Document Detail

Effect of shear strain on the α-ε phase transition of iron: a new approach in the rotational diamond anvil cell.
MedLine Citation:
PMID:  22611098     Owner:  NLM     Status:  In-Data-Review    
The effect of shear strain on the iron α-ε phase transformation has been studied using a rotational diamond anvil cell (RDAC). The initial transition is observed to take place at the reduced pressure of 10.8 GPa under pressure and shear operation. Complete phase transformation was observed at 15.4 GPa. The rotation of an anvil causes limited pressure elevation and makes the pressure distribution symmetric in the sample chamber before the phase transition. However, it causes a significant pressure increase at the centre of the sample and brings about a large pressure gradient during the phase transformation. The resistance to the phase interface motion is enhanced due to strain hardening during the pressure and shear operations on iron and this further increases the transition pressure. The work of macroscopic shear stress and the work of the pressure and shear stress at the defect tips account for the pressure reduction of the iron phase transition.
Yanzhang Ma; Emre Selvi; Valery I Levitas; Javad Hashemi
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Publication Detail:
Type:  Journal Article     Date:  2006-06-09
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  18     ISSN:  0953-8984     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2006 Jun 
Date Detail:
Created Date:  2012-05-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  England    
Other Details:
Languages:  eng     Pagination:  S1075-82     Citation Subset:  -    
Department of Mechanical Engineering and Center for Mechanochemistry and Synthesis of New Materials, Texas Tech University, Lubbock, TX 79409, USA.
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