Microstructure and texture study on an advanced heat-resistant alloy during creep

Zhang, Yu; Jing, Hongyang; Zhao, Lei; Han, Yongdian; Liang, Jun

doi:10.1016/j.matchar.2017.05.037

Cited by 34 publications

(18 citation statements)

References 43 publications

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Section: Complementary Methodsmentioning

confidence: 99%

“…The multiscale precipitation behaviors were calculated thermodynamically and inspected by examination of the microstructure of the as-crept alloy [55]. Briefly, multiscale precipitation behaviors of Sanicro 25 during long-term creep were revealed; finedistributed nanoscale precipitates were found as the main strengthening phases of Sanicro 25 at elevated temperatures and preferred grain orientation of Sanicro 25 before and after creep under different conditions were investigated by electron back-scattered diffraction [55]. In situ neutron diffraction measurements were performed on monocrystalline samples of the Nibased superalloy CMSX-4 during N-type γ 0 raft formation under the tensile creep conditions of 1150 C/100 MPa and subsequently on a rafted sample under the low temperature/high stress creep conditions of 715 C/825 MPa.…”

Section: Complementary Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Review on Creep Analysis and Solved Problems

Monfared¹

2018

Creep

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This chapter presents a useful literature reviews and applied solved problems that focus on the creep phenomenon and behavior of it in the solids. Various insights and available studies are reviewed and investigated regarding the creep behavior analysis in three categories such as analytical, numerical and experimental methods. In addition, novel and recent findings are presented in this chapter such as predicting and obtaining the viscosity of the solids at high temperatures using steady state creep phenomenon (i.e., introducing a simulation and analogy between creeping solids and viscous fluids).

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Section: Complementary Methodsmentioning

confidence: 99%

Section: Complementary Methodsmentioning

confidence: 99%

Review on Creep Analysis and Solved Problems

Monfared¹

2018

Creep

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“…The microstructure of Laves phase and σ phase is shown in Figure 7 . [ 29 ] Sometimes, the rise of creep property in steels is resulted from fine Laves phase which hinders dislocation movement of steel. As the aging time is prolonged, the quantity and size increase, making the performance deteriorate.…”

Section: Precipitationmentioning

confidence: 99%

Precipitation and Properties at Elevated Temperature in Austenitic Heat‐Resistant Steels—A Review

Wang

Wei

et al. 2020

steel research int.

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The austenitic heat‐resistant steels are significant materials used in boilers and nuclear reactors, owing to the excellent creep, fatigue, corrosion resistance, and mechanical properties. The precipitation and properties degenerate with the increasing temperature. It is necessary to clarify the main precipitation and properties under the service situation. Herein, the characteristic of main precipitation and the potential degraded mechanism of creep, fatigue, oxidation resistance, and corrosion resistance at high temperature are briefly reviewed. The main secondary phases under prolonged service environment include MX phase, M23C6 carbide, Z phase, Laves phase, and σ phase. Precipitation scattered uniformly is conductive to strength properties of steel and vice versa. Coarsening precipitation and the decrease of dislocation density are critical reason for the deteriorated mechanical properties at high temperature. The protective oxide films destroyed after exposure to boiler gas lead to failure of materials.

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“…From the newly developed austenitic steels, the highest interest was devoted to advanced austenitic stainless steels such as NF709, H3RC and Sanicro 25. Originally, the creep resistance was investigated 2,29–32 . The basic study of the low cycle fatigue with constant strain rate at constant ambient and high temperature of Sanicro 25 (isothermal fatigue [IF]) 33 and the study of its cyclic stress–strain response using statistical theory of the hysteresis loop 34 started a number of more thorough studies of this material.…”

Section: Introductionmentioning

confidence: 99%

The effect of dwell on thermomechanical fatigue in superaustenitic steel Sanicro 25

Petráš

Šulák

Polák

2020

Fatigue Fract Eng Mat Struct

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Superaustenitic steel Sanicro 25 has been subjected to out‐of‐phase thermomechanical fatigue cycles with 10‐min dwell at peak temperature in the temperature range from 250°C to 700°C. The effect of the dwells on the cyclic response, internal structure and damage mechanism was studied. Cyclic hardening/softening curves, cyclic stress–strain curves and fatigue life curves were evaluated. The internal structure and nanoparticles representing the obstacles for dislocation motion were analysed and identified by energy dispersive X‐ray spectroscopy in scanning transmission electron microscope. Scanning electron microscopy combined with focused ion beam and electron backscatter diffraction was adopted to reveal the respective mechanisms responsible for fatigue crack nucleation and propagation. Effect of dwells in in‐phase and in out‐of‐phase cycling on the fatigue behaviour, on the modification of internal structure and damage mechanisms, were analysed and discussed.

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Microstructure and texture study on an advanced heat-resistant alloy during creep

Cited by 34 publications

References 43 publications

Review on Creep Analysis and Solved Problems

Review on Creep Analysis and Solved Problems

Precipitation and Properties at Elevated Temperature in Austenitic Heat‐Resistant Steels—A Review

The effect of dwell on thermomechanical fatigue in superaustenitic steel Sanicro 25

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