Journal of Design Against Fatigue最新文献

{"title":"Initiation and growth of fatigue cracks in sheets with U-shaped notches in the first and mixed modes of fracture","authors":"R. Seifi, Hamid Shahbazi","doi":"10.62676/jdaf.2024.2.1.10","DOIUrl":"https://doi.org/10.62676/jdaf.2024.2.1.10","url":null,"abstract":"This study presents the effects of the geometry of the notches on the fatigue life, crack initiation, and growth in mixed mode and first mode of the fracture. For this purpose, some samples were tested with U-shaped notches with different radii and depths and various orientations with respect to the loading directions under fatigue loads. Using the fatigue crack growth rates, the Paris law coefficients were obtained for the used material in different conditions. It was shown that these coefficients are independent of the geometry of the samples. Fatigue crack growth behaviors in the mixed mode tests were also in good agreement with the result of the numerical simulations. Predictions of the maximum tangential stress criterion and numerical simulation for the position of the crack initiation on the notch root were compared with the tested observations, which showed good agreement. The fatigue life of the test samples was compared with the analytical results provided by the Manson-Coffin law. It was shown that a 25% decrease in notch depth increases the fatigue life by 3 times, also, an increase of 0.5 mm in the notch radius increases the fatigue life by 40%. Finally, the fracture surface of the samples was checked using an optical microscope. This study showed that the fracture surfaces have one or two lateral shear lips and plane stress conditions were established.\u0000 \u0000REFERENCES\u0000[1] X.-L. Zheng, Modelling fatigue crack initiation life, Int. J. Fatigue, 15 (1993) 461-466, https://doi.org/10.1016/0142-1123(93)90257-Q.\u0000[2] M. De Freitas, L. Reis, B. Li, Evaluation of small crack growth models for notched specimen under axial/torsional fatigue loading, Facta universitatis-series: Mechanics, Automatic Control and Robotics, 3 (2003) 657-669,\u0000[3] H. Zhang, A. Fatemi, Short fatigue crack growth from a blunt notch in plate specimens, Int. J. Fract., 170 (2011) 1-11, https://doi.org/10.1007/s10704-011-9597-7.\u0000[4] Z. Zhang, Q. Sun, C. Li, Y. Qiao, D. Zhang, A New Three-Parameter Model for Predicting Fatigue Crack Initiation Life, J. Mater. Eng. Perform., 20 (2011) 169-176, https://doi.org/10.1007/s11665-010-9667-4.\u0000[5] A. Carpinteri, M. Paggi, The effect of crack size and specimen size on the relation between the Paris and Wöhler curves, Meccanica, 49 (2014) 765-773, https://doi.org/10.1007/s11012-014-9908-y.\u0000[6] R. Branco, J. Costa, F. Antunes, Fatigue behaviour and life prediction of lateral notched round bars under bending–torsion loading, Eng. Fract. Mech., 119 (2014) 66-84, https://doi.org/10.1016/j.engfracmech.2014.02.009.\u0000[7] F. Gomez, G. Guinea, M. Elices, Failure criteria for linear elastic materials with U-notches, Int. J. Fract., 141 (2006) 99-113, https://doi.org/10.1007/s10704-006-0066-7.\u0000[8] M. Benedetti, M. Beghini, L. Bertini, V. Fontanari, Experimental investigation on the propagation of fatigue cracks emanating from sharp notches, Meccanica, 43 (2008) 201-210, https://doi.org/10.1007/s11012-008-9129-3.\u0000[9] A. Akhavan Safar, A. Vrdi, M. Zoro","PeriodicalId":517750,"journal":{"name":"Journal of Design Against Fatigue","volume":"7 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140283878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low cycle fatigue behavior and life prediction of a directionally solidified alloy","authors":"Behnam Salehnasab, Sarvnaz Hashem-Sharifi","doi":"10.62676/ygye8n63","DOIUrl":"https://doi.org/10.62676/ygye8n63","url":null,"abstract":"Alloys used in engines are subjected to challenging environments characterized by thermal and mechanical cyclic loadings during start-up and shut-down processes. These conditions can significantly increase the occurrence of fatigue failure mechanisms. Therefore, this study focuses on investigating the low cycle fatigue (LCF) behavior of directionally-solidified alloy at two distinct temperatures, namely 600 °C and 800 °C. Strain-controlled LCF tests were conducted at the specified temperatures, utilizing constant total strain amplitudes of 0.4%, 0.6%, 0.8%, and 1% under a totally reversed loading ratio (R = -1). The Coffin-Manson model, based on plastic deformation, along with a hysteresis energy-based criterion model, were employed to predict and evaluate fatigue life and LCF behavior. Notably, the hysteresis energy and Coffin-Manson models exhibited superior capability in predicting LCF life at 800 °C compared to 600 °C.\u0000 \u0000REFERENCES\u0000\u0000Salehnasab, J. Marzbanrad, E. Poursaeidi, Transient thermal fatigue crack propagation prediction in a gas turbine component, Eng. Fail. Anal. 130 (2021) 105781. https://doi.org/10.1016/j.engfailanal.2021.105781.\u0000S.K. Balam, M. Tamilselvi, A.K. Mondal, R. Rajendran, An investigation into the cracking of platinum aluminide coated directionally solidified CM247 LC high pressure nozzle guide vanes of an aero engine, Eng. Fail. Anal. 94 (2018) 24–32. https://doi.org/10.1016/j.engfailanal.2018.07.027.\u0000M. Martinez-Esnaola, M. Arana, J. Bressers, J. Timm, A. Martin-Meizoso, A. Bennett, E.E. Affeldt, Crack initiation in an aluminide coated single crystal during thermomechanical fatigue, ASTM Spec. Tech. Publ. 1263 (1996) 68–81. https://doi.org/10.1520/STP16447S.\u0000Schlesinger, T. Seifert, J. Preussner, Experimental investigation of the time and temperature dependent growth of fatigue cracks in Inconel 718 and mechanism based lifetime prediction, Int. J. Fatigue. 99 (2017) 242–249. https://doi.org/10.1016/j.ijfatigue.2016.12.015.\u0000Furrer, H. Fecht, Ni-based superalloys for turbine discs, Jom. 51 (1999) 14–17. https://doi.org/10.1007/s11837-999-0005-y.\u0000Salehnasab, D. Zarifpour, J. Marzbanrad, G. Samimi, An Investigation into the fracture behavior of the IN625 hot-rolled superalloy, J. Mater. Eng. Perform. 30 (2021) 7171–7184. https://doi.org/https://doi.org/10.1007/s11665-021-05895-x.\u0000Caron, T. Khan, Evolution of Ni-based superalloys for single crystal gas turbine blade applications, Aerosp. Sci. Technol. 3 (1999) 513–523. https://doi.org/10.1016/S1270-9638(99)00108-X.\u0000Slámečka, J. Pokluda, M. Kianicová, J. Horníková, K. Obrtlík, Fatigue life of cast Inconel 713LC with/without protective diffusion coating under bending, torsion and their combination, Eng. Fract. Mech. 110 (2013) 459–467. https://doi.org/10.1016/j.engfracmech.2013.01.001.\u0000Rajendran, M.D. Ganeshachar, T.M. Rao, Condition assessment of gas turbine blades and coatings, Eng. Fail. Anal. 18 (2011) 2104–2110. https://doi.org/10.1016/j.engfailanal.2011.06.017.\u0000K. Bhaum","PeriodicalId":517750,"journal":{"name":"Journal of Design Against Fatigue","volume":" 85","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140392358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental research on mechanical, material, and metallurgical properties of Inconel 600: Application in elevated temperature environment","authors":"Arash Moradi, Siamak Ghorbani, Mahmoud Chizari","doi":"10.62676/jdaf.2024.2.1.30","DOIUrl":"https://doi.org/10.62676/jdaf.2024.2.1.30","url":null,"abstract":"Du to high strength and toughness, high oxidation resistance, and high ductility, the Inconel 600 alloy is an ideal choice for the components used in combined heat and power turbines. Therefore, in this paper, the authors conducted experimental tests to better underestand the mechanical behavior of superalloys Inconel 600. The experiments included tensile, fatigue, and creep tests. The material deformation and stress-strain behavior were measured. In addition the yield strength, ultimate tensile strength, elongation, and modulus of elasticity were captured. By illustrating the engineering and true stress-strain curves the Ramberg-Osgood relation were extracted. As a result of fatigue test, the relationship between strain amplitude and the number of cycles to failure for specimens were obtained. The creep tests were conducted at a constant temperature of 650℃. The strain-time data were collected, and the resulting creep strain-time curve were plotted for smooth samples under their respective stress conditions.\u0000 \u0000REFERENCES\u0000\u0000G. Becerra, M.R.B. Alvarez, V.H.L Morelos, A. Ruiz. Creep behavior and microstructural characterization of Inconel-625/Inconel-600 welded joint. MRS Adv. 8, (2023) 1217–1223, https://doi.org/10.1557/s43580-023-00662-7.\u0000Baig, S.H.I. Jaffery, M.A. Khan, M. Alruqi, Statistical analysis of surface roughness, burr formation and tool wear in high speed micro milling of Inconel 600 alloy under cryogenic, wet and dry conditions. Micromachines 14(1) 2023, 13. https://doi.org/10.3390/mi14010013.\u0000Nanaware, S. Pawar, M. Ramachandran. Mechanical characterization of nickel alloys on turbine blades. REST J.E.M.M., 1(1) (2015), 15–19.\u0000D. Kwon, D.K. Park, S.W. Woo, D.H. Yoon, I. Chung. A study on fretting fatigue life for the Inconel alloy 600 at high temperature. Nucl. Eng. Des. 240 (2010) 2521–2527. https://doi.org/10.1016/j.nucengdes.2010.05.013.\u0000Gajalappa, A. Krishnaiah, K.B. Kumar, Eswaranna, K.K. Saxena, P. Goyal. Flow behaviour kinetics of Inconel 600 superalloy under hot deformation using gleeble 3800. Mater. Today: Proc. 45 (2021) 5320–5322. https://doi.org/10.1016/j.matpr.2021.01.909.\u0000Y. Wu, P.H. Sun, F.J. Zhu, S.C. Wang, W.R. Wang, C.C. Wang, C.H. Chiu. Tensile flow behavior in Inconel 600 alloy sheet at elevated temperatures. Procedia Eng. 36 (2012) 114–120. https://doi.org/10.1016/j.proeng.2012.03.018.\u0000Xu, S. Wang, X. Tang, Y. Li, J. Yang, J. Li, Y. Zhang. Corrosion mechanism of Inconel 600 in oxidizing supercritical aqueous systems containing multiple salts. Eng. Chem. Res. 58(51) (2019) 23046–23056. https://doi.org/10.1021/acs.iecr.9b04527.\u0000S. Al-Rubaie, L.B. Godefroid, J.A.M. Lopes. Statistical modeling of fatigue crack growth rate in Inconel alloy 600. Int. J. Fatigue 29 (2007) 931–940. https://doi.org/10.1016/j.ijfatigue.2006.07.013.\u0000Y. Wu, F.J. Zhu, S.C. Wang, W.R. Wang, C.C. Wang, C.H. Chiu. Hot deformation characteristics and strain-dependent constitutive analysis of Inconel 600 superalloy. J. Mater. Sci. 47 (2012) 3971–398","PeriodicalId":517750,"journal":{"name":"Journal of Design Against Fatigue","volume":" 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140392726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}