. oxidation and sublimation. Purified overpressured argon atmosphere combined with oxygen getters was found to be particularly suitable for the study of alumina-forming alloys at elevated temperature.

show abstract

Thickness influence on creep properties for Ni-based superalloy M247LC SX

Cited by 61 publications

References 15 publications

Quantitative experimental determination of the solid solution hardening potential of rhenium, tungsten and molybdenum in single-crystal nickel-based superalloys

Quantitative experimental determination of the solid solution hardening potential of rhenium, tungsten and molybdenum in single-crystal nickel-based superalloys

Modeling of thickness effect on the creep properties of Ni-based superalloys

Micromechanical testing of ultrathin layered material specimens at elevated temperature

Contact Info

Product

Resources

About