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:
Zeitschrift fur Metallkunde, 2005, 96, 12, 1386-1390Колекције
Институција/група
VinčaTY - JOUR AU - Ilić, N. AU - Jovanović, Milan T. AU - Radmilović, Velimir AU - Drobnjak, Đorđe PY - 2005 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2563 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 - Zeitschrift fur Metallkunde T1 - Manifestations of dynamic strain ageing in 2090 Al-Li alloy VL - 96 IS - 12 SP - 1386 EP - 1390 UR - https://hdl.handle.net/21.15107/rcub_vinar_2563 ER -
@article{ author = "Ilić, N. and Jovanović, Milan T. and Radmilović, Velimir and Drobnjak, Đorđe", year = "2005", 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 = "Zeitschrift fur Metallkunde", title = "Manifestations of dynamic strain ageing in 2090 Al-Li alloy", volume = "96", number = "12", pages = "1386-1390", url = "https://hdl.handle.net/21.15107/rcub_vinar_2563" }
Ilić, N., Jovanović, M. T., Radmilović, V.,& Drobnjak, Đ.. (2005). Manifestations of dynamic strain ageing in 2090 Al-Li alloy. in Zeitschrift fur Metallkunde, 96(12), 1386-1390. https://hdl.handle.net/21.15107/rcub_vinar_2563
Ilić N, Jovanović MT, Radmilović V, Drobnjak Đ. Manifestations of dynamic strain ageing in 2090 Al-Li alloy. in Zeitschrift fur Metallkunde. 2005;96(12):1386-1390. https://hdl.handle.net/21.15107/rcub_vinar_2563 .
Ilić, N., Jovanović, Milan T., Radmilović, Velimir, Drobnjak, Đorđe, "Manifestations of dynamic strain ageing in 2090 Al-Li alloy" in Zeitschrift fur Metallkunde, 96, no. 12 (2005):1386-1390, https://hdl.handle.net/21.15107/rcub_vinar_2563 .