Mechanisms of plastic instability and fracture of compressed and tensile tested Mg-Li alloys investigated using the acoustic emission method
The results of the investigation of both mechanical and acoustic emission (AE) behaviors of Mg4Li5Al alloy subjected to compression and tensile tests at room temperature are compared with the test results obtained using the same alloy and loading scheme but at elevated temperatures. The main aim o...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2016-01-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero35/numero_35_art_03.pdf |
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| _version_ | 1841562935178035200 |
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| author | A. Pawełek A. Piątkowski W. Wajda W. Skuza A. Tarasek W. Ozgowicz B Grzegorczyk Z. Ranachowski S. Kúdela S. Kúdela, Jr. |
| author_facet | A. Pawełek A. Piątkowski W. Wajda W. Skuza A. Tarasek W. Ozgowicz B Grzegorczyk Z. Ranachowski S. Kúdela S. Kúdela, Jr. |
| author_sort | A. Pawełek |
| collection | DOAJ |
| description | The results of the investigation of both mechanical and acoustic emission (AE) behaviors of
Mg4Li5Al alloy subjected to compression and tensile tests at room temperature are compared with the test
results obtained using the same alloy and loading scheme but at elevated temperatures. The main aim of the
paper is to investigate, to determine and to explain the possible influence of factors related with enhanced
internal stresses such as: segregation of precipitates along grain boundaries or solute atoms along dislocations
(Cottrell atmospheres) or dislocation pile-ups at grain boundaries which create very high stress concentration
leading to fracture. The results show that the plastic instabilities are related to the Portevin–Le Châtelier
phenomenon (PL effect) and they are correlated with the generation of AE peaks. The fractography of breaking
samples was analyzed on the basis of light (optical), TEM and SEM images. |
| format | Article |
| id | doaj-art-9088b7beac324c478e58a040e98d907d |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-9088b7beac324c478e58a040e98d907d2025-01-03T00:38:54ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932016-01-011035213010.3221/IGF-ESIS.35.03Mechanisms of plastic instability and fracture of compressed and tensile tested Mg-Li alloys investigated using the acoustic emission methodA. Pawełek0A. Piątkowski1W. Wajda2W. Skuza3A. Tarasek4W. Ozgowicz5B Grzegorczyk6Z. Ranachowski7S. Kúdela8S. Kúdela, Jr.9Polish Academy of Sciences, Cracow, PolandPolish Academy of Sciences, Cracow, PolandPolish Academy of Sciences, Cracow, PolandPolish Academy of Sciences, Cracow, PolandPolish Academy of Sciences, Cracow, PolandSilesian University of Technology, Gliwice, PolandSilesian University of Technology, Gliwice, PolandPolish Academy of Sciences, Warsaw, PolandSlovak Academy of Sciences, Bratislava, Slovak RepublicSlovak Academy of Sciences, Bratislava, Slovak RepublicThe results of the investigation of both mechanical and acoustic emission (AE) behaviors of Mg4Li5Al alloy subjected to compression and tensile tests at room temperature are compared with the test results obtained using the same alloy and loading scheme but at elevated temperatures. The main aim of the paper is to investigate, to determine and to explain the possible influence of factors related with enhanced internal stresses such as: segregation of precipitates along grain boundaries or solute atoms along dislocations (Cottrell atmospheres) or dislocation pile-ups at grain boundaries which create very high stress concentration leading to fracture. The results show that the plastic instabilities are related to the Portevin–Le Châtelier phenomenon (PL effect) and they are correlated with the generation of AE peaks. The fractography of breaking samples was analyzed on the basis of light (optical), TEM and SEM images.http://www.gruppofrattura.it/pdf/rivista/numero35/numero_35_art_03.pdfLightweight AlloysAcoustic EmissionPortevin–Le Châtelier PhenomenonTwinningDislocationsShear Bands |
| spellingShingle | A. Pawełek A. Piątkowski W. Wajda W. Skuza A. Tarasek W. Ozgowicz B Grzegorczyk Z. Ranachowski S. Kúdela S. Kúdela, Jr. Mechanisms of plastic instability and fracture of compressed and tensile tested Mg-Li alloys investigated using the acoustic emission method Fracture and Structural Integrity Lightweight Alloys Acoustic Emission Portevin–Le Châtelier Phenomenon Twinning Dislocations Shear Bands |
| title | Mechanisms of plastic instability and fracture of compressed and tensile tested Mg-Li alloys investigated using the acoustic emission method |
| title_full | Mechanisms of plastic instability and fracture of compressed and tensile tested Mg-Li alloys investigated using the acoustic emission method |
| title_fullStr | Mechanisms of plastic instability and fracture of compressed and tensile tested Mg-Li alloys investigated using the acoustic emission method |
| title_full_unstemmed | Mechanisms of plastic instability and fracture of compressed and tensile tested Mg-Li alloys investigated using the acoustic emission method |
| title_short | Mechanisms of plastic instability and fracture of compressed and tensile tested Mg-Li alloys investigated using the acoustic emission method |
| title_sort | mechanisms of plastic instability and fracture of compressed and tensile tested mg li alloys investigated using the acoustic emission method |
| topic | Lightweight Alloys Acoustic Emission Portevin–Le Châtelier Phenomenon Twinning Dislocations Shear Bands |
| url | http://www.gruppofrattura.it/pdf/rivista/numero35/numero_35_art_03.pdf |
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