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Elastic moduli and thermal expansion coefficients of medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy

Laplanche, G. ; Gadaud, P. ; Bärsch, C. ; Demtröder, K. ; Reinhart, C. ; Schreuer, J. ; George, E.P.

Journal of alloys and compounds, 2018-05, Vol.746 (C), p.244-255 [Periódico revisado por pares]

Lausanne: Elsevier B.V

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Título:
Elastic moduli and thermal expansion coefficients of medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy
Autor: Laplanche, G. ; Gadaud, P. ; Bärsch, C. ; Demtröder, K. ; Reinhart, C. ; Schreuer, J. ; George, E.P.
Assuntos: Acoustics ; Automatic ; Biomechanics ; Body centered cubic lattice ; Chemical Sciences ; CoCrFeMnNi ; Crystal structure ; Crystallography ; Elastic constants ; Electric power ; Electromagnetism ; Engineering Sciences ; Entropy ; Face centered cubic lattice ; Fluid mechanics ; High entropy alloys ; Material chemistry ; Materials and structures in mechanics ; MATERIALS SCIENCE ; Mathematical Physics ; Mechanics ; Microstructure ; Modulus of elasticity ; Physics ; Polymers ; Precipitates ; Quantum Physics ; Reactive fluid environment ; Shear modulus ; Solid solutions ; Solution strengthening ; Structural analysis ; Texture ; Thermal expansion ; Thermal expansion coefficient ; Thermics ; Vibrations
É parte de: Journal of alloys and compounds, 2018-05, Vol.746 (C), p.244-255
Notas: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
AC05-00OR22725
Descrição: Elastic moduli of a set of equiatomic alloys (CrFeCoNi, CrCoNi, CrFeNi, FeCoNi, MnCoNi, MnFeNi, and CoNi), which are medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy were determined as a function of temperature over the range 293 K–1000 K. Thermal expansion coefficients were determined for these alloys over the temperature range 100 K–673 K. All alloys were single-phase and had the face-centered cubic (FCC) crystal structure, except CrFeNi which is a two-phase alloy containing a small amount of body-centered cubic (BCC) precipitates in a FCC matrix. The temperature dependences of thermal expansion coefficients and elastic moduli obtained here are useful for quantifying fundamental aspects such as solid solution strengthening, and for structural analysis/design. Using the above results, the yield strengths reported in literature for these alloys were normalized by their shear moduli to reveal the influence of shear modulus on solid solution strengthening. [Display omitted] •CrFeCoNi, CrCoNi, CrFeNi, FeCoNi, MnCoNi, MnFeNi and CoNi alloys were processed.•After recrystallization, all alloys are single-phase FCC, except CrFeNi (FCC+BCC).•All alloys are nearly untextured after recrystallization.•First report of the thermal expansion coefficient between 100 and 673 K.•Elastic moduli measured between 293 and 1000 K are reported for the first time.
Editor: Lausanne: Elsevier B.V
Idioma: Inglês

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Elastic moduli and thermal expansion coefficients of medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy

Laplanche, G. ; Gadaud, P. ; Bärsch, C. ; Demtröder, K. ; Reinhart, C. ; Schreuer, J. ; George, E.P.

Lausanne: Elsevier B.V

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