PSI - Issue 13

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ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 2065–2 7 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000

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 Impact toughness of components made by GMAW based additive manufacturing Ali Waqas a *, Qin Xiansheng a , Xiong Jiangtao a , Yang Chaoran a , Liu Fan a a Northwestern Polytechnical University, Xi’an 710 072 China Additive manufacturing of metals is an innovative near-net-shaped manufacturing technology used for producing final solid objects by depositing successive layers of material melted in powder or wire form using a focused heat source directed from an electron beam, laser beam, or plasma or electric arc. Wire arc additive manufacturing (WAAM) techniques, although have lesser precision as compared to laser or electron beam techniques but have the advantage of lower cost and lesser time required. In this research, gas met l arc welding (GMAW) process has been used using AWS ER70S-6 electrode wire to create a multi-layer single pass structure after controlling the parameters including current, voltage and travel speed so that uniform height is attained throughout the weld bead. The esulting material may have different dir ctional mechanical propertie becaus of factors including different penetrat on properties and bonding strength and al o pre eating and post-heating effec s of success ve layers. This study focuses on the impact toughness of the resulting material. Charpy impact test is carried out on the samples taken i both al ng the direction of deposition and in the direction perpendicular to it to analyze the impact toughness in different directions. To further investig te the behavior of the structure, Brinell hardness, metallography and fractography have been performed. The results show that material has high impact toughness with very ductile behavior. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. © 2018 The Auth rs. Published by Elsevier B.V. Peer-review under responsibility of he ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Impact toughness of components made by GMAW based additive manufacturing Ali Waqas a *, Qin Xiansheng a , Xiong Jiangtao a , Yang Chaoran a , Liu Fan a a Northwestern Polytechnical University, Xi’an 710 072 China Abstract dditive manufacturing of metals is an innovative near-net-shaped manufacturing technology used for producing final solid objects by depositing successive layers of material melted in powder or wire form using a focused heat source directed from an electron beam, laser beam, or plasma or electric arc. Wire arc additive manuf cturing (WAAM) techniques, alth ugh have lesser precision as compared to las r or electron beam techniques but have the advantage of lower c st an l sser tim requir . In this r s arch, gas etal arc welding (GMAW) process has b en use using AWS ER70S-6 electrod wire to create a multi-layer single pass structure after controlling the parameters including current, voltage and travel sp ed so that uniform h ight is attai ed throughout the weld bead. The resulting material may have differ nt directional mechanical properties b cause of factors including different penetration properties and bonding strength an also pr heating and post-heating ffects of successive layer . This study focuses on the impact toughness of the resulting material. Charpy impact test is carried out n the samples taken in b th along the direction of deposition and in the direction perp dicular to it to analyze the impact toughness in different directions. To further investigate the b havior of the structure, Brinell hardness, metallography and fractography have been performed. The results show t at material has high impact toughness with very ductile behavior. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Additive manufacturing; GMAW; Charpy impact test; impact toughness; ductile Abstract

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: Additive manufacturing; GMAW; Charpy impact test; impact toughness; ductile

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 responsibility of the ECF22 organizers. * Corresponding author. Tel.: +86-15502970710;. E-mail address: aliwaqas@mail.nwpu.edu.cn * Corresponding author. Tel.: +86-15502970710;. E-mail address: aliwaqas@mail.nwpu.edu.cn

2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.207

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