Journal articles: 'Thermo-Mechanical Fatigue'

1

OKAZAKI, Masakazu. "II : Fundamentals of Thermo-Mechanical Fatigue." Journal of the Society of Materials Science, Japan 56, no. 2 (2007): 190–96. http://dx.doi.org/10.2472/jsms.56.190.

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Sehitoglu, Huseyin. "Constraint Effect in Thermo-Mechanical Fatigue." Journal of Engineering Materials and Technology 107, no. 3 (July 1, 1985): 221–26. http://dx.doi.org/10.1115/1.3225805.

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Many structural members in service experience fluctuating loads and temperatures. Thermal stresses devlop on a contrained element if the temperature is cycled. Constraint exists in structural components due to temperature gradient, material anisotropy, and geometry effects. The equilibrium and compatibility equations determine the degree of constraint on the critcal component of the body. A two-bar structure is employed in this study to simulate different constraint conditions encountered in practice. The constraint types are termed (a) total, (b) partial, (c) over, and (d) notch constraint. Thermo-mechanical fatigue test results indicate that the fatigue lives decrease severely with increasing constraint, increasing temperature range and with the presence of notch or a defect.

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Lee, Jeong Min, Dong Keun Lee, Jae Mean Koo, and Chang Sung Seok. "Evaluation on Thermo-Mechanical Fatigue Life of IN738LC Using Finite Element Analysis." Applied Mechanics and Materials 467 (December 2013): 20–23. http://dx.doi.org/10.4028/www.scientific.net/amm.467.20.

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In this paper, thermo-mechanical fatigue tests were performed for the nickel-based super alloy IN738LC, after which the thermo-mechanical fatigue life was evaluated using finite element analysis. Nickel-based super alloy is used as the main material of turbine blades, which are important equipment in thermal power generation plants. In general, such materials receive three types of damage under thermo-mechanical fatigue loading. In the case of low-cycle fatigue behavior in which large plastic deformation mainly occurs, the lifetime can be decided by its relationship with the plastic strain amplitude. In order to obtain the plastic strain amplitude from the measured strain amplitude, a hysteresis loop should be derived. However, low-cycle fatigue tests are difficult. Moreover, precise experimental techniques are required to obtain the hysteresis loops. In this study, after thermo-mechanical fatigue tests were performed, thermal mechanical fatigue tests on IN738LC were simulated using finite element analysis. The results of analysis were verified by comparing with the hysteresis loops of an experiment

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Hyun, Jung Seob, Gee Wook Song, and Young Shin Lee. "Life Prediction of Thermo-Mechanical Fatigue for Nickel Based Superalloy IN738LC." Key Engineering Materials 326-328 (December 2006): 953–56. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.953.

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An experimental program has been carried out to address the thermo-mechanical fatigue life of the uncoated IN738LC nickel-base superalloy. High temperature isothermal Fatigue and out-of-phase(OP), in-phase(IP) TMF experiments in strain control were performed on superalloy materials. Temperature interval of 450-850 was applied to thermo-mechanical fatigue tests. The stress-strain response and the life cycle of the material were measured during the test. The plastic strain energy based life pediction models were applied to the stress-strain history effect on the thermo-mechanical fatigue lives.

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Boismier, D. A., and Huseyin Sehitoglu. "Thermo-Mechanical Fatigue of Mar-M247: Part 1—Experiments." Journal of Engineering Materials and Technology 112, no. 1 (January 1, 1990): 68–79. http://dx.doi.org/10.1115/1.2903189.

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Isothermal fatigue tests, out-of-phase and in-phase thermo-mechanical fatigue tests were performed on Mar-M247 nickel-based superalloy. The experiments were conducted in the temperature range 500°C to 871°C. Results indicate that the lives differ with strain-temperature phasing and with strain rate. The results of out-of-phase thermo-mechanical tests correspond well with strain-life data of isothermal tests conducted at the peak temperature (871°C). However, the in-phase thermo-mechanical results differed depending on the strain amplitude. Significant surface and crack tip oxidation and gamma prime depletion has been observed based on metallographic and Auger Spectroscopic analyses. These changes were measured as a function of time. The environment induced changes significantly influenced the fatigue lives in isothermal and out-of-phase thermo-mechanical fatigue cases. In these cases transgranular cracking was observed. Grain boundary crack nucleation and grain boundary crack growth dominated the in-phase thermo-mechanical fatigue cases. Based on these observations the requirements for a life prediction model are outlined. The life prediction model and the predictions are given in Part 2 of this paper.

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Hyun, Jung Seob, Gee Wook Song, and Young Shin Lee. "Thermo-Mechanical Fatigue of the Nickel Base Superalloy IN738LC for Gas Turbine Blades." Key Engineering Materials 321-323 (October 2006): 509–12. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.509.

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A more accurate life prediction for gas turbine blade takes into account the material behavior under the complex thermo-mechanical fatigue (TMF) cycles normally encountered in turbine operation. An experimental program has been carried out to address the thermo-mechanical fatigue life of the IN738LC nickel-base superalloy. High temperature out-of-phase and in-phase TMF experiments in strain control were performed on superalloy materials. Temperature interval of 450-850 was applied to thermo-mechanical fatigue tests. The stress-strain response and the life cycle of the material were measured during the test. The mechanisms of TMF damage is discussed based on the microstructural evolution during TMF. The plastic strain energy based life pediction models were applied to the stress-strain history effect on the thermo-mechanical fatigue lives.

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Bardenheier, Reinhard, and Graham Rogers. "Experimental Simulation of Complex Thermo-Mechanical Fatigue." Key Engineering Materials 326-328 (December 2006): 1019–22. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1019.

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Fatigue damage plays an increasingly important role in the design of various safety critical components that are exposed simultaneously to thermal and mechanical loads. Non-isothermal conditions, as these are to be found in turbine components, rocket engines, but also in high-speed machining tools makes the understanding even more complex. As the nature of those loading histories is mostly multiaxial, design engineers are interested in material models, which take into account the complexity of stress state and temperature history as well. The experimental validations of those models require specially designed test set-ups. The basic concepts of experimental techniques to perform non-isothermal, uniaxial fatigue tests will be described in general. Test systems, capable to simulate non-isothermal multiaxial stress states are presented. A new miniaturised electrothermalmechanical test rig, which allows testing of small specimens under complex thermomechanical loading conditions, will be discussed.

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Šeruga, Domen, Matija Fajdiga, and Marko Nagode. "Creep Damage Calculation for Thermo Mechanical Fatigue." Strojniški vestnik – Journal of Mechanical Engineering 57, no. 05 (May 15, 2011): 371–78. http://dx.doi.org/10.5545/sv-jme.2010.108.

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SAKANE, Masao. "III : Thermo-Mechanical Fatigue in Electronic Devices." Journal of the Society of Materials Science, Japan 56, no. 3 (2007): 302–8. http://dx.doi.org/10.2472/jsms.56.302.

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10

Pretty, Christopher, Mark Whitaker, and Steve Williams. "Thermo-Mechanical Fatigue Crack Growth of RR1000." Materials 10, no. 1 (January 4, 2017): 34. http://dx.doi.org/10.3390/ma10010034.

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Hähner, Peter, and Johan Bressers. "Thermo-mechanical fatigue: the route to standardization." Materials at High Temperatures 19, no. 4 (December 2002): 235–40. http://dx.doi.org/10.1179/mht.2002.027.

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EVANS, W., J. SCREECH, and S. WILLIAMS. "Thermo-mechanical fatigue and fracture of INCO718." International Journal of Fatigue 30, no. 2 (February 2008): 257–67. http://dx.doi.org/10.1016/j.ijfatigue.2007.01.041.

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13

Li, Dao-Hang, De-Guang Shang, Jin Cui, Luo-Jin Li, Ling-Wan Wang, Cheng-Cheng Zhang, and Bo Chen. "Fatigue–oxidation–creep damage model under axial-torsional thermo-mechanical loading." International Journal of Damage Mechanics 29, no. 5 (November 19, 2019): 810–30. http://dx.doi.org/10.1177/1056789519887217.

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A fatigue–oxidation–creep damage model that can take into account the effect of multiaxial cyclic feature on the damage mechanism is proposed under axial-torsional thermo-mechanical fatigue loading. In the proposed model, the effects of non-proportional additional hardening on fatigue, oxidation, and creep damages are considered, and the variation of oxidation damage under different high temperature loading conditions is also described. Moreover, the intergranular creep damage needs to be equivalent to the transgranular damage before accumulating with the fatigue and oxidation damages. The fatigue, oxidation, and creep damages can be expressed as the fractions of fatigue life, critical crack length, and creep rupture time, respectively, which allows the linear accumulation of different types of damages on the basis of life fraction rule. In addition, the proposed model is validated by various fatigue experimental results, including uniaxial thermo-mechanical fatigue, axial-torsional thermo-mechanical fatigue, and isothermal axial-torsional fatigue under proportional and non-proportional loadings. The results showed that the errors are within a factor of 2.

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14

Sehitoglu, Huseyin, and D. A. Boismier. "Thermo-Mechanical Fatigue of Mar-M247: Part 2—Life Prediction." Journal of Engineering Materials and Technology 112, no. 1 (January 1, 1990): 80–89. http://dx.doi.org/10.1115/1.2903191.

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A life prediction model is proposed based on microstructural observations of damage in thermo-mechanical fatigue and isothermal fatigue experiments on Mar-M247 Nickel based Superalloy. The model incorporates damage accumulation due to fatigue, environment (oxidation and γ′ depletion), and creep processes. The model is capable of predicting lives at different temperatures, strain rates and temperature-strain phasing conditions. The model successfully predicted the shorter lives at high strain amplitudes in in-phase thermo-mechanical fatigue cases and the shorter lives at lower strain amplitudes in out-of-phase thermo-mechanical fatigue cases and the associated crossover in life. The prediction of a nonproportional strain-temperature history (diamond shaped) was very satisfactory. A unified constitutive equation was utilized to predict the stresses, which influenced the creep damage term. The oxidation term is a function of mechanical strain range, temperature-strain phasing and incorporated oxidation and γ′ depletion kinetics.

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15

Ren, Yan-Ping, De-Guang Shang, Fang-Dai Li, Dao-Hang Li, Zhi-Qiang Tao, and Cheng-Cheng Zhang. "Life prediction approach based on the isothermal fatigue and creep damage under multiaxial thermo-mechanical loading." International Journal of Damage Mechanics 28, no. 5 (July 20, 2018): 740–57. http://dx.doi.org/10.1177/1056789518789221.

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Based on the isothermal fatigue and creep damage, a life prediction approach under multiaxial thermo-mechanical loading was proposed in this investigation. In the proposed method, the multiaxial thermo-mechanical fatigue damage during one cycle period was divided into the isothermal fatigue damage and the creep damage. In order to evaluate conservatively, the isothermal fatigue damage during one cycle period was calculated by using multiaxial fatigue damage model at the maximum temperature during the whole period, and the creep damage during one cycle period was calculated by accumulating the creep damage of all portions originated from the divided time history for the axial load component and temperature history. The life prediction results by the proposed model showed a good agreement with experimental data for nickel-base alloy GH4169 and cobalt-base Haynes188 under axial-torsional thermo-mechanical loading.

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16

Gürgen, Selim, İsmail Saçkesen, and Melih Cemal Kuşhan. "Fatigue and corrosion behavior of in-service AA7075 aircraft component after thermo-mechanical and retrogression and re-aging treatments." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 233, no. 9 (July 3, 2018): 1764–72. http://dx.doi.org/10.1177/1464420718784629.

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Fatigue crack growth and corrosion are the two important failure mechanisms for aircraft structural components and, therefore, various treatments have been developed to improve the fatigue and corrosion resistance of aircraft materials. In the present study, thermo-mechanical and retrogression and re-aging treatments were applied to AA7075T7352 specimens, which were extracted from a nearly 40 years in-service F-4 Phantom component. The in-service component was selected in order to observe the influence of thermo-mechanical and retrogression and re-aging treatments on the properties of a used aircraft material and it was expected that the service life of the material is extended in the maintenance stage. In the experimental work, electrical, mechanical, fatigue crack growth, and corrosion tests were carried out using the specimens with T7352 (as-received), thermo-mechanical and retrogression and re-aging conditions. Based on the results, fatigue crack growth resistance of the material benefited from the thermo-mechanical and retrogression and re-aging treatments; however, both treatments lowered the corrosion resistance of the material.

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17

Jacques, S., M. Lynch, A. Wisbey, S. Stekovic, and S. Williams. "Development of fatigue crack growth testing under thermo-mechanical fatigue conditions." Materials at High Temperatures 30, no. 1 (March 2013): 49–61. http://dx.doi.org/10.3184/096034013x13631093463744.

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18

Klingelhöffer, Hellmuth. "Introduction: 2nd International Workshop on Thermo-mechanical Fatigue." Materials at High Temperatures 30, no. 1 (March 2013): 1. http://dx.doi.org/10.3184/096034013x13644068745411.

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19

Roger, Frédéric, and Alexander Chidley. "Thermo-mechanical fatigue design of automotive heat exchangers." European Journal of Computational Mechanics 22, no. 2-4 (August 2013): 228–35. http://dx.doi.org/10.1080/17797179.2013.820895.

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20

NAGODE, M., M. HACK, and M. FAJDIGA. "High cycle thermo-mechanical fatigue: Damage operator approach." Fatigue & Fracture of Engineering Materials & Structures 32, no. 6 (June 2009): 505–14. http://dx.doi.org/10.1111/j.1460-2695.2009.01353.x.

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NAGODE, M., M. HACK, and M. FAJDIGA. "Low cycle thermo-mechanical fatigue: damage operator approach." Fatigue & Fracture of Engineering Materials & Structures 33, no. 3 (March 2010): 149–60. http://dx.doi.org/10.1111/j.1460-2695.2009.01424.x.

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22

ITO, Akihiro, and Yukio KAGIYA. "Thermo-Mechanical Fatigue Properties of Corrosion Resistance Coatings." Proceedings of the 1992 Annual Meeting of JSME/MMD 2003 (2003): 455–56. http://dx.doi.org/10.1299/jsmezairiki.2003.0_455.

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23

Hornbogen, E. "Review Thermo-mechanical fatigue of shape memory alloys." Journal of Materials Science 39, no. 2 (January 2004): 385–99. http://dx.doi.org/10.1023/b:jmsc.0000011492.88523.d3.

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24

Klingelhöffer, Hellmuth, Ernst Affeldt, Martin Bache, Marion Bartsch, Tilmann Beck, H. J. Christ, Bernard Fedelich, et al. "Special Issue: Recent developments in thermo-mechanical fatigue." International Journal of Fatigue 99 (June 2017): 215. http://dx.doi.org/10.1016/j.ijfatigue.2017.02.002.

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25

Nesládek, Martin, Josef Jurenka, Michal Bartošák, Milan Růžička, Maxim Lutovinov, Jan Papuga, Radek Procházka, Jan Džugan, and Petr Měšťánek. "THERMO-MECHANICAL FATIGUE ANALYSIS OF A STEAM TURBINE SHAFT." Acta Polytechnica CTU Proceedings 20 (December 31, 2018): 56–64. http://dx.doi.org/10.14311/app.2018.20.0056.

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Increasing demands on the flexibility of steam turbines due to the use of renewable energy sources substantially alters the fatigue strength requirements of components of these devices. Rapid start-ups as well as the increased number of the load cycles applied to the turbines must be handled by design methodologies. The goal of the work presented in this paper was to provide a computational framework applicable to the thermo-mechanical fatigue (TMF) prediction of steam turbine shafts. The so-called Damage Operator Approach by Nagode et al. has been implemented to the software codes and applied to fatigue analysis of the thermo-mechanical material response computed numerically by the finite element analysis. Experimental program conducted in order to identify the material thermo-mechanical behavior and to verify numerical simulations is introduced in the paper. Some results of TMF prediction of a sample steam turbine shaft are shown.

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Ekpu, M. "Thermo-Mechanical Analysis of Aluminium Silicon Carbide Composite Materials." Journal of Applied Sciences and Environmental Management 24, no. 6 (July 17, 2020): 961–66. http://dx.doi.org/10.4314/jasem.v24i6.3.

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In recent years, composite materials have dominated the electronics industries and other manufacturing industries. Hence, composite materials like aluminium silicon carbide (AlSiC), has been employed to produce heat sinks, which are used mainly to manage heat in electronic devices. However, thermal fatigue of such composite material is a major challenge in maintaining reliability of the device. This paper investigates the thermomechanical effect of AlSiC composite materials. Finite element method (FEM) was used in the analyses of the composite materials based on the particulate inclusions between 10 – 50% compositions. The thermal profile (-40oC to 85oC) employed in this study is used commercially for consumer products. The fatigue life of the composite material which is based on the stresses and strains parameters were obtained and evaluated. The results from this investigation suggests that the deformations, strains, and stresses reduced with increase in the percentage of particulate inclusions. Also, the fatigue life of the composite material showed that the reliability of the material is increased with higher inclusions. This investigation demonstrated that 50% particulate inclusions has a better number of cycles to fatigue failure (5.09E+04) when compare to other inclusions. While 10% inclusions has the least fatigue life (4.39E+04) based on this investigation. Keywords: composite material; temperature profile; silicon carbide; thermal fatigue

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27

Zhou, L., S. X. Li, Y. C. Wang, Q. S. Zang, and K. Lu. "Finite element analysis of the thermo-mechanical fatigue of DD8 single crystal nickel-based superalloy." International Journal of Materials Research 94, no. 11 (November 1, 2003): 1222–27. http://dx.doi.org/10.1515/ijmr-2003-0221.

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Abstract A nonlinear finite element method is presented for analysing the thermo-mechanical fatigue behavior of the DD8 single crystal nickel-based superalloy. The specimens had axial orientations along the [001] direction. In-phase and out-of-phase thermo-mechanical fatigue were simulated under mechanical strain control with a temperature variation from 450 to 900 °C. The cyclic mechanical behavior, the equivalent stress and plastic strain were investigated in both γ' phase and γ matrix.

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Ali, M. A. N., R. A. Hussein, and H. A. Hussein. "Numerical Thermo-Mechanical Strength Analysis of an IC Engine Component." International Journal of Applied Mechanics and Engineering 26, no. 3 (August 26, 2021): 1–11. http://dx.doi.org/10.2478/ijame-2021-0031.

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Abstract This research investigates a thermo-mechanical strength of three geometrical shape designs of an internal combustion (IC) engine piston by a finite element analysis (FEA). FEA was performed using Solidworks software for modelling geometrical piston designs, and the models were imported into ANSYS software for thermo-mechanical fatigue simulation. The work focused on predicting high stress intensity and indicated the fatigue critical regions and life of the piston shape design. AL7075-T6 aluminium alloy was used as a piston material and thermo-mechanical fatigue simulation was conducted based on the experimental stress-number of cycles recorded data from literature. Analytical results showed the similarity of the critical failure positions to some real failures in the IC engine piston, and the shape design modification of the piston. Hence, this concept can be used to satisfy the IC engine design needs at low cost.

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Nesládek, Martin, Michal Bartošák, Josef Jurenka, Jan Papuga, Milan Růžička, Petr Měšt’ánek, and Jan Džugan. "Thermo-mechanical fatigue prediction of a steam turbine shaft." MATEC Web of Conferences 165 (2018): 22016. http://dx.doi.org/10.1051/matecconf/201816522016.

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The increasing demands on the flexibility of steam turbines due to the use of renewable energy sources substantially alters the fatigue strength requirements of components of these devices. This paper presents Thermo-Mechanical Fatigue (TMF) design calculations for the steam turbine shaft. The steam turbine shaft is exposed to complex thermo-mechanical loading conditions during the operating cycle of the turbine. An elastic-plastic structural Finite Element Analysis (FEA) of the turbine shaft is performed for the turbine operating cycle on the basis of calculated temperature fields obtained in a previous transient thermal FEA. The temperature dependent material parameters, which are used in the elastic-plastic FEA, are obtained from the uniaxial tests. Consequently, the TMF is predicted for the steam turbine shaft. Several fatigue criteria are used for the identifications of the critical domain and for the TMF damage assessment of the turbine shaft.

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Okazaki, Masakazu, Akira Ikada, Yasuhiro Yamazaki, and Akihiro Mikami. "OS09W0272 Damage evolution during thermo-mechanical fatigue in a unidirectionally reinforced SP700/SCS-6 composite." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2003.2 (2003): _OS09W0272. http://dx.doi.org/10.1299/jsmeatem.2003.2._os09w0272.

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Lee, Yoon Seok, Mitsuo Niinomi, Masaaki Nakai, Junko Hieda, Takashi Maeda, Yoshihisa Shirai, and Ikuhiro Inagaki. "OS12-1-2 Effects of thermo-mechanical treatments on fatigue properties of Ti-6Al-4V." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2011.10 (2011): _OS12–1–2—. http://dx.doi.org/10.1299/jsmeatem.2011.10._os12-1-2-.

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Marchionni, M., Hellmuth Klingelhöffer, Hans Joachim Kühn, T. Ranucci, and Kathrin Matzak. "Thermo-Mechanical Fatigue of the Nickel–Base Superalloy Nimonic 90." Key Engineering Materials 345-346 (August 2007): 347–50. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.347.

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The thermo-mechanical fatigue (TMF) behaviour of the Nimonic 90 Nickel base superalloy has been investigated within two laboratories. In-phase-tests (IP) where the maximum mechanical strain occurs at the maximum temperature (850°C), and 180°-out-of-phase-tests (180° OP) where the maximum mechanical strain coincides with the minimum temperature (400°C) have been applied. All tests were carried out at varying mechanical strain ranges with a constant strain ratio of Rε = - 1. A temperature rate of 5 K/s was used throughout the whole cycle without any additional cooling system during decreasing temperature. The fatigue life of 180° OP tests is longer compared to identical IP tests. The stress / mechanical strain hysteresis loops are completely different and some characteristic values are compared to each other. The fracture surfaces observed show that fatigue crack (or cracks) starts on the external surface and propagates inwards. The fractures of 180° OP tests are transgranular showing the presence of fatigue striations, while the fractures of IP tests are mixed transgranular and intergranular with no fatigue striations.

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Lekakh, S. N., M. Buchely, R. O'Malley, L. Godlewski, and Mei Li. "Thermo-cycling fatigue of SiMo ductile iron using a modified thermo-mechanical test." International Journal of Fatigue 148 (July 2021): 106218. http://dx.doi.org/10.1016/j.ijfatigue.2021.106218.

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Roth, M., and Horst Biermann. "Thermo-Mechanical Fatigue Behaviour of the Gamma-Titanium Aluminide TNB-V5 with Near-Gamma Microstructure." Materials Science Forum 539-543 (March 2007): 1559–64. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1559.

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The efficiency of aircraft and industrial gas turbines and combustion engines depends on the maximum operation temperature and, therefore, on the properties of the commercial high temperature materials. In the temperature range 500°C to 750°C γ-titanium aluminides especially alloys of the third generation represent an attractive alternative to the established nickel-base superalloys which have the double density. Due to superimposed cyclic thermal and cyclic mechanical loadings during start-up and shut-down operations structural components in gas turbines and combustion engines may not only be exposed to isothermal but also to thermo-mechanical fatigue (TMF). In this study the cyclic deformation and fatigue behaviour under thermo-mechanical load of the γ-TiAl alloy TNB-V5 with near-gamma microstructure is evaluated. To set a fatigue-life relation strain-controlled thermo-mechanical fatigue tests were carried out with two different strain ranges, different temperature-strain cycles and different temperature ranges from 400°C to 800°C. Additional low-cycle fatigue (LCF) tests were performed at 400°C, 600°C and 800°C for comparison. Cyclic deformation curves, stress-strain hysteresis loops and fatigue lives of the tests are presented. The shortest fatigue lives are always observed in out-of phase (OP) tests, the longest in in-phase (IP) tests. Clockwise-diamond (CD) and counter-clockwise diamond (CCD) testing yield similar fatigue lives intermediate between those of OP and IP tests. For a general life prediction the double-logarithmic plot of the damage parameter by Smith, Watson and Topper vs. fatigue life is well suitable.

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Biglari, Farid R., Catrin Mair Davies, and Kamran M. Nikbin. "Development of Simulations Models under Thermo Mechanical Loading Conditions." Key Engineering Materials 417-418 (October 2009): 69–72. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.69.

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Advanced steels are designed and produced to be used in engineering applications in which thermo-mechanical fatigue could be a main factor in causing failure in components operating at elevated temperatures. In this paper thermo-mechanical fatigue properties of these steels are studied under the influence of creep and fatigue damage evolution. Development of different models and simulation techniques are reviewed to predict material behaviour. Numerical simulations are carried out to predict experimental tests on parent material notched bar specimens. Numerical predictions are introduced in advance of experimental test to assess the experimental test procedure. This is usually done to enhance the experimental result integrity and expectations. A local ductile damage development methodology is employed using the kinematic hardening criterion and compared to previously used strain hardening material property. The modelling on notched bar geometries is extended to geometries with cracks in which a local damage criterion will be used to predict virtual crack extension in compact tension specimens.

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Bache, Davies, Davey, Thomas, and Berment-Parr. "Microstructural Control of Fatigue Behaviour in a Novel  Titanium Alloy." Metals 9, no. 11 (November 7, 2019): 1200. http://dx.doi.org/10.3390/met9111200.

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The novel titanium alloy TIMETAL® 407 (Ti-407) has been developed as an alternative to Ti-6Al-4V (Ti-6-4), for applications that demand relatively high ductility and energy absorption. Demonstrating a combination of lower strength and greater ductility, the alloy introduces a variety of cost reduction opportunities, including improved machinability. Thermo-mechanical processing and its effects on microstructure and subsequent mechanical performance are characterised, including a detailed assessment of the fatigue and crack propagation properties. Demonstrating relatively strong behaviour under high-cycle fatigue loading, Ti-407 is nevertheless susceptible to time-dependent fatigue effects. Its sensitivity to dwell loading is quantified, and the associated deformation and fracture mechanisms responsible for controlling fatigue life are explored. The intimate relationship between thermo-mechanical processing, micro-texture and fatigue crack initiation through the generation of quasi-cleavage facets is highlighted. Consistent fatigue crack growth kinetics are demonstrated, independent of local microstructure.

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Liu, Chang, and Wei Zheng Zhang. "Lifetime Prediction of Thermo-Mechanical Fatigue for Exhaust Manifold." Advanced Materials Research 433-440 (January 2012): 9–17. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.9.

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In this research, the non-linear thermo-mechanical simulation, experimental study and lifetime prediction of engine exhaust manifold were systematically analyzed. Fluid-structure coupled method was employed in the simulation. Heat transfer analysis simultaneous considered radiation, convection and conduction. Inelastic properties of the materials used for the thermo-mechanical analysis included kinematic hardening and creep. Some models were introduced and used to predict lifetime of the manifold. Temperature data obtained during the engine bench tests can be accurately matched with the analysis results. The results indicated that the highest temperature located on the confluence of exhaust manifold and the plastic dissipated energy field caused by the cyclic thermal loading can be matched with the crack zone of exhaust manifold.

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Rong, Li Jian, David A. Miller, and Dimitris C. Lagoudas. "Thermo-Mechanical Fatigue and Transformation Behavior of TiNiCu SMA." Materials Science Forum 394-395 (May 2002): 329–32. http://dx.doi.org/10.4028/www.scientific.net/msf.394-395.329.

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Radosavljevic, Marko, Stuart R. Holdsworth, Patrick Grossmann, Luca Ripamonti, and Edoardo Mazza. "Service-cycle component-feature specimen thermo-mechanical fatigue testing." Materials at High Temperatures 30, no. 1 (March 2013): 13–18. http://dx.doi.org/10.3184/096034013x13625747940006.

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Affeldt, Ernst E., and Lorena Cerdan de la Cruz. "Thermo-mechanical fatigue of a wrought nickel based alloy." Materials at High Temperatures 30, no. 1 (March 2013): 69–76. http://dx.doi.org/10.3184/096034013x13638694650058.

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NAGODE, M., and M. FAJDIGA. "Temperature-stress-strain trajectory modelling during thermo-mechanical fatigue." Fatigue Fracture of Engineering Materials and Structures 29, no. 3 (March 2006): 183–89. http://dx.doi.org/10.1111/j.1460-2695.2005.00978.x.

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dell'Erba, D. "Three-dimensional thermo-mechanical fatigue crack growth using BEM." International Journal of Fatigue 22, no. 4 (April 2000): 261–73. http://dx.doi.org/10.1016/s0142-1123(00)00011-6.

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MORI, Yuzuru, Satoshi YAMAGISHI, and Masakazu OKAZAKI. "609 Thermo-mechanical Fatigue on Thermal Barrier Coated Specimen." Proceedings of Conference of Hokuriku-Shinetsu Branch 2014.51 (2014): _609–1_—_609–2_. http://dx.doi.org/10.1299/jsmehs.2014.51._609-1_.

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Palmer, J., J. Jones, A. Dyer, R. Smith, R. Lancaster, and M. Whittaker. "Development of test facilities for thermo-mechanical fatigue testing." International Journal of Fatigue 121 (April 2019): 208–18. http://dx.doi.org/10.1016/j.ijfatigue.2018.12.015.

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PAHLAVANYALI, S., A. RAYMENT, B. ROEBUCK, G. DREW, and C. RAE. "Thermo-mechanical fatigue testing of superalloys using miniature specimens." International Journal of Fatigue 30, no. 2 (February 2008): 397–403. http://dx.doi.org/10.1016/j.ijfatigue.2007.01.051.

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Jacobsson, Lars, Christer Persson, and Solveig Melin. "Thermo-mechanical fatigue crack propagation experiments in Inconel 718." International Journal of Fatigue 31, no. 8-9 (August 2009): 1318–26. http://dx.doi.org/10.1016/j.ijfatigue.2009.02.041.

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Kolmorgen, Roman, and Horst Biermann. "Thermo-mechanical fatigue behaviour of a duplex stainless steel." International Journal of Fatigue 37 (April 2012): 86–91. http://dx.doi.org/10.1016/j.ijfatigue.2011.10.005.

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Ahmed, Raasheduddin, Paul Ryan Barrett, Mamballykalathil Menon, and Tasnim Hassan. "Thermo-mechanical low-cycle fatigue-creep of Haynes 230." International Journal of Solids and Structures 126-127 (November 2017): 90–104. http://dx.doi.org/10.1016/j.ijsolstr.2017.07.033.

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Okazaki, Masakazu, M. Muzvidziwa, R. Iwasaki, and Naoto Kasahara. "Fatigue Crack Thresholds Significantly Affected by Thermo-Mechanical Loading Histories in an Austenitic and a Ferritic Low Alloy Steel." Advanced Materials Research 891-892 (March 2014): 1295–301. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.1295.

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Abstract:

High cycle thermal fatigue failure of pipes induced by fluid temperature change is one of interdisciplinary issues to be concerned for long term structural reliability of high temperature structural material and components in energy systems. In order to get basic understanding on this article. the fatigue crack propagation tests were carried out in a low alloy steel and an austenitic stainless steel those were subjected to typical kinds of thermo-mechanical loading histories those included a simulated weld repair process. It was shown experimentally that the thermo-mechanical histories left their individual effects along the prior fatigue crack wake, resulting in significant change in the fatigue crack threshold. Some proposes are presented to predict those history effects.

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Mistreanu, S., F. Tudose-Sandu-Ville, V. Manole, and I. Ştirbu. "Equipment for thermo-mechanical contact fatigue in rolling conditions determination." IOP Conference Series: Materials Science and Engineering 1262, no. 1 (October 1, 2022): 012026. http://dx.doi.org/10.1088/1757-899x/1262/1/012026.

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The paper refers to the influence of corrosion on the installation and development of thermos - mechanical contact fatigue on metallic elements. The analysis takes into account the influence of the thermal Jacq effect on the position of the origin of a crack following the thermos - mechanical contact fatigue. Here are presents some aspects concerning mechanical contact fatigue and corrosion wear and the links of these two kinds of wear in the common deterioration of the contact layer. Schematic draw of the test stand is presented with the main component elements and thermal anomaly effect Jacq in heat conduction was analyzed. To validate the theoretical aspects presented, a test rig is introduced and an experimental program of testing is developed.

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Journal articles on the topic 'Thermo-Mechanical Fatigue'

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