PSI - Issue 14

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedirect.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 14 (2019) 449–466 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity 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. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2nd International Conference on Structural Integrity and Exhibition 2018 Small Scale Mechanical Testing for Additively Manufactured (Direct Metal Laser Sintered) Monolithic and Hybrid Test Samples Anigani Sudarshan Reddy, Dheepa Srinivasan INTECH DMLS Pvt.Ltd, Peenya, Bangalore-560058, India. Abstract Additive manufacturing using the laser based, powder bed fusion process (Direct metal laser sintering – DMLS) has been studied for room temperature mechanical (tensile) properties using small scale test specimens. Five different DMLS alloys, IN718, CoCrMo, Maraging steel, SS316L and Ti6Al4V along with tw hybrid alloys (DMLS CoCrMo on Cast FSX414 and DMLS SS316L on forged X20Cr13 steel) have been tested using micro tensile specimens (0.5 mm thickness, 2 mm gauge width and 6 mm gauge length). The specimens were machined out of DMLS blocks and tested in the as printed and heat treated condition. This study establishes the premise for small scale testing as a viable technique in laser additive manufacturing (DMLS), especially for its applicability in building hybrid parts on to conventionally manufactured parts as well as to serve as a quality control option during scaling up of AM parts, thereby contributing to productivity of production parts. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review nder esponsibility of Peer-review under responsibility of the SICE 2018 orga izers. Keywords: DMLS ; Tensile testing ; Sm ll cale test specimens ; Monolithic ; Hybrid ; IN718, CoCrMo ; Maraging Steel ; SS316L ; Ti6Al4V 1. Introduction Laser Additive Manufacturing (LAM) also called 3D printing, has gained a lot of popularity in the recent years, owing to its great potential in enabling customizable production for end users without multiple supply chain by Herzog et al. (2016). The p ocess nvolves layer by layer (20-100 µm layer) deposition to produce three dimensional near net shap parts or compone ts, that could revolutionize h way components are designed in achieving light weighted parts, combining several parts into one, ability to manufacture complex designs that have superior performance, reducing part inventory and thereby in enhancing the overall productivity by Moon et al. (2014) or Grigoriev et al. (2011) or Cooper et al. (2012). In this method, the parts are being built to net shape or near net shape, which helps to improve material and resource efficiency by Kobry et al. (2001). All these attributes have made LAM as a unique 2nd International Conference on Structural Integrity and Exhibition 2018 Small Scale Mechanical Testing for Additively Manufactured (Direct Metal Laser Sintered) Monolithic and Hybrid Test Samples Anigani Sudarshan Reddy, Dheepa Srinivasan INTECH DMLS Pvt.Ltd, Peenya, Bangalore-560058, India. Abstract Additive manufacturing using the las r based, powder bed fusion process (Direct metal laser sintering – DMLS) has been studied for room temperature mechanical (tensile) properties using small scale test pecimens. Five different DMLS alloys, IN718, CoCrMo, Ma aging steel, SS316L and Ti6Al4V along with two hybrid alloys (DMLS CoCrMo on Cast FSX414 an DMLS SS316L on forged X20Cr13 st el) have been tested using micro tensile specimens (0.5 mm thickness, 2 mm gauge width and 6 mm gauge ength). The specimen were m chined out of DMLS blocks and tested in the as pri ted and heat treated condition. This s udy est l shes the premise fo sm ll cale testi g as a viable technique in laser additive manufacturing (DMLS), especially f r its appli bility in building hybrid parts on to co ventionally manufactured parts s well as to serve as a quality control option during scaling up of AM parts, thereby contributing to productivity of production parts. © 2018 The Authors. Published by Elsevier B.V. Thi is an open access article under the CC BY-NC-ND lic nse (https://cr a ivecommons.org/licenses/by-nc-nd/4.0/) Sel ction and peer-review under r s onsibility of Peer-r v ew under responsibility of the SICE 2018 organizers. Keywords: DMLS ; Tensile testing ; Small sc e test sp cime s ; Monolithic ; Hybri ; IN718, CoCrMo ; Maraging St el ; SS316L ; Ti6Al4V 1. Introduction Laser Additive Ma ufacturing (LAM) also call d 3D printing, has gained a l t of popularity in the recent years, owing to its great otential in enabling customizable production for end users without m ltiple supply chai by He zog et l. (2016). The p ocess nvolves layer by layer (20-100 µm layer) deposition to produce three dimensional near net shape parts or components, that c uld revolutionize the way components are designed in achieving light weighted parts, combini g several parts into o e, ability to manufacture complex designs that have superior performance, reducing part inventory and thereby in en ancing the overall prod ctivity by Moon et al. (2014) or Grigoriev et al. (2011) or Cooper et al. (2012). In this method, the parts are being built to n t shape or near net shape, which helps to improve material and resource efficiency by Kobry et al. (2001). All these attributes have made LAM as a unique © 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.

2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is a open access article und r the CC BY-NC-ND lic nse (https://creat vecommons.org/licenses/by- c-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers.

* 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 PCF 2016. 2452-3216  2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 10.1016/j.prostr.2019.05.055