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The effect of rapid solidification and grain size on the transformation temperatures of Ni-44,8wt%Ti melt spun alloy

Published online by Cambridge University Press:  22 February 2012

G. C. S. Anselmo ,
W. B. de Castro  and
C. J. de Araújo
G. C. S. Anselmo
Affiliation:
UAEM, Universidade Federal de Campina Grande, Aprígio Veloso, 882 – Caixa, Posta 10069 - 58429-900 – Campina Grande - PB – [email protected], [email protected]
W. B. de Castro*
Affiliation:
UAEM, Universidade Federal de Campina Grande, Aprígio Veloso, 882 – Caixa, Posta 10069 - 58429-900 – Campina Grande - PB – [email protected], [email protected]
C. J. de Araújo
Affiliation:
UAEM, Universidade Federal de Campina Grande, Aprígio Veloso, 882 – Caixa, Posta 10069 - 58429-900 – Campina Grande - PB – [email protected], [email protected]
*
*Email: [email protected]
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Abstract

Ribbons of the Ni-44.8wt%Ti shape memory alloy are prepared through the melt spinning technique. The study is focused on investigating the effect of the rapid solidification and grain size at characteristic start martensitic (Ms), final martensitic (Mf), start austenite (As) and final austenite (Af) transformation temperatures. Changes on martensitic transformation temperatures in Ti45Ni55 melt spun ribbons are observed as grain size is reduced. Results of optical microscopy and differential scanning calorimetry (DSC) are used to associate grain size with transformation temperatures.

Keywords

KeywordsShape memory Ni-Ti alloyRapid solidificationMartensitic transformation
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1373: Symposium S4 – Advanced Structural Materials—2011 , 2012 , imrc-1373-s4-20
Copyright
Copyright © Materials Research Society 2012

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References

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