ISOTHERMAL AND THERMOMECHANICAL FATIGUE OF A NICKEL-BASE SUPERALLOY
Thermal gradients arising during transient regimes of start-up and shutdown operations produce a complex thermal and mechanical fatigue loading which limits the life of turbine blades and other engine components operating at high temperatures. More accurate and reliable assessment under non-isothe...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia, Materiais e Mineração
2014-06-01
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| Series: | Tecnologia em Metalurgia, Materiais e Mineração |
| Subjects: | |
| Online Access: | http://www.tecnologiammm.com.br/files/v11n2/v11n2a05.pdf |
| _version_ | 1811173703944241152 |
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| author | Carlos Carvalho Engler-Pinto Júnior Dirceu Spinelli |
| author_facet | Carlos Carvalho Engler-Pinto Júnior Dirceu Spinelli |
| author_sort | Carlos Carvalho Engler-Pinto Júnior |
| collection | DOAJ |
| description | Thermal gradients arising during transient regimes of start-up and shutdown operations produce a complex
thermal and mechanical fatigue loading which limits the life of turbine blades and other engine components operating at
high temperatures. More accurate and reliable assessment under non-isothermal fatigue becomes therefore mandatory.
This paper investigates the nickel base superalloy CM 247LC-DS under isothermal low cycle fatigue (LCF) and
thermomechanical fatigue (TMF). Test temperatures range from 600°C to 1,000°C. The behavior of the alloy is strongly
affected by the temperature variation, especially in the 800°C-1,000°C range. The Ramberg-Osgood equation fits very
well the observed isothermal behavior for the whole temperature range. The simplified non-isothermal stress-strain
model based on linear plasticity proposed to represent the thermo-mechanical fatigue behavior was able to reproduce
the observed behavior for both in-phase and out-of-phase TMF cycling. |
| first_indexed | 2024-04-10T17:51:30Z |
| format | Article |
| id | doaj.art-0ff5db52571049b5a9a1643e007c6ae5 |
| institution | Directory Open Access Journal |
| issn | 2176-1515 2176-1523 |
| language | English |
| last_indexed | 2024-04-10T17:51:30Z |
| publishDate | 2014-06-01 |
| publisher | Associação Brasileira de Metalurgia, Materiais e Mineração |
| record_format | Article |
| series | Tecnologia em Metalurgia, Materiais e Mineração |
| spelling | doaj.art-0ff5db52571049b5a9a1643e007c6ae52023-02-02T20:47:39ZengAssociação Brasileira de Metalurgia, Materiais e MineraçãoTecnologia em Metalurgia, Materiais e Mineração2176-15152176-15232014-06-01112125130http://dx.doi.org/10.4322/tmm.2014.019ISOTHERMAL AND THERMOMECHANICAL FATIGUE OF A NICKEL-BASE SUPERALLOYCarlos Carvalho Engler-Pinto Júnior0Dirceu Spinelli1ngenheiro Mecânico, Técnico Especialista, Ford Motor Company, Material Science Department, Dearborn, Michigan, EUA2 Engenheiro Mecânico, Professor Sênior, Departamento de Engenharia de Materiais, Escola de Engenharia de São Carlos, Universidade de São Paulo – USP, São Carlos, SP, Brasil.Thermal gradients arising during transient regimes of start-up and shutdown operations produce a complex thermal and mechanical fatigue loading which limits the life of turbine blades and other engine components operating at high temperatures. More accurate and reliable assessment under non-isothermal fatigue becomes therefore mandatory. This paper investigates the nickel base superalloy CM 247LC-DS under isothermal low cycle fatigue (LCF) and thermomechanical fatigue (TMF). Test temperatures range from 600°C to 1,000°C. The behavior of the alloy is strongly affected by the temperature variation, especially in the 800°C-1,000°C range. The Ramberg-Osgood equation fits very well the observed isothermal behavior for the whole temperature range. The simplified non-isothermal stress-strain model based on linear plasticity proposed to represent the thermo-mechanical fatigue behavior was able to reproduce the observed behavior for both in-phase and out-of-phase TMF cycling.http://www.tecnologiammm.com.br/files/v11n2/v11n2a05.pdfSuperalloy; Isothermal fatigue; Thermomechanical fatigue. |
| spellingShingle | Carlos Carvalho Engler-Pinto Júnior Dirceu Spinelli ISOTHERMAL AND THERMOMECHANICAL FATIGUE OF A NICKEL-BASE SUPERALLOY Tecnologia em Metalurgia, Materiais e Mineração Superalloy; Isothermal fatigue; Thermomechanical fatigue. |
| title | ISOTHERMAL AND THERMOMECHANICAL FATIGUE OF A NICKEL-BASE SUPERALLOY |
| title_full | ISOTHERMAL AND THERMOMECHANICAL FATIGUE OF A NICKEL-BASE SUPERALLOY |
| title_fullStr | ISOTHERMAL AND THERMOMECHANICAL FATIGUE OF A NICKEL-BASE SUPERALLOY |
| title_full_unstemmed | ISOTHERMAL AND THERMOMECHANICAL FATIGUE OF A NICKEL-BASE SUPERALLOY |
| title_short | ISOTHERMAL AND THERMOMECHANICAL FATIGUE OF A NICKEL-BASE SUPERALLOY |
| title_sort | isothermal and thermomechanical fatigue of a nickel base superalloy |
| topic | Superalloy; Isothermal fatigue; Thermomechanical fatigue. |
| url | http://www.tecnologiammm.com.br/files/v11n2/v11n2a05.pdf |
| work_keys_str_mv | AT carloscarvalhoenglerpintojunior isothermalandthermomechanicalfatigueofanickelbasesuperalloy AT dirceuspinelli isothermalandthermomechanicalfatigueofanickelbasesuperalloy |