Modeling and simulation of strain-induced phase transformations under compression in a diamond anvil cell
نویسندگان
چکیده
Valery I. Levitas1,2,3,* and Oleg M. Zarechnyy2 1Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, USA 2Department of Aerospace Engineering, Iowa State University, Ames, Iowa 50011, USA 3Department of Material Science and Engineering, Iowa State University, Ames, Iowa 50011, USA Received 7 May 2010; revised manuscript received 15 October 2010; published 23 November 2010
منابع مشابه
Coupled plastic flow and phase transformation under compression of materials in a diamond anvil cell: Effects of transformation kinetics and yield strength
The large-strain problem on phase transformations (PTs) under compression in a diamond anvil cell is studied in detail using the finite-element method. The combined effect of transformation kinetics and ratios of the yield strengths of lowand high-pressure phases is examined. Some experimental phenomena (e.g., plateaus in pressure distribution and plasticflow to the center of a sample) are repr...
متن کاملPlastic flows and phase transformations in materials under compression in diamond anvil cell: Effect of contact sliding
Modeling of coupled plastic flows and strain-induced phase transformations (PTs) under high pressure in a diamond anvil cell is performed with the focus on the effect of the contact sliding between sample and anvils. Finite element software ABAQUS is utilized and a combination of Coulomb friction and plastic friction is considered. Results are obtained for PTs to weaker, equal-strength, and str...
متن کاملModeling and simulation of strain-induced phase transformations under compression and torsion in a rotational diamond anvil cell
Strain-induced phase transformations (PTs) under compression and torsion in rotational diamond anvils are simulated using a finite-element approach. Results are obtained for three ratios of yield strengths of lowpressure and high-pressure phases and are compared with those for the compression without torsion from Levitas and Zarechnyy Phys. Rev. B 82 174123 (2010). Various experimental effects ...
متن کاملStrain-induced phase transformations under compression, unloading, and reloading in a diamond anvil cell
Strain-induced phase transformations (PTs) in a sample under compression, unloading, and reloading in a diamond anvil cell are investigated in detail, by applying finite element method. In contrast to previous studies, the kinetic equation includes the pressure range in which both direct and reverse PTs occur simultaneously. Results are compared to the case when “no transformation” region in th...
متن کاملStrain-induced phase transformations under high pressure and large shear in a rotational diamond anvil cell: Simulation of loading, unloading, and reloading
Coupled plastic flow and strain-induced phase transformations (PTs) under high pressure and large plastic shear in a micron scale sample under loading, unloading, and reloading in a rotational diamond anvil cell (RDAC) are studied in detail, utilizing finite element approach. A plastic strain-controlled, pressuredependent kinetic equation, which describes strain-induced PTs, is used. The effect...
متن کامل