Materials Science & Engineering A, Jan 13, 2014, Vol.592, p.88(7)
To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.msea.2013.10.097 Byline: Takeshi Saito, Cz. Kapusta, Akito Takasaki Abstract: An FeaMnaSi bulk alloy was produced from elemental powders by mechanical alloying (MA) and subsequent sintering. The shape memory effect, microstructure and mechanical property of the bulk alloy were investigated. The [alpha] phase transformed into the [gamma] phase during MA. The MA played an essential role in stabilizing the [gamma] phase, which is associated with the shape memory effect in this alloy system. The [gamma] phase with small amounts of I[micro] and [alpha]' martensitic phases formed after subsequent sintering. After deformation, a [gamma][right arrow]I[micro] stress-induced martensitic phase transformation occurred. Shape recovery was observed after subsequent heating, associated with an I[micro][right arrow][gamma] reverse martensitic transformation. The grain size of the bulk alloy was about 2-3[mu]m, and the yield strength was about 500MPa. These results show that powder metallurgy, a combination of MA and subsequent sintering, has the potential to produce Fe-Mn-Si shape memory alloy. Author Affiliation: (a) Graduate School of Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan (b) Department of Solid State Physics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland (c) Department of Engineering Science and Mechanics, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan Article History: Received 7 July 2013; Revised 29 October 2013; Accepted 31 October 2013
Sintering ; Shape Memory Alloys ; Powders (Particulate matter) ; Metal Products
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