PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedirect.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 5 (2017) 1385–1392 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Wear damage of TiTaCN-Co cermets at room and elevated temperatures Pavol Hvizdoš a *, Ján Balko a , Martin Fides a , Ernesto Chicardi b a Institute of Materials Research (SAS), Watsonova 47, 04001 Košice, Sovakia b Instituto de Ciencia de Materiales de Sevilla (US-CSIC), Sevilla, Spain The work is focused on microstructure, mechanical and tribological properties of TiTaCN-Co based complex solid solution cermets with different graphite addition (0, 1.8, 2.2 %) with the typical use as cutting tools. The materials were prepared by the way of mechanochemical MSR (mechanically induced self-sustaining reaction), using a high energy milling of the starting constituents - Ti, Ta, C, and Co in nitrogen atmosphere. Then they were compacted by cold isostatic pressing and sintered at 1500 °C. Microstructure of the obtained materials was studied by SEM/EDX and assessed by image analysis. Hardness and indentation toughness were evaluated using Vickers indentation. Tribological tests were carried out on the high temperature tribometer THT Tribometer (CSM Ins ruments) to obtain riction coefficient. Ball-on-disc m thod was used. Wear testing was carr ed out under following conditions: normal load 5N, sliding distance 300 m, linear sliding velocity 0.1 m/s, atm sphere: air, temperatures: 25 °C, 200 °C, 400 °C, tribological static partners were WC-Co ball and st el ball with 6mm diameter. Created wear track was observed using scanning electron microscopy to identify wear mechanisms. Area of the wear track cross-section was measured using 3D optical profiler (SENSOFAR Plu neox) and the specific wear rate in terms of the volume loss was calculated according to the international standard ISO 20808. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Wear damage of TiTaCN- o cermets at oom and elevated temperatures Pavol Hvizdoš a *, Ján Balko a , Martin Fides a , Ernesto Chicardi b a Institu e of Materials Research (SAS), Watsonova 47, 04001 Košice, ovakia b Instituto de Ciencia de Materiales de Sevilla (US-CSIC), Sevilla, Spain Abstract The work is focused on microstructure, mechanical and tribological properties of TiTaCN-Co based complex solid solution cermets with different gr phite addition (0, 1.8, 2.2 %) with the typical use as cutti tools. Th mater als were prep red by the way of mech nochemical MSR (mechanically induced s lf-sustaining reaction), using a high energy milling of the tarting constituents - Ti, Ta, C, and Co in ni rog n atmosphere. Then they were compacted by col isostatic pressing and sintered at 1500 °C. Microstructure of the obtained materials was studied by SEM/EDX and assessed by image analysis. Hardness and indentation toughness w re evaluated using Vicke s indentation. Trib logica test were carried out on the high temperature tribometer THT Tribometer (CSM Inst uments) to obtain friction coeffi ient. Ball-on-disc m thod was used. Wear testing was car ied out under following c ditions: norm l load 5N, sliding dista ce 300 m, lin ar sliding velocity 0.1 m/ , atmos here: ai , temperatures: 25 °C, 200 °C, 400 °C, tribol gical static partners were WC-Co ball and steel ball with 6mm diameter. Cr a ed e r track was observed using scann ng electron microscopy to ide tify wear mechanisms. Area of the wear track cr -section was me sure using 3D optical profiler (SENSOFAR Plu neox) and the specific wear rate in terms of the volume loss was calculated according to the international standard ISO 20808. © 2017 The Autho s. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. © 2017 Th Authors. Published by Elsevier B.V. Peer-review und r responsibility of the Scientific Committe of ICSI 2017 Abstract

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: cermet; tribology; wear; damage; high temperature Keywords: cermet; tribology; wear; damage; high temperature

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

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.202 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216 © 2017 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. * Correspon ing aut or. Tel.: +421-55-7922402; fax: +421-55-7922408. E-mail address: phvizdos@saske.sk * Corresponding author. Tel.: +421-55-7922402; fax: +421-55-7922408. E-mail address: phvizdos@saske.sk