Modification of creep and low cycle fatigue behaviour induced by welding
In this work, the mechanical properties of Waspaloy superalloy have been evaluated in case of welded repaired material and compared to base material. Test program considered flat specimens on base and TIG welded material subjected to static, low-cycle fatigue and creep test at different temperatur...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2014-10-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_42.pdf |
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| author | A. Carofalo V. Dattoma R. Nobile F.W. Panella G. Alfeo A. Scialpi G.P. Zanon |
| author_facet | A. Carofalo V. Dattoma R. Nobile F.W. Panella G. Alfeo A. Scialpi G.P. Zanon |
| author_sort | A. Carofalo |
| collection | DOAJ |
| description | In this work, the mechanical properties of Waspaloy superalloy have been evaluated in case of
welded repaired material and compared to base material. Test program considered flat specimens on base and
TIG welded material subjected to static, low-cycle fatigue and creep test at different temperatures.
Results of uniaxial tensile tests showed that the presence of welded material in the gage length specimen does
not have a relevant influence on yield strength and UTS. However, elongation at failure of TIG material was
reduced with respect to the base material.
Moreover, low-cycle fatigue properties have been determined carrying out tests at different temperature (room
temperature RT and 538°C) in both base and TIG welded material. Welded material showed an increase of the
data scatter and lower fatigue strength, which was anyway not excessive in comparison with base material.
During test, all the hysteresis cycles were recorded in order to evaluate the trend of elastic modulus and
hysteresis area against the number of cycles. A clear correlation between hysteresis and fatigue life was found.
Finally, creep test carried out on a limited number of specimens allowed establishing some changes about the
creep rate and time to failure of base and welded material. TIG welded specimen showed a lower time to reach
a fixed strain or failure when a low stress level is applied. In all cases, creep behaviour of welded material is
characterized by the absence of the tertiary creep. |
| format | Article |
| id | doaj-art-4f4ecfde8a0b40149dffe00618d92f28 |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2014-10-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-4f4ecfde8a0b40149dffe00618d92f282025-01-02T22:38:04ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932014-10-0183034935910.3221/IGF-ESIS.30.42Modification of creep and low cycle fatigue behaviour induced by weldingA. Carofalo0V. Dattoma1R. Nobile2F.W. Panella3G. Alfeo4A. Scialpi5G.P. Zanon6Università del Salento - Dipartimento di Ingegneria dell’InnovazioneUniversità del Salento - Dipartimento di Ingegneria dell’InnovazioneUniversità del Salento - Dipartimento di Ingegneria dell’InnovazioneUniversità del Salento - Dipartimento di Ingegneria dell’InnovazioneGE Avio srl– Ingegneria – Ricerca e Sviluppo TecnologicoGE Avio srl – Ingegneria – Progettazione Componenti MotoriGE Avio srl – Ingegneria – Ricerca e Sviluppo TecnologicoIn this work, the mechanical properties of Waspaloy superalloy have been evaluated in case of welded repaired material and compared to base material. Test program considered flat specimens on base and TIG welded material subjected to static, low-cycle fatigue and creep test at different temperatures. Results of uniaxial tensile tests showed that the presence of welded material in the gage length specimen does not have a relevant influence on yield strength and UTS. However, elongation at failure of TIG material was reduced with respect to the base material. Moreover, low-cycle fatigue properties have been determined carrying out tests at different temperature (room temperature RT and 538°C) in both base and TIG welded material. Welded material showed an increase of the data scatter and lower fatigue strength, which was anyway not excessive in comparison with base material. During test, all the hysteresis cycles were recorded in order to evaluate the trend of elastic modulus and hysteresis area against the number of cycles. A clear correlation between hysteresis and fatigue life was found. Finally, creep test carried out on a limited number of specimens allowed establishing some changes about the creep rate and time to failure of base and welded material. TIG welded specimen showed a lower time to reach a fixed strain or failure when a low stress level is applied. In all cases, creep behaviour of welded material is characterized by the absence of the tertiary creep.http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_42.pdfLow-cycle fatigueWelding |
| spellingShingle | A. Carofalo V. Dattoma R. Nobile F.W. Panella G. Alfeo A. Scialpi G.P. Zanon Modification of creep and low cycle fatigue behaviour induced by welding Fracture and Structural Integrity Low-cycle fatigue Welding |
| title | Modification of creep and low cycle fatigue behaviour induced by welding |
| title_full | Modification of creep and low cycle fatigue behaviour induced by welding |
| title_fullStr | Modification of creep and low cycle fatigue behaviour induced by welding |
| title_full_unstemmed | Modification of creep and low cycle fatigue behaviour induced by welding |
| title_short | Modification of creep and low cycle fatigue behaviour induced by welding |
| title_sort | modification of creep and low cycle fatigue behaviour induced by welding |
| topic | Low-cycle fatigue Welding |
| url | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_42.pdf |
| work_keys_str_mv | AT acarofalo modificationofcreepandlowcyclefatiguebehaviourinducedbywelding AT vdattoma modificationofcreepandlowcyclefatiguebehaviourinducedbywelding AT rnobile modificationofcreepandlowcyclefatiguebehaviourinducedbywelding AT fwpanella modificationofcreepandlowcyclefatiguebehaviourinducedbywelding AT galfeo modificationofcreepandlowcyclefatiguebehaviourinducedbywelding AT ascialpi modificationofcreepandlowcyclefatiguebehaviourinducedbywelding AT gpzanon modificationofcreepandlowcyclefatiguebehaviourinducedbywelding |