PSI - Issue 2_B

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 1266–1276 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000–000 il l li t . i ir t. tructural Integrity rocedia 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 Wear study of Innovative Ti-Ta alloys Morgado T. L. M. a,b *, Navas H. c , Brites R. c a CeFEMA - Center of Physics and Engineering of Advanced Materials, Lisbon University, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal b Polytechnic Institute of Tomar, Quinta do Contador Estrada da Serra, 2300-313 Tomar, Portugal c UNIDEMI- Department of Mechanical and Industrial Engineering, Faculty of Science and Technology, Universidade Nova de Lisboa, Campus da Caparica, 2829-516 Caparica,Portugal Abstract In this paper a wear study of innovative Ti-Ta alloys is present. Samples of Ti-30%Ta, Ti-52%Ta, were produced by laser cladding. This technology uses a high power density generated by a laser beam to melt the base material and the filler material. The interaction between the laser and the substrate is a function of the radiation absorption properties of the material and that conditions the heat flow. Laser technology allows working with high temperatures and melting powders of titanium and the alloying elements as tantalum. As this is a continuous process enables rapid cooling of the molten material and the consequent solidification. The principal importance of these innovative alloys is the low Young’s Modulus, the closest to Young´s Modulus of the bone, the biocompatibility of titanium and tantalum and conseq ently its applicability to biome ical industry. The wear behavior is an important factor that influences the structural integrity of materials and must be studied for innovative alloys. So in this work the micro-scale abrasive wear tests were used to characterize the wear behavior of Ti-30%Ta, Ti-52%Ta alloys. The results shows that the wear volume increases linearly as the rotation of the ball test and with the sliding distance and the analysis of the ball cratering shows that for this test there just grooving abrasion and the volume wear abrasion is higher for the highest hardness alloy. © 2016 The Authors. Published by Elsevier B.V. Peer‐review under responsibility of the Scientific Committee of ECF21. , t i , It l . . . a, , . c , it . c a e - enter of hysics a d ngineering of dvanced aterials, isbon niversity, v. ovisco ais 1, 1049-001 Lisboa, Portugal b olytechnic Institute of o ar, Quinta do Contador Estrada da Serra, 2300-313 Tomar, Portugal c I I- epart ent of echanical and Industrial ngineering, aculty of Science and echnology, niversidade ova de isboa, a pus da aparica, 2829-516 Caparica,Portugal str ct I t is a er a ear st f i ati e i- a all s is rese t. a les f i- a, i- a, ere r ce laser cla i . is tec l ses a i er e sit e erate a laser ea t elt t e ase aterial a t e filler aterial. e i teracti et ee t e laser a t e s strate is a f cti f t e ra iati a s r ti r erties f t e aterial a t at c iti s t e eat fl . aser tec l all s r i it i te erat res a elti ers f tita i a t e all i ele e ts as ta tal . s t is is a c ti s r cess e a les ra i c li f t e lte aterial a t e c se e t s li ificati . e ri ci al i rta ce f t ese i ati e all s is t e l ’s l s, t e cl sest t ´s l s f t e e, t e i c ati ilit f tita i a ta tal a c se e tl its a lica ilit t i e cal i s r . e ear e a i r is a i rta t fact r t at i fl e ces t e str ct ral i te rit f aterials a st e st ie f r i ati e all s. i t is r t e icr -scale a rasi e ear tests ere se t c aract rize t e ear e a i r f i- a, i- a all s. e res lts s s t at t e ear l e i creases li earl as t e r tati f t e all test a it t e sli i ist e a t e a al sis f t e all crateri s s t at f r t is test t ere j st r i a rasi a t e l e ear a rasi is i er f r t e i est ar ess all . t rs. lis y ls vi r . . Peer‐review under responsibility of the Scientific Committee of F 1. Copyright © 2016 The Authors. Published y Elsevier B.V. T is is an ope access art cle und r 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. t r f r r t r , , -

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: Ti-Ta alloys, laser cladding, wear, innovative mettalic alloys, biomedical aplications ey ords: i-Ta alloys, laser cladding, ear, innovative mettalic alloys, biomedical aplications

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Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. 1. Introduction Wear is a common form of material degradation that can occur during extended periods of service and, if unchecked, can significantly impair structural integrity. Wear is a progressive phenomenon and failures due to wear r is f r f t ri l r ti t t r ring extended periods of service and, if , si ifi tl i ir str t r l i t rit . r is r r ssi phenomenon and failures due to wear

* 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 he uthors. ublished by lsevier . . eer-re ie er res si ilit f t e cie tific ittee f . * Corresponding author. Tel.: +351-218-418-137; fax: +351-241-361-175. E-mail address: teresa.morgado@tecnico.ulisboa.pt * orresponding author. el.: 351-218-418-137; fax: 351-241-361-175. - ail address: teresa. orgado tecnico.ulisboa.pt

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.2016.06.162