PSI - Issue 2_A

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) 1465–1472 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 il l li t . i i t. tr t r l I t rit r i ( )

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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 Effect of nonmetallic and intermetallic inclusions on crater formation on the surface of TiNi alloys under the electron-beam imp ct L.L. Meisner 1,4,* , V.P. Rotshtein 1,3 , A.B. Markov 2 , S.N. Meisner 1,4 , E.V. Yakovlev 2 , F. D’yachenko 1,4 1 Institute of Strength Physics and Materials Science SB RAS, Tomsk, 634055 Russia 2 Institute of High Current Electronics SB RAS, Tomsk, 634055 Russia 3 Tomsk State Pedagogical University, Tomsk, 634050 Russia 4 National Research Tomsk State University, Tomsk, 634050 Russia The regularities of surface cratering in commercial and precision TiNi alloys irradiated with a low-energy, high-current electron beam (LEHCEB) in dependenc on non-m tallic (TiC(O)) or int rmetallic (Ti2Ni) inclusions presented in TiNi matrix are studied. The melting threshold of TiNi alloy was found to be achieved in the range of LEHCEBs energy density E s corresponding to 1.3-1.5 J/cm 2 . The dominant role of non-metallic inclusions [mainly, TiC(O)] in the nucleation of microcraters was found. The processes initiated by pulsed heating/melting near the inclusion/matrix interface were analyzed. It is proposed that the most important factor enabling the liquid-phase dissolution of inclusions and delivery of impurities of C and O [from TiC(O)] and O (from Ti 4 Ni 2 O x ) into TiNi melt are eutectic reactions taking place in the Ti-Ni-C and Ti-Ni-O systems near Ti 50 Ni 50 composition. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. , , , , n , I tit t f t t i nd Materials Science SB RAS, Tomsk, 634055 Russia 2 Institute of High C t l t i , , i t t i l i it , , i ti l t t i it , , i l iti t i i i l i i i i ll i i t it l , i t l t i t lli i i t t lli i i i l i t i i i t i t i . lti t l i i ll t i i t it s i t . . / . i t l t lli i l i i l , i i t l ti i t . i iti t l ti / lti t i l i / t i i t l . t i t t t t i t t t li t li i i l ti i l i li i iti i i i into TiNi melt are eutectic reactions taking place in the Ti-Ni-C and Ti-Ni-O systems near Ti Ni composition. © 2016 The t . li l i . . Peer-review under responsibility of the Scientific Committee of . Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativ ommons.org/licenses/by-nc-nd/4.0/). Peer-review und r responsibility of the Scientific Committe of ECF21. Abstract

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: TiNi SMAs, Nonmetallic inclusions, Pulsed electron beam, Surface cratering t lli i l i , l l tr , rf r t ri : i i ,

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

* Corresponding author. Tel.: +7-913-822-8512. E-mail address: llm@ispms.tsc.ru i t r. l.: - - - . - il : ll i .t .r rr

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 201 6 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. t r . li l i r . . i i ilit t i ti i itt . -

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.2016.06.186