Impact response of a tungsten heavy alloy over 23-1100 °c temperature range

E. B. Zaretsky, N. Frage, B. Ratzker, S. Kalabukhov, M. Mayseless

Research output: Contribution to journalArticlepeer-review

Abstract

Impact response of a tungsten heavy alloy (WHA) prepared by liquid phase sintering of tungsten powder (∼80 vol. %) with an Ni-Co-Fe (3.50-1.25-1.0 weight ratio) binder was studied over a 23-1100 °C temperature range in a series of planar impact tests accompanied by continuous monitoring of the velocity of the WHA sample rear surface. The temperature dependence of the proof stress Y 0.1 (T) was found based on the 1D numerical simulations of the performed impact tests using a modified Steinberg-Cohran-Guinan constitutive model, and the temperature dependencies of the density ρ 0 (T) and longitudinal c l (T) and bulk c b (T) speeds of sound were found using rule of mixtures. The bulk speed of sound c b (T) was also used in determination of the temperature dependence of the spall strength σ s p (T) of the alloy based on the experimentally recorded velocity pull-backs Δ u p b. The strong decrease of both Y 0.1 (T) and σ s p (T) with temperature (Y 0.1 decreases almost sixfold between 23 and 1100 °C) allows one to assume that the tensile (spall) fracture of the alloy is controlled by the strength of its matrix.

Original languageEnglish
Article number125902
JournalJournal of Applied Physics
Volume129
Issue number12
DOIs
StatePublished - 28 Mar 2021

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