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) 119–126 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://cr ativecommo s.org/license /by-nc-nd/4.0/) Sel io and peer-review under responsibility of Peer-review under responsibility of t e SICE 2018 organizers. 2nd International Conference on Structural Integrity and Exhibition 2018 Surface Alloying of Titanium Di-boride (TiB 2 ) and Silicon Carbide (SiC) on Aluminium Al 5052 using Electric Discharge Processing Sandeep Das 1 , Randhir Kumar Raman 2 , N. Devarani 3 , and Shrikrishna N. Joshi 4 * 1 Dumka Engineering College, Dumka Pin- 814101, Jharkhand, India. 2,4 Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Pin- 781039, Assam, India. 3 Farm Machinery and Power Engineering, College of Agricultural Engineering & Post Harvest Technology (CAEPHT), Central Agricultural University, Ranipool, Pin-737102, Sikkim, India. Abstract This paper presents an experimental study on alloying of industrial useful materials viz. titanium di-boride (TiB 2 ) and silicon carbide (SiC) on Al 5052 alloy using electric-discharge based surface treatment. Electric discharges are obtained by using electric discharge machine (EDM). The alloying powders are mixed and an electrode is formed using powder metallurgy method. The prepared electrode is used in EDM machine to transfer the electrode material onto the Al substrate. Extensive experiments have been carried out to transfer TiB 2 -SiC on Al5052 substrate. Systematic characterization of alloying thickness and measurement of hardness has been performed. The cross-sectional thickness after alloying is analysed using optical microscopy and is found to be in the range of 90 µm. Energy Dispersive X-ray (EDX) spectrometry shows a significant percentage of titanium, silicon, carbon and moderate percentage of boron transferred during the alloying process. Results concluded that electric discharges can be used as an economical and efficient alternative to achieve desired surface properties on industrial 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 under responsibility of Peer-review under responsibility of the SICE 2018 organizers. Keywords: TiB 2 , SiC, Electric discharge alloying (EDA); Powder metallurgy (P/M); Al5052 alloy; Surface alloying; Deposition parameters 2nd International Conference on Structural Integrity and Exhibition 2018 Surface Alloying of Titanium Di-boride (TiB 2 ) and Silicon Carbide (SiC) on Aluminium Al 5052 using Electric Discharge Processing Sandeep Das 1 , Randhir Kumar Raman 2 , N. Devarani 3 , and Shrikrishna N. Joshi 4 * 1 Dumka Engineering College, Dumka Pin- 814101, Jharkhand, India. 2,4 Department of Mechan cal E ineering, Indian Institute of Technology Guwah ti, Guwa ati, Pin- 781039, Assam, India. 3 Farm Machinery and Power Engineering, College of Agricultural Engineering & Post Harvest Technology (CAEPHT), Central Agricultural University, Ranipool, Pin-737102, Sikkim, India. Abstract This paper presents an experimental study on alloying of industrial useful materials viz. tit nium di-boride (TiB 2 ) a d silicon carbide (SiC) on Al 5052 alloy using electric-disch rge bas surface tr a ment. Electric discharges ar obtained b using electric discharge machin (EDM). The alloying powde s ar mixed and an elect ode is formed using powder metallurgy method. Th prepared electrode is u ed in EDM machine to transfer he electrode mate ial onto the Al substrate. Exten ive exp riments have been carried out to transfer TiB 2 -SiC on Al5052 substrat . Systematic characterization of alloy ng th kness and measurement of hardness has been performed. The cro s-sectional thickness after allo ing is analysed using optical microscopy and s f und to be i the range of 90 µm. Energy Dispersive X-ray (EDX) spectromet y shows a significant percen age of titanium, sili o , carbon nd moderate percentage of boron tr nsferred during the alloying process. Results concluded that electric discharges can be used as an economical and efficient alternative to achieve desired surface properties on industrial parts. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND lic nse (https://creat vecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. Keywords: TiB 2 , SiC, Electric discharge alloying (EDA); Powder metallurgy (P/M); Al5052 alloy; Surface alloying; Deposition parameters

© 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.: +91 361 258 2678; fax: +91 361 258 2699. E-mail address: snj@iitg.ac.in * Correspon ing author. Tel.: +91 361 258 2678; fax: +91 361 258 2699. E-mail address: snj@iitg.ac.in

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.2019.05.016