PSI - Issue 14

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com Scie ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 14 9 34–43 Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 ScienceDirect

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2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 10.1016/j.prostr.2019.05.006 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2452-3216 © 2018 Th Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. * Corresponding author. Tel.: +7-919-379-2016; fax: +7-343-375-9569. E mail address: yukorob v@gma l.com XV Portuguese Conference on Fracture, PCF 2016, 10-12 February 2016, Paço de Arcos, Portugal Thermo-mechanical modeling of a high pressure turbine blade of an airplane gas turbine engine P. Brandão a , V. Infante b , A.M. Deus c * a Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal b IDMEC, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal c CeFEMA, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal Abstract During their operation, modern aircraft engine components are subjected to increasingly demanding operating conditions, especially the high pressure turbine (HPT) blades. Such conditions cause these parts to undergo different types of time-dependent degradation, one of which is creep. A model using the finite element method (FEM) was developed, in order to be able to predict the creep behaviour of HPT blades. Flight data records (FDR) for a specific aircraft, provided by a commercial aviation company, were used to obtain thermal and mechanical data for three different flight cycles. In order to create the 3D model needed for the FEM analysis, a HPT blade scrap was scanned, and its chemical composition and material properties were obtained. The data that was gathered was fed into the FEM model and different simulations were run, first with a simplified 3D rectangular block shape, in order to better establish the model, and then with the real 3D mesh obtained from the blade scrap. The overall expected behaviour in terms of displacement was observed, in particular at the trailing edge of the blade. Therefore such a model can be useful in the goal of predicting turbine blade life, given a set of FDR data. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2nd International Conference on Structural Integrity and Exhibition 2018 Characteristics of strain-induced martensitic transformation in welded joints with the structure of metastable austenite Korobov Iu., Pimenova O., Filippov M., Khadyev M., Ozerets N., Mikhailov S., Morozov S., Davydov Iu., Razikov N. * Ural Federal University, 19 Mira str., Ekaterinburg, 620002, Russia Abstract Welded joints of medium-carbon steel were performed by arc w lding in shielding gases using cored wire of 50Cr18 type. Phase transitions in the process of crystallization and subsequent thermal and deformation effects under loading were studied. For this purpose, the weldability, wear resistant tests and structure study results were analyzed. It was found that the structure contains an increased amount of metastable austenite, δ -ferrite and high strength carbonaceous-chromiс martensite. Welded joints have a high capacity for intensive hardening during local deformation due to the TRIP effect. At the same time, they are highly resistant against the formation of cold cracks, which is the main defect in the welds of medium-carbon steels. It was shown that these features are reasoned from the heterophase dissipative structure of the weld metal formed under the conditions of a typical thermal-deformation cycle of the welded joint. © 2018 The Authors. Published by Elsevier B.V. This is an open acce s article un the CC BY-NC-ND licens (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-r view nder responsib lity of P er-review und r respons bility of the SICE 2018 organizers. 2nd International Conference on Structural Integrity and Exhibition 2018 Characteristics of strain-induced martensitic transformation in welded joints with the structure of metastable austenite Korobov Iu., Pimenova O., Filippov M., Khadyev M., Ozerets N., Mikhailov S., Morozov S., Davydov Iu., Razikov N. * Ural Federal University, 19 Mira str., Ekaterinburg, 620002, Russia Abstract Welded joint of medium-carbon ste l w re performed by arc welding in shielding gas s sing cored i of 50Cr18 type. Phase transitions in the pro ess of crystalliz tion nd subsequ nt therm l and d formation effects under loading were studied. For this purpose, the weldability, wear resistant tests and structure study res lts were analyzed. It was found that the structure contains an increased amount of metastable austenite, δ -ferrite and high strength carbonaceous-chromiс martensite. Welded joints have a high capacity for intensive hardening during l cal deformation due to the TRIP effect. At t e same time, they are highly r sistant against the formation of cold cracks, which is the main efect in the welds of medium-carbon steels. It was shown that these features are reasoned from the heterophase dissipative structure of the weld metal formed under the conditions of a typical thermal-deformation cycl of the welded joi t. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) S lection and peer-review und r res onsibility of Peer-review under responsibility of the SICE 2018 organizers. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: Type your keywords here, separated by semicolons ; Keywo ds: Type your keyword here, separat d by sem olons ; Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt * Corresponding author. Tel.: +7-919-379-2016; fax: +7-343-375-9569. E-mail address: yukorobov@gmail.com