Determination of heat treatment parameters by experiments and CALPHAD for precipitate hardening of Cr-Alloys with Si, Ge and Mo

Pfizenmaier, Petra; Ulrich, Anke Silvia; Galetz, Mathias C.; Glatzel, Uwe

doi:10.1016/j.intermet.2019.106636

Cited by 8 publications

(1 citation statement)

References 35 publications

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“…For casting, a low liquidus temperature and a narrow window between liquidus temperature (T liquidus ) and solidus temperature (T solidus ) are desirable [42]. However, for high-temperature alloys (i.e., superalloys) and high-temperature HEAs (also known as high-entropy superalloys (HESA) [1]), a higher T liquidus and T solidus and also a narrow window between the two temperatures are beneficial.…”

Section: Thermodynamic Analysis Of Heat Treatmentmentioning

confidence: 99%

CALPHAD as a Toolbox to Facilitate the Development of HEAs

Wang¹,

Li²

2023

High Entropy Materials - Microstructures and Properties

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This chapter would be a comprehensive review of the successful application of the CALPHAD method in the research and development of high-entropy alloys (HEAs) in recent years. The structure of this chapter is obedient to the conventional framework in materials science, and several topics would be covered, including composition and structure design, heat treatment and solidification processing, and some properties and performances, such as mechanical and electrochemical corrosion behaviors and high-temperature oxidation characteristics. A conclusion and outlook of the CALPHAD method are also provided at the end of this chapter. Hope this chapter could offer a thermodynamic and kinetic perspective for facilitating the field of HEA research and inspire other researchers to contribute more valuable ideas and works.

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Section: Thermodynamic Analysis Of Heat Treatmentmentioning

confidence: 99%

CALPHAD as a Toolbox to Facilitate the Development of HEAs

Wang¹,

Li²

2023

High Entropy Materials - Microstructures and Properties

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Discontinuities in Oxidation Kinetics: A New Model and its Application to Cr–Si-Base Alloys

2021

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Some alloys such as many Cr-based systems show mass gain discontinuities during thermogravimetric measurements which strongly affect the oxidation kinetics. The behaviour cannot be described by the current models available in the literature. Thus, a novel $$k_\mathrm{para}$$ k para –$$k_\mathrm{lin}$$ k lin -P-model was developed to describe oxidation kinetics during the isothermal exposure of materials which show such behaviour. Beside the parabolic rate constant $$k_\mathrm{para}$$ k para and the linear mass loss constant $$k_\mathrm{lin}$$ k lin , the P-value and $$f_P$$ f P are introduced to take into account spontaneous rapid mass gains due to local oxide scale failure. The parameter P serves as a measure for the mass gain due to discontinuous events and $$f_P$$ f P is the frequency of such events. The both parameters can be related to oxide scale detachment and growth stresses. The application of the model is demonstrated for the oxidation of Cr–Si-based alloys in synthetic air at $$1200^{\circ }\hbox {C}$$ 1200 ∘ C for 100 h. For these alloys, the origin of the mass gain discontinuities is discussed and the meaning of P and $$f_P$$ f P is explained in more detail. Using this newly developed model, an insight into growth and nitridation resistance of oxide scales as well as scale adhesion is gained.

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Melting Point of Pure Cr and Phase Equilibria in the Cr-Si Binary System

Ioroi

Aono

et al. 2022

J. Phase Equilib. Diffus.

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Determination of heat treatment parameters by experiments and CALPHAD for precipitate hardening of Cr-Alloys with Si, Ge and Mo

Cited by 8 publications

References 35 publications

CALPHAD as a Toolbox to Facilitate the Development of HEAs

CALPHAD as a Toolbox to Facilitate the Development of HEAs

Discontinuities in Oxidation Kinetics: A New Model and its Application to Cr–Si-Base Alloys

Melting Point of Pure Cr and Phase Equilibria in the Cr-Si Binary System

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