Manifestations of dynamic strain ageing in 2090 Al-Li alloy
Апстракт
The manifestations of dynamic strain ageing in a commercial 2090 Al - Li alloy were investigated in a wide range of temperatures (-40 to 100 degrees C) and strain rates (4.16x10(-5) to 4.16x10(-3) s(-1) ). Serrated yielding, as a macroscopic manifestation of dynamic strain ageing, occurs under all testing conditions. Negative strain-rate sensitivity of the flow stress is also observed. Temperature rise and strain rate reduction cause the increase of the yield strength and the work-hardening rate, as well as the decrease of elongation - the behavior being typical for the range in which C-type serrations appear. These phenomena are related to the dislocation substructure, in which features characteristic for solute atoms blocking of dislocations and Orowan bypassing are observed.
Кључне речи:
Dynamic strain ageing / 2090 Al / Li alloy / Serrated yielding / Negative strain rate sensitivity / Dislocation substructureИзвор:
International Journal of Materials Research, 2022, 96, 12, 1386-1390Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Ilic, N. AU - Jovanovic, M. T. AU - Radmilović, Velimir R. AU - Drobnjak, D. PY - 2022 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5020 AB - The manifestations of dynamic strain ageing in a commercial 2090 Al - Li alloy were investigated in a wide range of temperatures (-40 to 100 degrees C) and strain rates (4.16x10(-5) to 4.16x10(-3) s(-1) ). Serrated yielding, as a macroscopic manifestation of dynamic strain ageing, occurs under all testing conditions. Negative strain-rate sensitivity of the flow stress is also observed. Temperature rise and strain rate reduction cause the increase of the yield strength and the work-hardening rate, as well as the decrease of elongation - the behavior being typical for the range in which C-type serrations appear. These phenomena are related to the dislocation substructure, in which features characteristic for solute atoms blocking of dislocations and Orowan bypassing are observed. T2 - International Journal of Materials Research T1 - Manifestations of dynamic strain ageing in 2090 Al-Li alloy EP - 1390 IS - 12 SP - 1386 VL - 96 DO - 10.3139/ijmr-2005-0239 ER -
@article{ author = "Ilic, N. and Jovanovic, M. T. and Radmilović, Velimir R. and Drobnjak, D.", year = "2022", abstract = "The manifestations of dynamic strain ageing in a commercial 2090 Al - Li alloy were investigated in a wide range of temperatures (-40 to 100 degrees C) and strain rates (4.16x10(-5) to 4.16x10(-3) s(-1) ). Serrated yielding, as a macroscopic manifestation of dynamic strain ageing, occurs under all testing conditions. Negative strain-rate sensitivity of the flow stress is also observed. Temperature rise and strain rate reduction cause the increase of the yield strength and the work-hardening rate, as well as the decrease of elongation - the behavior being typical for the range in which C-type serrations appear. These phenomena are related to the dislocation substructure, in which features characteristic for solute atoms blocking of dislocations and Orowan bypassing are observed.", journal = "International Journal of Materials Research", title = "Manifestations of dynamic strain ageing in 2090 Al-Li alloy", pages = "1390-1386", number = "12", volume = "96", doi = "10.3139/ijmr-2005-0239" }
Ilic, N., Jovanovic, M. T., Radmilović, V. R.,& Drobnjak, D.. (2022). Manifestations of dynamic strain ageing in 2090 Al-Li alloy. in International Journal of Materials Research, 96(12), 1386-1390. https://doi.org/10.3139/ijmr-2005-0239
Ilic N, Jovanovic MT, Radmilović VR, Drobnjak D. Manifestations of dynamic strain ageing in 2090 Al-Li alloy. in International Journal of Materials Research. 2022;96(12):1386-1390. doi:10.3139/ijmr-2005-0239 .
Ilic, N., Jovanovic, M. T., Radmilović, Velimir R., Drobnjak, D., "Manifestations of dynamic strain ageing in 2090 Al-Li alloy" in International Journal of Materials Research, 96, no. 12 (2022):1386-1390, https://doi.org/10.3139/ijmr-2005-0239 . .