Open AccessВлияние высокотемпературного отжига на сопротивление высокоскоростному деформированию и разрушению тантала при температуре 20 и 500-=SUP=-o-=/SUP=-C
Author(s) -
Г.В. Гаркушин,
А.С. Савиных,
С. В. Разоренов,
G. I. Kanel
Publication year - 2019
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/jtf.2019.05.47475.253-18
Subject(s) - spall , tantalum , materials science , shock wave , spallation , rarefaction (ecology) , shock (circulatory) , strain rate , fracture (geology) , compression (physics) , composite material , mechanics , metallurgy , physics , nuclear physics , medicine , geology , paleontology , species richness , neutron
Two series of shock-wave experiments have been conducted in order to measure the Hugoniot elastic limit and determine the strain rate dependence of critical fracture stress for tantalum experiencing spall fracture. Tantalum specimens have been preannealed in vacuum at 1000°C. The evolution of elastoplastic compression shock waves at room and elevated up to 500°C temperatures has been presented from complete wave profiles recorded by a VISAR laser Doppler velocimeter. The spall strength dependence on the strain rate during the expansion of the material in a rarefaction wave has been determined.