PSI - Issue 2_B

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 2 (2016) 403–408 Available online at www.sciencedirect.com ScienceD rect Structural Integrity Procedia 00 (2016) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000–000

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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. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Influence f high intensity ion beam irradiation on impact toughness of 12Cr1MoV steel S.V. Panin a,c * P.O. Maruschak b , I.V. Vlasov a,c , V.P. Sergeev a,c , F. Berto d,e a Institute of Strength Physics and Materials Science RAS, Tomsk, Russia b Ternopil Ivan Pul’uj National Technical University, Ternopil, Ukraine c National Research Tomsk Polytechnic University, Tomsk, Russia d Department of Ma agemen and Engineering, University of Padova, Vicenza, 36100, Italy e Norwegian University of Science and Technology - NTNU, Department of Engineering Design and Materials, Trondheim, 7491, Norway Abstract The impact toughness of non-treated and irradiated 12Cr1MoV steel Charpy specimens has been studied in the range of temperatures from 20 C to 600 C. It was revealed that the ion beam treatment of steel deteriorates the impact toughness by 5– 40 % at the tested temperature range. The physical regularities of irradiation effect on microhardness and hardness of the treated surface were investigated. It was also found out that irradiated specimens fracture via more brittle mechanism, which is related to both more severe stress– train state at the notch tip and gradient alteration of properties in the subsur ac layer. © 2016 The Authors. Published by Elsevier B.V. Peer-revi w under responsibility of th Scientific Committee of ECF21. Keywords: physical mesomechanics, impact toughness, fracture, ion beam treatment, 12Cr1MoV steel 1. Introduction The tightened requirements for the reliability of thermal power stations arouse the necessity of accounting for the impact of operating conditions on material degradation, which in its turn is accompanied by the stiffening of the requirements for strength and cracking resistance of heatproof steels [Nykyforchyn et al. (2010), Balyts’kyi et al. (2009)]. To the present moment, superheater drums and steam lines manufactured from 12Cr1MoV steel and used at 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Influence of high intensity ion beam irradiation on impact toughness of 12Cr1MoV steel S.V. Panin a,c * P.O. Maruschak b , I.V. Vlasov a,c , V.P. Sergeev a,c , F. Berto d,e a Institute of Strength Physics and Materials Science RAS, Tomsk, Russia b Ternopil Ivan Pul’uj National Technical University, Ternopil, Ukraine c National Research Tomsk Polytechnic University, Tomsk, Russia d Department of Management and Engineering, University of Padova, Vicenza, 36100, Italy e Norwegian University of Science and T chnology - NTNU, Department of Engineering Design and Materials, Trondheim, 7491, Norway Abstract The impact toughness of non-treated and irradiated 12Cr1MoV steel Charpy specimens has been studied in the range of temperatures from 20 C to 600 C. It w s reve led that the ion beam treatment of st el d teriorates the impact toug ness by 5– 40 % at the tested temperature range. The physical regularit es of irradiation effect on microhardn s and hardness of the treated surface were inves igated. It was also found out that irradiated specimens fractur via more brittle mechanism, which is r lat d to both more s vere tress–strain state at the notch tip and gr dient alteration of properties in the subsurface layer. © 2016 The Aut ors. Published by Elsevier B.V. Peer-review under esponsibility of the Scientific Committee of ECF21. Keywords: physical mesomechanics, impact toughness, fracture, ion beam t eatm nt, 12Cr1MoV steel 1. Introduction The tightened requirements for the reliability of thermal power stations arouse the necessity of accounting for the impact of operating conditions on materi l degradation, which in its turn is accompani d b the stiffeni f requirements for strength and cracking esistance of heatproof steel [Nykyfor hyn et al. (2010), Balyts’kyi et al. (2009)]. To the present moment, superheat r drums and st am lines manufactured from 12Cr1MoV steel and used at Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the Scientific Committee of ECF21. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +7 (3822) 28-69-04; fax: +7 (3822) 49-25-76. E-mail address: svp@ispms.tsc.ru * Corresponding author. Tel.: +7 (3822) 28-69-04; fax: +7 (3822) 49-25-76. E-mail address: svp@ispms.tsc.ru

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ). Peer review under responsibility of the Scientific Committee of ECF21. 10.1016/j.prostr.2016.06.052