96 research outputs found
EFFECT OF STRAIN RATE ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF TWIP-STEELS
ΠΠ·ΡΡΠ΅Π½Ρ ΠΌΠΈΠΊΡΠΎΡΡΡΡΠΊΡΡΡΠ° ΠΈ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° Π²ΡΡΠΎΠΊΠΎΠΌΠ°ΡΠ³Π°Π½ΡΠ΅Π²ΡΡ
Π°ΡΡΡΠ΅Π½ΠΈΡΠ½ΡΡ
ΡΡΠ°Π»Π΅ΠΉ Feβ17.5Mnβ0.3Cβ1.5Al ΠΈ Feβ18Mnβ0.4C ΠΏΡΠΈ ΡΠ°ΡΡΡΠΆΠ΅Π½ΠΈΠΈ Π² ΠΈΠ½ΡΠ΅ΡΠ²Π°Π»Π΅ ΡΠΊΠΎΡΠΎΡΡΠ΅ΠΉ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ 10-5β10-1 Ρ-1. ΠΡΠ»ΠΎ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ ΡΠΊΠΎΡΠΎΡΡΠΈ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΠΎΡ 10-5 Ρ-1 Π΄ΠΎ 10-1 Ρ-1 ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ ΠΏΡΠ΅Π΄Π΅Π»Π° ΡΠ΅ΠΊΡΡΠ΅ΡΡΠΈ ΠΈ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΡ ΠΏΡΠ΅Π΄Π΅Π»Π° ΠΏΡΠΎΡΠ½ΠΎΡΡΠΈ ΠΈ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ΄Π»ΠΈΠ½Π΅Π½ΠΈΡ Π² ΠΎΠ±Π΅ΠΈΡ
ΡΡΠ°Π»ΡΡ
. Π ΠΌΠΈΠΊΡΠΎΡΡΡΡΠΊΡΡΡΠ΅ ΠΎΠ±Π΅ΠΈΡ
ΡΡΠ°Π»Π΅ΠΉ ΠΏΡΠΈ ΠΌΠ°Π»ΡΡ
ΡΠΊΠΎΡΠΎΡΡΡΡ
Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ (10-5 Ρ-1) ΠΏΡΠΎΡΠ΅ΡΡ Π΄Π²ΠΎΠΉΠ½ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΎΡΠ΅ΠΊΠ°Π΅Ρ ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎ Ρ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ Π΄Π²ΠΎΠΉΠ½ΠΈΠΊΠΎΠ² ΡΠ½Π°ΡΠ°Π»Π° ΠΎΠ΄Π½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ Π΄Π²ΠΎΠΉΠ½ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ, Π·Π°ΡΠ΅ΠΌ Π΄ΡΡΠ³ΠΈΡ
. ΠΠ°Π»ΡΠ½Π΅ΠΉΡΠ΅Π΅ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ ΡΠΊΠΎΡΠΎΡΡΠΈ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΠΎΠ΄Π½ΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΌΡ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ Π΄Π²ΠΎΠΉΠ½ΠΈΠΊΠΎΠ² ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΡΠΈΡΡΠ΅ΠΌ Π΄Π²ΠΎΠΉΠ½ΠΈΠΊΠΎΠ²Π°Π½ΠΈΡ, ΡΠ°Π·Π±ΠΈΠ²Π°ΡΡΠΈΡ
ΠΌΠΈΠΊΡΠΎΡΡΡΡΠΊΡΡΡΡ Π½Π° ΠΎΡΠ΄Π΅Π»ΡΠ½ΡΠ΅ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΈΡΡ Π² ΡΠΎΡΠΌΠ΅ ΠΏΠ°ΡΠ°Π»Π»Π΅Π»ΠΎΠ³ΡΠ°ΠΌΠΌΠΎΠ².The microstructure and mechanical properties of high-manganese austenitic steels Feβ17.5Mnβ0.3Cβ1.5Al and Feβ18Mnβ0.4C in the strain rate range of 10-5β10-1 s-1 were studied. It was found that an increase in the strain rate from 10-5 s-1 to 10-1 s-1 leads to an increase in the yield strength and a decrease in the tensile strength and elongation in both steels. The microstructure evolution of both steels at low strain rates (10-5 s-1) can be described as sequential formation of twins of different twinning systems. A further increase in the tensile strain rate leads to the simultaneous formation of twins of various twinning systems that separates the microstructure into individual parallelogram-like crystallites.Π Π°Π±ΠΎΡΠ° Π²ΡΠΏΠΎΠ»Π½Π΅Π½Π° ΠΏΡΠΈ ΡΠΈΠ½Π°Π½ΡΠΎΠ²ΠΎΠΉ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠ΅ ΠΠΈΠ½ΠΎΠ±ΡΠ½Π°ΡΠΊΠΈ Π ΠΎΡΡΠΈΠΈ (Π‘ΠΎΠ³Π»Π°ΡΠ΅Π½ΠΈΠ΅ β 14.575.21.0134 Π£Π½ΠΈΠΊΠ°Π»ΡΠ½ΡΠΉ ΠΈΠ΄Π΅Π½ΡΠΈΡΠΈΠΊΠ°ΡΠΎΡ ΠΏΡΠΎΠ΅ΠΊΡΠ° RFMEFI57517X0134)
A Search for Pulsating, Mass-Accreting Components in Algol-Type Eclipsing Binaries
We present a status report on the search for pulsations in primary componants of Algols systems (oEA stars). Analysis of 21 systems with A0-F2 spectral type primaries revealed pulsations in two systems suggesting that of the order of ten persent of Algols primaries in this range are actually pulsators
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