Low cycle fatigue, creep and creep-fatigue interaction behavior of a TiAl alloy at high temperatures

Dong, Chaofang; Yu, Huan; Jiao, Zehui; Kong, Fantao; Chen, Yuyong

doi:10.1016/j.scriptamat.2017.09.016

Cited by 27 publications

(5 citation statements)

References 17 publications

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“…Creep aging is one class of forming process with merger of creep deformation and aging of material, both improve the material properties and life time of working. is creep aging process concentrated on fabrication of aircraft panels and more integral parts [1][2][3]. Creep aging is a precision forming, used to reduce the fracture while the material is processed.…”

Section: Introductionmentioning

confidence: 99%

[Retracted] Mechanical Strength and Fatigue Fracture Analysis on Al‐Zn‐Mg Alloy with the Influence of Creep Aging Process

Ponnusamy

Pulla

Sathish

et al. 2021

Advances in Materials Science and Engineering

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The Al-Zn-Mg alloy comes under the aluminium alloy; it possesses good capability of age hardening and superior strength in contrast to other alloys. The numbers of creep aging experiments are conducted with the support of different temperature levels such as 180, 200, and 2000°C. The effects of tests are reflected on the tensile test and fatigue tests; the temperature and stress directly affects the creep characteristics, mechanical strength, and fatigue performance of the Al-Zn-Mg alloy. The time period of the creep test is maintained as 15 hrs with constant load of 200 MPa and 220 MPa. The increasing temperature increases the tensile strength and fatigue life of the Al-Zn-Mg alloy under initial condition; furthermore, continuous increment reduces the strength and fatigue existence. In the fatigue test, the fatigue span of the Al-Zn-Mg is extremely enhanced by the application of creep aging at a particular temperature. The 3D profilometry image visibly shows the influence of temperature in forming a fracture in fatigue analysis through microstructure analysis.

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Section: Introductionmentioning

confidence: 99%

[Retracted] Mechanical Strength and Fatigue Fracture Analysis on Al‐Zn‐Mg Alloy with the Influence of Creep Aging Process

Ponnusamy

Pulla

Sathish

et al. 2021

Advances in Materials Science and Engineering

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“…It has been reported that the mechanical strain rate can contribution to the fatigue life of materials at high temperature. 29,30 In the TMF tests of this investigation, the mechanical strains were varied from 0.6% to 1.2%, and the period of each cycle was consistent. For example, in Figure 3, the mechanical strain rate varied from 0.012%/ s to 0.024%/s.…”

Section: Discussionmentioning

confidence: 99%

“…In conditions where the temperature range and temperature rate are predefined, variations in the mechanical strain rate can arise from differences in the magnitudes of mechanical strain range. It has been reported that the mechanical strain rate can contribution to the fatigue life of materials at high temperature . In the TMF tests of this investigation, the mechanical strains were varied from 0.6% to 1.2%, and the period of each cycle was consistent.…”

Section: Discussionmentioning

confidence: 99%

Experimental and theoretical studies on thermo‐mechanical fatigue test for aluminium cast alloy

Zhang

Wang

Han³

et al. 2019

Fatigue Fract Eng Mat Struct

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Evaluation of the thermo‐mechanical behaviour and prediction of the service life of cast aluminium alloys are important for the design of automobile engine cylinder heads. In this study, cast Al alloy specimens are extracted from cylinder heads and subjected to in‐phase thermo‐mechanical cyclic loading. The hysteresis curves related to stress and strain were recorded under the individual thermo‐mechanical loading conditions. The number cycles to failure corresponding to multiple mechanical strain and temperature ranges were obtained. It is found that the cyclic stress amplitude decreases and the cyclic softening rate increases with increasing maximum temperature rise. A modified fatigue‐creep model based on energy conservation has been developed for prediction of the fatigue life of cylinder heads. The proposed method shows good agreement with the well‐established Ostergren model and low standard deviations. In summary, the proposed method described in this study provides an option for prediction of the thermo‐mechanical behaviour of metals.

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“…[1][2][3] Due to their low density, high-temperature specific strength, creep and oxidation resistance, and the potential for weight reduction and efficiency increase of aeroengines, titanium aluminides offer the opportunity to replace Ni-based superalloys. [4][5][6] Turbine materials are subject to cyclic mechanical loading in service. In particular, the plastic deformation caused by engine start up and shut down is a design concern of these alloys, [7] and this service condition refers to low-cycle fatigue (LCF).…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability and Lattice Strain Evolution of High‐Nb‐Containing TiAl Alloy under Low‐Cycle‐Fatigue Loading

et al. 2021

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The micromechanical behavior and the effect of temperature on the micromechanical mechanism of high‐Nb‐containing TiAl alloy during low‐cycle fatigue still remain uncertain. Herein, in situ and ex situ synchrotron‐based high‐energy X‐ray (HEXRD) experiment results reveal that the γ and ωo phases suffer compressive lattice strains but the lattice strain in the α2 phase evolves from tensile to compressive during low‐cycle fatigue at 900 °C. In addition, the three phases suffer compressive lattice strains during cooling to room temperature, which could result in larger compressive lattice strains in γ and ωo phases and the change of the lattice strain state in the α2 phase. The peak‐broadening results show γ recrystallization is dominant in the interrupted low‐cycle‐fatigue samples, whereas inhomogeneous deformation occurs in the failed low‐cycle‐fatigue samples. The performed synchrotron diffraction experiments offer a deeper insight into the phase transformations and micromechanism of TiAl alloy during low‐cycle fatigue.

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Low cycle fatigue, creep and creep-fatigue interaction behavior of a TiAl alloy at high temperatures

Cited by 27 publications

References 17 publications

[Retracted] Mechanical Strength and Fatigue Fracture Analysis on Al‐Zn‐Mg Alloy with the Influence of Creep Aging Process

[Retracted] Mechanical Strength and Fatigue Fracture Analysis on Al‐Zn‐Mg Alloy with the Influence of Creep Aging Process

Experimental and theoretical studies on thermo‐mechanical fatigue test for aluminium cast alloy

Thermal Stability and Lattice Strain Evolution of High‐Nb‐Containing TiAl Alloy under Low‐Cycle‐Fatigue Loading

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