TITLE

Discrete-element modeling of shock-induced phase transition in iron

AUTHOR(S)
Yano, K.; Horie, Y.
PUB. DATE
April 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 505 Issue 1, p287
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The shock-induced α → ε phase transition in iron has been numerically investigated at the grain level by use of a two dimensional, discrete element model with focus on the metastability and dynamics of the transition. It was found (1) that the transition relaxes to the static metastable surface and (2) that the relaxation time of the transition increases as the wave propagates, and decreases for stronger shock pressure. Also, the calculation showed that the second order kinetics yields the global transition pressure closer to the experimental value than the first order kinetics.
ACCESSION #
5985531

 

Related Articles

  • Lamellar structure and nanomechanical properties of quasicrystalline Al-Cu-Fe alloys. Shalaeva, E.; Chernyshev, Yu.; Smirnova, E.; Smirnov, S. // Physics of the Solid State;Nov2013, Vol. 55 Issue 11, p2205 

    The kinetics of structural phase transformations in quasicrystal-forming Al-Cu-Fe alloys with compositions in the region of stability of the icosahedral ( i) phase has been investigated. It has been shown that, depending on the development of metastable transformations i → pentagonal...

  • Influence of hydrogen sorption on the kinetics of phase decomposition of RFe intermetallic compounds. Vasyl'ev, A. // Materials Science;Mar2012, Vol. 47 Issue 5, p710 

    In real time, we have investigated hydrogen sorption by RFe (R is Dy or Tb) intermetallic compounds and phase decomposition, induced by it, under pressures of 5.4 to 16.2 kPa at temperatures of 450 to 600°C. We have established the influence of specimen dispersity on the rate of phase...

  • Role of Chemical Driving Force in Martensitic Transformations of High-Purity Fe-Cr-Ni Alloys. Behjati, P.; Najafizadeh, A. // Metallurgical & Materials Transactions. Part A;Dec2011, Vol. 42 Issue 12, p3752 

    The main objective of the present work is to point out the respective roles of chemical driving force and stacking fault energy (SFE) in the occurrence of martensitic transformations in high-purity Fe-Cr-Ni alloys. For this purpose, the transmission electron microscope (TEM), X-ray...

  • Size effect in spin-crossover systems investigated by FORC measurements, for surfacted [Fe(NH-trz)](Br)·3HO nanoparticles: reversible contributions and critical size. Rotaru, A.; Varret, F.; Gindulescu, A.; Linares, J.; Stancu, A.; Létard, J.; Forestier, T.; Etrillard, C. // European Physical Journal B -- Condensed Matter;Dec2011, Vol. 84 Issue 3, p439 

    We investigated the thermal transition of coated nano-particles of the title compound, on a set of samples of average diameter ⟨ d⟩ ~ 30, 50, 70, 110 nm, with rather broad size distributions. As expected, the width of the major hysteresis loop was an increasing function of ⟨...

  • On the Mechanism of Laser-Induced Graphite Conversion into Pyrocarbon in a Subsurface Layer of Cast Iron. Kozlov, G. I. // Technical Physics Letters;Sep2001, Vol. 27 Issue 9, p737 

    Based on the original experimental results and on the analysis of published data, the author suggests a consistent variant of the possible mechanism of carbon phase transitions in a subsurface layer of cast iron subjected to a special laser treatment. The phase transitions involve the formation...

  • Kinetics of thin-film reactions of Cu/a-Ge bilayers. Wang, Z.; Ramanath, G.; Allen, L. H.; Rockett, A.; Doyle, J. P.; Svensson, B. G. // Journal of Applied Physics;10/1/1997, Vol. 82 Issue 7, p3281 

    Studies the kinetics of the Cu3Ge phase formation as a function of annealing conditions. Reactions between 600 nm polycrystalline Cu and 600 nm amorphous Ge layers on Si (100) substrates; Resistivity of Cu3Ge at room temperature; Stability of the Cu3Ge/Ge interface.

  • Kinetics of the α-β Phase Transformation in Seeded Si3 N4Ceramics. Bučevac, D.; Bošković, S.; Matović, B. // Science of Sintering;Oct2008, Vol. 40 Issue 3, p263 

    The α-β phase transformation in Si3N4 was studied for seeded samples using an Y2O3-Al2O3 mixture as a sintering aid. The concentration of β-seeds varied from 0 to 5 wt.%. The results showed that α-β phase transformation followed the first-order reaction. The calculated activation...

  • Kinetics of droplet condensation through a double free-energy barrier. Valencia, Antoni // Journal of Chemical Physics;10/14/2006, Vol. 125 Issue 14, p144704 

    Results are presented for the kinetics of nucleation of liquid droplets from a one-component vapor phase on a planar lyophobic substrate patterned with a large number of easily wettable (lyophilic) circular domains. If the wettability of these lyophilic domains is characterized by a contact...

  • Modeling Precipitation Kinetics During Heat Treatment with Calphad-Based Tools. Chen, Qing; Wu, Kaisheng; Sterner, Gustaf; Mason, Paul // Journal of Materials Engineering & Performance;Dec2014, Vol. 23 Issue 12, p4193 

    Sophisticated precipitation reaction models combined with well-developed CALPHAD databases provide an efficient way to tailor precipitate microstructures that maximize strengthening via the optimization of alloy chemistries and heat treatment schedules. The success of the CALPHAD approach relies...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics