Influence of Carbon Addition to Fe-Mn-Si Type Alloy on the Structure and Shape Memory Effect

Witold Prendota, Kamil Goc, Shunsuke Miyazawa, Akito Takasaki, Damian Rybicki, Czeslaw Kapusta
2018 Advances in Materials Science and Engineering  
The study presented is focused on the influence of carbon addition on properties of the Fe-Mn-Si type intelligent materials with basic composition of Fe64Mn30Si6 (wt. %). Three alloys were prepared, starting from elemental powders, with 0, 0.1, and 0.3 wt. % of carbon, at corresponding silicon content reduction. For the synthesis, the mechanical alloying, sintering, and annealing were applied. Further process involved deformation and subsequent heating in a furnace. High temperature X-ray
more » ... erature X-ray diffraction patterns, obtained at room temperature and up to 600°C, showed evolution of α′, γ, and ε phase peaks. The study revealed that a small carbon addition (of 0.1 wt. %), could increase shape recovery stress, even up to 1.8% after one cycle of training. The higher carbon content leads to a deterioration of the property. Also, relative density differences are observed between the sintered Fe64Mn30Si6 (wt. %) alloys with before/after annealing with/without mechanical alloying involvement.
doi:10.1155/2018/6950876 fatcat:rjx3eru7xne2rfbsrowpcpsfyu