1991 Volume 40 Issue 454 Pages 844-848
With a prospect of wide technical applications, shape memory alloy steel developed recently is attracting large attention because of its excellent machinability and economical merit. In the present study, the strength and the shape memory effect of Fe-9Cr-5Ni-14Mn-6Si were clarified at temperatures from 208K to 423K and at strain rates from 10-4/sec to 4×102/sec. The results obtained are summarized as follows.
(1) Independent of strain rate, a shape recovery ratio of 85 to 98% was obtained at temperatures from 273 to 293K.
(2) The stress increased linearly with the logarithm of strain rate up to about 3% strain level.
(3) The stress rose with temperature in the range of 273K to 370K, while it decreased with temperature outside of this range.