PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Available o line at ww.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 1554–1559 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Int grity Procedia 00 (2018) 000–000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

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. Ecf22 - Loading and Environmental effects on Structural Integrity The Fatigue lifetime of AlZn10Si8Mg cast alloy with different percentage of iron Denisa Závodská a , Lenka Kuchariková a *, Eva Tillová a , Mario Guagliano b , Mária Chalupová a , Milan Uhríčik a , Juraj Belan a a Department of Materials Engineering, Faculty of Mechanical Engineering, University of Žilina,Univerzitná 1, 01026 Žilina, Slova k Republic b Dipartimento di Meccanica, Politecnico di Milano, Cam pus Bovisa Sud - via La Masa 1, 20156 Milano, Italy Abstract To increase the proportion of Al-cast alloys in a variety of industrial applications, it appears useful to control their fatigue behavior. In general, that behavior is affected by many factors, such as chemical composition, heat treatment, inclusions etc. The problem with utilization of the Al-scrap as a material for casting the Al-Si alloys lies in the fact that the scrap, unfortunately as a rule, is contaminated with iron. The Fe-rich intermetallics, formed during the solidification process, appear in a great variety of shapes and sizes. The most important are platelets or needles Al 5 FeSi, because they greatly decrease mechanical and corrosion properties of Al-cast alloys. The effect of the brittle Fe-rich phases on the fatigue properties in the secondary self-hardening AlZn10Si8Mg cast alloys with different percentage of iron (0.150 and 0.559 wt. %) was st died. Microstructure of alloys and the 3D-morphology f phases were analyzed by the optical and SEM microscopy. Rotati g bending fatigue tests w e realized for a defined numb r of cycles 3 x 10 6 . Th results s ow that with incr asing the co tent of F , the area proportion n th av rage length f Al 5 FeSi phases incr ased a significant influenced on the fat ue life and pores formation. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: secondary cast aluminum alloys, iron intermetallic phases, fatigue properties 1. Introduction Importance of the secondary aluminium production was increasing year after year. In the year 1976, the world production of the secondary aluminium was 18 % and in the year 2008 production increased to 31.6 %. All the Al- © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Ecf22 - Loading and Environmental effects on Structural Integrity The Fatigue lifetime of AlZn10Si8Mg cast alloy with different percentage of iron Denisa Závodská a , Lenka Kuchariková a *, Eva Tillová a , Mario Guagliano b , Mária Chalupová a , Milan Uhríčik a , Juraj Belan a a Department of Materials Engineering, Faculty of Mechanical Engineering, University of Žilina,Univerzitná 1, 01026 Žilina, Slova k Republic b Dipartimento di Meccanica, Politecnico d Mila o, Cam pus Bo isa Sud - v a La Masa 1, 20156 Milano, It ly Abstract To increase the proportion of Al-cast alloys in a variety of industrial applications, it appears useful to control their fatigue behavior. In gener l, that behavior is affected by many factors, such as chemical composition, heat treatment, i clusions etc. The problem with utilization of the Al-scrap as a material for casting t e Al-Si alloys lies in the fact that the scrap, unfortunately as a rule, is contaminated with iron. The Fe-rich intermetallics, formed during the solidification pro ess, app ar in a great variety of sh pes and sizes. The most imp rtant are platelets or needle Al 5 FeSi, because they greatly decrease mechanical and corrosion properties of Al-cas lloys. The effect of the brittle Fe-rich phases on the fatigu properties in the secondary self-hardening AlZ 10Si8Mg cast alloys with different p rcentag of iron (0.150 and 0.559 wt. %) was studied. Microstructure of alloys and the 3D-morphology of phases were analyzed by the ptical a d SEM microscopy. Ro ating bending fatigue tests were realized for a d fined number f cycles 3 x 10 6 . The result show that with increasing the onte t of Fe, the area pro o tion an the averag length of Al 5 F Si phases incr ased a significant influenced on the fatigue life and por s f rmation. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: secondary cast aluminum alloys, iron intermetallic phases, fatigue properties 1. Introduction Importance of the secondary aluminium production was increasing year after year. In the year 1976, the world production of the econdary aluminium was 18 % and in the year 2008 production increased to 31.6 %. All the Al- © 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 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the ECF22 o ganizers. * Corresponding author. Tel.: +421-41-513 2626; fax: +421-41-565 2940. E-mail address: lenka.kucharikova@fstroj.uniza.sk * Corresponding author. Tel.: +421-41-513 2626; fax: +421-41-565 2940. E-mail ad ress: lenka kucharikova@fstroj.uniza.sk

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

2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.317