An investigation of grain-boundary phase in Fe-30Mn-6Si-5Cr shape memory alloy

作者：Lin HC^*; Lin CS; Lin KM; Chuang YC

来源：Journal of Alloys and Compounds, 2001, 319(1-2): 283-289.

DOI：10.1016/S0925-8388(01)00905-7

• Fe-based shape memory alloy
• grain-boundary phase
• shape memory effect

The formation of the grain-boundary phase in the Fe-30Mn-6Si-5Cr shape memory alloy and how it affected the shape memory effect were investigated. The grain-boundary phase in the Fe-30Mn-6Si-5Cr shape memory alloy formed during annealing at temperatures ranging from 600 to 750 degreesC, especially at 700 degreesC. Conversely, the grain-boundary phase was not observed at annealing temperatures exceeding 800 degreesC or lower than 550 degreesC. The grain-boundary phase exhibited an ordered BCC structure with a lattice parameter of about 8.798 Angstrom, and had a similar chemical composition as that of the matrix. The shape memory effect and tensile property of the Fe-30Mn-6Si-5Cr alloy monotonously degraded with increasing density of the grain-boundary phase.

• 出版日期2001-4-26