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Improvement of shape memory characteristics of Fe-14Mn-6Si-9Cr-5Ni powder metallurgy alloy via mechanical alloying

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

Autori: A. Umut Söyler, Burak Özkal and Leandru G. Bujoreanu

Editorial: Journal of Materials Engineering and Performance, 23(7) , p.2357-2361, 2014.

Rezumat:

In this work, the aim was to investigate how the deformation by cold rolling affects the microstructure and
transformation temperatures of Fe-14Mn-6Si-9Cr-5Ni alloy prepared by powder metallurgy route. The
characteristic of the martensitic transformation in the given alloy composition was investigated in terms of
the amount of deformation via cold rolling. Mechanical alloying was applied for reaching better chemical
homogenization level in powder state and for this purpose the as-blended powder mixture having target
composition was mechanical alloyed for 4 h under protective atmosphere. Compacted samples were sintered
at 1150 C for 2 h under Ar atmosphere. After applying different amounts of cold deformation to the
sintered samples, the changes in microstructure of the shape memory alloys were characterized by x-ray
diffraction and scanning electron microscopy. With increasing amount of cold deformation, shape memory
recovery ratios increased remarkably and e-martensite phase was simultaneously detected during phase
analysis.

Cuvinte cheie: cold rolling, mechanical alloying, powder metallurgy, shape memory characteristics, structural characterization

URL: http://link.springer.com/journal/11665/23/7/page/1