The Effect of Specimen Size and Test Procedure on the Creep Behavior of ME21 Magnesium Alloy
Lightweight constructions and materials offer the opportunity to reduce CO<sub>2</sub> emissions in the transport sector. As components in vehicles are often exposed to higher temperatures above 40% of the melting temperature, there is a risk of creep. The creep behavior usually is inves...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/11/8/918 |
| _version_ | 1827685516020023296 |
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| author | Bettina Camin Maximilian Gille |
| author_facet | Bettina Camin Maximilian Gille |
| author_sort | Bettina Camin |
| collection | DOAJ |
| description | Lightweight constructions and materials offer the opportunity to reduce CO<sub>2</sub> emissions in the transport sector. As components in vehicles are often exposed to higher temperatures above 40% of the melting temperature, there is a risk of creep. The creep behavior usually is investigated based on standard procedures. However, lightweight constructions frequently have dimensions not adequately represented by standardized specimen geometries. Therefore, comparative creep experiments on non-standardized miniature and standardized specimens are performed. Due to a modified test procedure specified by a miniature creep device, only the very first primary creep stage shows a minor influence, but subsequently, no effect on the creep process is detected. The creep behavior of hot extruded and heat treated ME21 magnesium alloy is investigated. It is observed that the creep parameters determined by the miniature and standard creep tests are different. As the deviations are systematic, qualitatively, evidence of the creep behavior is achieved. The creep parameters obtained, and particularly the creep strain and the strain rate, show a higher creep resistance of the miniature specimen. An initial higher number of twinned grains and possible multiaxiality in the gauge volume of the miniature specimen can be responsible. |
| first_indexed | 2024-03-10T08:53:49Z |
| format | Article |
| id | doaj.art-a082ea5ed20c46e69faa86d223964af5 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T08:53:49Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-a082ea5ed20c46e69faa86d223964af52023-11-22T07:16:51ZengMDPI AGCrystals2073-43522021-08-0111891810.3390/cryst11080918The Effect of Specimen Size and Test Procedure on the Creep Behavior of ME21 Magnesium AlloyBettina Camin0Maximilian Gille1Faculty III-Process Sciences, Institute of Materials Sciences and Technology, Technische Universität Berlin, Sekr. BH18, Ernst-Reuter-Platz 1, 10587 Berlin, GermanyFaculty III-Process Sciences, Institute of Materials Sciences and Technology, Technische Universität Berlin, Sekr. BH18, Ernst-Reuter-Platz 1, 10587 Berlin, GermanyLightweight constructions and materials offer the opportunity to reduce CO<sub>2</sub> emissions in the transport sector. As components in vehicles are often exposed to higher temperatures above 40% of the melting temperature, there is a risk of creep. The creep behavior usually is investigated based on standard procedures. However, lightweight constructions frequently have dimensions not adequately represented by standardized specimen geometries. Therefore, comparative creep experiments on non-standardized miniature and standardized specimens are performed. Due to a modified test procedure specified by a miniature creep device, only the very first primary creep stage shows a minor influence, but subsequently, no effect on the creep process is detected. The creep behavior of hot extruded and heat treated ME21 magnesium alloy is investigated. It is observed that the creep parameters determined by the miniature and standard creep tests are different. As the deviations are systematic, qualitatively, evidence of the creep behavior is achieved. The creep parameters obtained, and particularly the creep strain and the strain rate, show a higher creep resistance of the miniature specimen. An initial higher number of twinned grains and possible multiaxiality in the gauge volume of the miniature specimen can be responsible.https://www.mdpi.com/2073-4352/11/8/918creep testingME21magnesium alloysize effectsminiature specimen |
| spellingShingle | Bettina Camin Maximilian Gille The Effect of Specimen Size and Test Procedure on the Creep Behavior of ME21 Magnesium Alloy Crystals creep testing ME21 magnesium alloy size effects miniature specimen |
| title | The Effect of Specimen Size and Test Procedure on the Creep Behavior of ME21 Magnesium Alloy |
| title_full | The Effect of Specimen Size and Test Procedure on the Creep Behavior of ME21 Magnesium Alloy |
| title_fullStr | The Effect of Specimen Size and Test Procedure on the Creep Behavior of ME21 Magnesium Alloy |
| title_full_unstemmed | The Effect of Specimen Size and Test Procedure on the Creep Behavior of ME21 Magnesium Alloy |
| title_short | The Effect of Specimen Size and Test Procedure on the Creep Behavior of ME21 Magnesium Alloy |
| title_sort | effect of specimen size and test procedure on the creep behavior of me21 magnesium alloy |
| topic | creep testing ME21 magnesium alloy size effects miniature specimen |
| url | https://www.mdpi.com/2073-4352/11/8/918 |
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