Precipitation Processes in Al-Mg-(Mn,Cu) Type Alloy Sheets Evaluated Through Electrical Resistivity Variations
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2010
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Precipitation/dissolution processes were followed by electrical resistivity variations in Al-Mg-(Mn)-Cu and Al-Mg-Mn type alloy sheets after different thermo-mechanical treatments (TMTs). In order to get an insight into the precipitation processes during processing of Al-Mg type alloys, some samples were solution treated at 535A degrees C/1 h, and some of them were recrystallization annealed at 320A degrees A center dot 350A degrees C/3 h. After that all the samples were treated in a same manner: cold rolling to 50-60% and final annealing at temperatures in the range of 220A degrees A center dot 470A degrees C/3 h. It was supposed that the structure of samples pre-treated by recrystallization annealing at 320A degrees/350A degrees C is characterized with S type (Al(2)MgCu) phases in the Al-Mg-(Mn)-Cu alloys and with beta'/beta (Mg(5)Al(8)) phases in the Al-Mg-Mn alloys. These structure features are rather unchangeable during the subsequent cold rolling and annealing treatments in the t...emperature range of 220A degrees A center dot 320A degrees C. During annealing at higher temperatures (such as 470A degrees C) precipitation of Mn-bearing particles (MnAl(6) or (Fe,Mn)Al(6)) might occur in both type of alloys. After solution treatment at 535A degrees C most of the alloying elements are dissolved into solid solution, thus inducing a high potential for precipitation processes during annealing at 220A degrees A center dot 470A degrees C. The cold deformation was found to contribute the electrical resistivity intensively at the beginning of deformation (in the range up to similar to 20%), and it was not influenced by the chemical composition of tested alloys. The resistivity variations with the cold deformation were fitted by power-law equations.
Ključne reči:
Al-Mg-(Mn,Cu) alloys / Precipitation / Electrical resistivityIzvor:
Journal of Nondestructive Evaluation, 2010, 29, 1, 43-48Izdavač:
- Springer/Plenum Publishers, New York
DOI: 10.1007/s10921-010-0064-6
ISSN: 0195-9298
WoS: 000274904100005
Scopus: 2-s2.0-77649274074
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Romhanji, Endre AU - Popović, Miljana AU - Stanojević, S. PY - 2010 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1677 AB - Precipitation/dissolution processes were followed by electrical resistivity variations in Al-Mg-(Mn)-Cu and Al-Mg-Mn type alloy sheets after different thermo-mechanical treatments (TMTs). In order to get an insight into the precipitation processes during processing of Al-Mg type alloys, some samples were solution treated at 535A degrees C/1 h, and some of them were recrystallization annealed at 320A degrees A center dot 350A degrees C/3 h. After that all the samples were treated in a same manner: cold rolling to 50-60% and final annealing at temperatures in the range of 220A degrees A center dot 470A degrees C/3 h. It was supposed that the structure of samples pre-treated by recrystallization annealing at 320A degrees/350A degrees C is characterized with S type (Al(2)MgCu) phases in the Al-Mg-(Mn)-Cu alloys and with beta'/beta (Mg(5)Al(8)) phases in the Al-Mg-Mn alloys. These structure features are rather unchangeable during the subsequent cold rolling and annealing treatments in the temperature range of 220A degrees A center dot 320A degrees C. During annealing at higher temperatures (such as 470A degrees C) precipitation of Mn-bearing particles (MnAl(6) or (Fe,Mn)Al(6)) might occur in both type of alloys. After solution treatment at 535A degrees C most of the alloying elements are dissolved into solid solution, thus inducing a high potential for precipitation processes during annealing at 220A degrees A center dot 470A degrees C. The cold deformation was found to contribute the electrical resistivity intensively at the beginning of deformation (in the range up to similar to 20%), and it was not influenced by the chemical composition of tested alloys. The resistivity variations with the cold deformation were fitted by power-law equations. PB - Springer/Plenum Publishers, New York T2 - Journal of Nondestructive Evaluation T1 - Precipitation Processes in Al-Mg-(Mn,Cu) Type Alloy Sheets Evaluated Through Electrical Resistivity Variations EP - 48 IS - 1 SP - 43 VL - 29 DO - 10.1007/s10921-010-0064-6 ER -
@article{ author = "Romhanji, Endre and Popović, Miljana and Stanojević, S.", year = "2010", abstract = "Precipitation/dissolution processes were followed by electrical resistivity variations in Al-Mg-(Mn)-Cu and Al-Mg-Mn type alloy sheets after different thermo-mechanical treatments (TMTs). In order to get an insight into the precipitation processes during processing of Al-Mg type alloys, some samples were solution treated at 535A degrees C/1 h, and some of them were recrystallization annealed at 320A degrees A center dot 350A degrees C/3 h. After that all the samples were treated in a same manner: cold rolling to 50-60% and final annealing at temperatures in the range of 220A degrees A center dot 470A degrees C/3 h. It was supposed that the structure of samples pre-treated by recrystallization annealing at 320A degrees/350A degrees C is characterized with S type (Al(2)MgCu) phases in the Al-Mg-(Mn)-Cu alloys and with beta'/beta (Mg(5)Al(8)) phases in the Al-Mg-Mn alloys. These structure features are rather unchangeable during the subsequent cold rolling and annealing treatments in the temperature range of 220A degrees A center dot 320A degrees C. During annealing at higher temperatures (such as 470A degrees C) precipitation of Mn-bearing particles (MnAl(6) or (Fe,Mn)Al(6)) might occur in both type of alloys. After solution treatment at 535A degrees C most of the alloying elements are dissolved into solid solution, thus inducing a high potential for precipitation processes during annealing at 220A degrees A center dot 470A degrees C. The cold deformation was found to contribute the electrical resistivity intensively at the beginning of deformation (in the range up to similar to 20%), and it was not influenced by the chemical composition of tested alloys. The resistivity variations with the cold deformation were fitted by power-law equations.", publisher = "Springer/Plenum Publishers, New York", journal = "Journal of Nondestructive Evaluation", title = "Precipitation Processes in Al-Mg-(Mn,Cu) Type Alloy Sheets Evaluated Through Electrical Resistivity Variations", pages = "48-43", number = "1", volume = "29", doi = "10.1007/s10921-010-0064-6" }
Romhanji, E., Popović, M.,& Stanojević, S.. (2010). Precipitation Processes in Al-Mg-(Mn,Cu) Type Alloy Sheets Evaluated Through Electrical Resistivity Variations. in Journal of Nondestructive Evaluation Springer/Plenum Publishers, New York., 29(1), 43-48. https://doi.org/10.1007/s10921-010-0064-6
Romhanji E, Popović M, Stanojević S. Precipitation Processes in Al-Mg-(Mn,Cu) Type Alloy Sheets Evaluated Through Electrical Resistivity Variations. in Journal of Nondestructive Evaluation. 2010;29(1):43-48. doi:10.1007/s10921-010-0064-6 .
Romhanji, Endre, Popović, Miljana, Stanojević, S., "Precipitation Processes in Al-Mg-(Mn,Cu) Type Alloy Sheets Evaluated Through Electrical Resistivity Variations" in Journal of Nondestructive Evaluation, 29, no. 1 (2010):43-48, https://doi.org/10.1007/s10921-010-0064-6 . .