PSI - Issue 2_B

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 1383–139 Available online at www.sciencedirect.com ScienceDirect 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 Initial Degradation Process of Heat-resistant Materials Based on the Change of Crystallinity of Grains and Grain Boundaries Takuya Murakoshi a , Taichi Shinozaki a , Ken Suzuki b and Hideo Miura b * a Department of Finemechanics, Graduate School of Engineering, Tohoku Univesity, 6-6-11-716 Aobayama, Aoba-ku, Sendai 9808579, Japan b Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University, 6-6-11-712 Aobayama, Aoba-ku, Sendai 9898579, Japan Abstract Initial strengthened micro textures of heat-resistant materials have been found to disappear under operating conditions due to the increase of operating temperature and mechanical loading for improving the thermal efficiency of various power and chemical plantsClick here and insert your abstract text. T e change of the micro textures was observed from the viewpoint of the change of he order of atom arrangement by using electro back-scatter diffraction analysis. The change of the order of atom arrangement was investigated by an lyzing the change of the harpness f the measured diffraction pattern obtained from the area irradiated by a foc electron beam. The egradation process of th quality of grains and grain boundaries was measured quantitatively in plural materials and the strain-induced anisotropic diffusion of component elements was the dominant factor of the degradation process. Keywords: High temperature damage; Heat-resistant materials; Strain-induced diffusion; EBSD analysis; Order of atom arrangement 1. Introduction It is imperative to reduce greenhouse-effect gas such as CO 2 . Since the combustion of fossil fuels to generate electricity is the largest single source of CO 2 emissions, accounting for about 42% of the global CO 2 emissions in 2013, high efficiency of thermal power plants is essential for reducing CO 2 emissions. In order to further improve the thermal efficiency of thermal power plants and reduce CO 2 emissions, various R&D projects have been conducted (such as Thermie 700 in the EU and DOE-Vision 21 in the US) to develop A-USC (advanced ultra- 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Initial Degradation Proc ss of Heat-resistant Materials Based on the Change of Crystallinity of Grains and Grain Boundaries Takuya Murakoshi a , Taichi Shinozaki a , Ken Suzuki b and Hideo Miura b * a Department of Finemechanics, Graduate School of Engineeri g, Tohoku Univesity, 6-6-11-716 Aobayama, Aoba-ku, Sendai 9808579, Japan b Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University, 6-6-11-712 Aobayama, Aoba-ku, Sendai 9898579, Japan Abstract Initial strengthened micro textures of heat-resistant materials have been found to disappear under operating conditions due to the increase of operating temperature and mechanical loading for improving the thermal efficiency of various power and chemical plantsClick here and insert your abstract text. The change of the micro textures was observed from the viewpoint of the cha ge of he ord r of atom arrangement by u ng electron back-scatt r diffracti n an lysis. The change of the order of atom arrangement was investigated by analyzing the change of the sharpness of the measured diffraction pattern obtained from the rea irradiated by a focused lectro eam. The degrada ion process of the quality of grains and grain boundaries was measure qu titatively in plural materi ls and th strain-induced anisotropic diffusion of compo ent elements was the dominant factor of the d grada ion proc s. Keywords: High emperature dam ge; Hea -resist nt materi ls; Strain-induce diffusion; EBSD analysis; Order of atom arr ngeme t 1. Introduction It is imperative to reduce greenhouse-effect gas such as CO 2 . Since the combustion of fossil fuels to generate electricity is the largest single source of CO 2 emissions, accounting for about 42% of the global CO 2 emissions in 2013, high efficiency of thermal power plants is essential for reducing CO 2 emissions. In order to further improve the ther al efficiency of thermal power plants and reduce CO 2 emissions, various R&D projects have been conducted (such as Thermie 700 in the EU and DOE-Vision 21 in the US) to develop A-USC (advanced ultra- 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.: +81-22-795-6986; fax: +81-22-795-4311. E-mail address: hmiura@rift.mech.tohoku.ac.jp

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt * Corresponding author. Tel.: +81-22-795-6986; fax: +81-22-795-4311. E-mail address: hmiura@rift.mech.tohoku.ac.jp 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of t e Scientific Committee of ECF21.

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.2016.06.176 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21.