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Effects of hot working procedure on surface relief characteristic in an Fe–Mn–Si–Cr shape memory alloy

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Marius-Gabriel SURU, I. Dan, N. M. Lohan, A. L. Paraschiv, B. Pricop, I. P. Spiridon, C. Baciu, L.-G. Bujoreanu

Editorial: Materialwissenschaft und Werkstofftechnik , Vol. 45, No. 1, p.44–50, 2014.

Rezumat:

The paper reports the evolution of surface relief and shape memory behavior in an Fe–28Mn–
6Si–5Cr (mass%) shape memory alloy (SMA) as a function of the applied hot working procedure.
The objective of this paper is to discuss the relationship between surface relief characteristic,
structural changes and the type of hot working processing. Particular aspects concerning the
relief of martensite plates were reported after the alloy was subjected to two types of hot working
procedures, namely hot rolling and hot forging at 1273 K. The observations were performed by
means of optical (OM) and atomic force (AFM) microscopy, on bi-dimensional and three-dimensional
micrographs, corroborated with statistical evaluations. Aiming to reveal the presence of
solid phase transitions enabled by hot working, differential scanning calorimetry (DSC) measurements
were performed between room temperature and 673 K.

Cuvinte cheie: shape memory alloy / surface relief / hot working / atomic force microscopy / differential scanning calorimetry / phase transition

URL: http://onlinelibrary.wiley.com/doi/10.1002/mawe.201400190/abstract