PSI - Issue 13

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 Structu al Integrity 13 (2018) 843–848 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

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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. ECF22 - Loading and Environmental effects on Structural Integrity Fracture and Damage Behavior in an Advanced Heat Resistant Austenitic Stainless Steel During LCF, TMF and CF Hugo Wärner a *, Mattias Calmunger a , Guocai Chai a,b , Jaroslav Polák c , Roman Petráš c , Milan Heczko c , Tomáš Kruml c , Sten Joha sson a and Johan Moverare a a Engneering Materials, Linköping University, Linköping, 581 83, Sweden b Strategy Research, Sandvik Materials Technology, Sandviken, 811 81, Sweden c Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno, 623 00, Czech Republic Future advanced ultra-supercritical power plant will be run at higher temperature and pressure. New materials will be used to meet the requirements. However, the structure integrity of these materials needs to be evaluated. Sanicro 25 is a newly developed advanced austenitic heat resistant stainless steel with the aim to be used in future 700 °C or 650 °C power plants to replace part of Ni based alloys. This paper provides an overview on the fracture and damage behavior in this material during LCF, TMF and CF. The cyclic hardening and fatigue life during LCF, TMF and CF will be discussed. The influence of prolonged service degradation has been analyzed by the use of pre-aged material for TMF and CF loading conditions. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: AUSC power plant; austenitic heat resistant stainless steel; Sanicro 25; low cycle fatigue; thermomechanical fatigue; creep-fatigue interaction Advanced ultra-super critical (A-USC) thermal power plants are believed to be of high importance for the next generation energy production since they have efficiencies above 50 %. The increased temperature (700 °C) and pressure (35 MPa) is the main reason for the high efficiency. For the components subjected to the highest temperatures such as superheaters and reheaters materials are necessary to provide sufficient high temperature properties, as e.g. creep and fatigue resistance in presence of corrosive environments of the flue gases on the fireside and resist steam oxidation on the internal tube surfaces (Gibbons 2013; Blum et al. 2004). © 2018 The Authors. P blished by Elsevier B.V. Peer-review und responsibility of the ECF22 organiz rs. ECF22 - Loading and Environmental effects on Structural Integrity Fracture and Damage Behavior in an Advanced Heat Resistant Austenitic Stainless Steel During LCF, TMF and CF Hugo Wärner a *, Mattias Calmunger a , Guocai Chai a,b , Jaroslav Polák c , Roman Petráš c , Milan Heczko c , Tomáš Kruml c , Sten Johansson a and Johan Moverare a a Engneering Materials, Linköping University, Linköping, 581 83, Sweden b Strate y Research, Sandvik Materials Technology, Sandviken, 811 81, Sweden c Institute of Physics of Materials, Ac emy of Sciences of the Czech Republic, Brno, 623 00, Czech Republic Abstract Future advanced ultra-supercritical power plant will be run at higher temperature and pressure. New materials will be used to meet the requirements. Howev r, the structure integrity of these materials needs to be evaluated. Sanicro 25 i a newly developed advanced austenitic heat r sistant stainless ste l with the aim to b used in future 700 °C or 650 °C power plants to replace part of Ni based alloys. This paper provides an overvie on t fracture and damage b havior in this material during LCF, TMF and CF. The cyclic hardening and fatigue life during LCF, TMF and CF will be discussed. The influence of prolonged service degradation has been analyz d by the use of pre-aged material for TMF and CF loading conditions. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: AUSC power plant; austenitic heat resistant stainless steel; Sanicro 25; low cycle fatigue; thermomechanical fatigue; creep-fatigue interaction 1. Introduction Advanced ultra-su er critical (A-USC) thermal power plants are believed to be of high importance for the next generation energy production since they have efficiencies above 50 %. The increased temperature (700 °C) and pressure (35 MPa) is the main reason for the high efficiency. For the components subjected to the highest temperatures such as superheaters and reheaters materials are necessary to provide sufficient high temperature properties, as e.g. creep and fatigue resistance in presence of corrosive environments of the flue gases on the fireside and resist steam oxidation on the internal tube surfaces (Gibbons 2013; Blum et al. 2004). © 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. Abstract 1. Introduction

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. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the ECF22 organizers. * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt * Corresponding author. Tel.: +4613-282213; fax: +4613-281101. E-mail address: hugo.warner@liu.se * Corresponding author. Tel.: +4613-282213; fax: +4613-281101. E-mail address: h go.warner@liu.se

2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.161