Understanding modulated twin transition at the atomic level

Download
  1. Get@NRC: Understanding modulated twin transition at the atomic level (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.actamat.2006.10.034
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleActa Materialia
Volume55
Issue5
Pages17311740; # of pages: 10
SubjectMartensitic phase transformation; Shape memory alloys; Twin transition; Twinning
AbstractThe modulated martensitic variants in a Ni-Mn-Ga ferromagnetic shape memory alloy have been characterized in detail by transmission electron microscopy (TEM). Electron diffraction confirms that at room temperature most of the martensite in this alloy exhibits the 5-layer modulated structure. Trace analysis indicates that the self-accommodated variants have a coherent twinning plane of relative to the martensitic phase. One of the twin relations was determined to be with , revealing the presence of a reflection twin. Based on TEM experimental observations, a model describing the reorientation of the twinned variants on an atomic scale was developed to explain the reversible motion of the boundary. The twin transition between the variants with modulated structure is shown to involve deshuffle on the basal plane of the original variant, atomic displacement parallel to the twin boundary and shuffle again on the basal plane of the product variant.
Publication date
AffiliationNational Research Council Canada; NRC Canadian Neutron Beam Centre
Peer reviewedNo
NPARC number12329129
Export citationExport as RIS
Report a correctionReport a correction
Record identifierc9539a1b-c3e1-4c6b-9471-fca484223aa4
Record created2009-09-10
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)