FE-CR-NI-SI SHAPE MEMORY ALLOY EXCELLENT IN SHAPE MEMORY CHARACTERISTIC, CORROSION RESISTANCE, AND STRESS CORROSION CRACKING RESISTANCE

摘要

PURPOSE:To obtain the alloy suitable for use in a nuclear power field, etc., by specifying the contents of Cr, Si, and Ni, respective total contents of austenite forming elements and ferrite forming elements, and the total content of Cr and Si, respectively. CONSTITUTION:This Fe-Cr-Ni-Si shape memory alloy has a composition which consists of, by weight, 16.0-21.0% Cr, 3.0-7.0% Si, 11.0-21.0% Ni, and the balance Fe and in which Ni=[0.67(Cr+1.2Si)-3] and (Cr+Si)=20 are satisfied. Moreover, 0.1-5.0% Mn, 0.1-1.0% Cu, 0.001-0.100% N, 0.1-3.0% Mo, and 0.1-3.0% W can be further incorporated into the above alloy.