ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The pseudoelastic behavior of Fe3Al single crystals doped with an extra element (e.g. Ti, V,Cr, Mn, Co, Ni, Si, Ga, Ge) was investigated. In binary Fe-23.0at.%Al crystals with the D03 structure,1/4[111] superpartial dislocations moved independently dragging the nearest-neighbor anti-phaseboundaries (NNAPB) during loading. During unloading, the NNAPB pulled back the superpartialsdecreasing its energy resulting in a giant pseudoelasticity of which the recoverable strain is about 5 %.Addition of a third element significantly affected the pseudoelastic behavior of Fe3Al single crystals.Mn- or Ga-doped crystal demonstrated a giant pseudoelasticity. In particular, Ga-doping was found tobe effective in the enhancement of the pseudoelasticity. On the other hand, the amount of strainrecovery decreased upon doping of the other elements. The frictional stress of the superpartials, theback stress of the NNAPB and ordered domain structure in the crystals changed upon doping, whichwas closely related to the pseudoelastic behavior
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.391.pdf
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