THE EFFECT OF CHROMIUM CONTENT ON THE VARIOUS MAGNETIC, ELECTRICAL AND MECHANICAL-PROPERTIES OF FEMNAL ALLOYS

FeMnAl allays with different Cr contents have been investigated with r egard to susceptibility (chi), resistivity (rho), Young's modulus (E), strain sensitivity coefficient of resistance (K) and the stress sensi tivity coefficient of resistance (B). The results show that Cr linearl y reduces the Neel temperature (T-N) and the minimum resistivity tempe rature (T-min), but T-N - T-min for each alloy is practically independ ent of Cr content (21-25 K), Cr increases the Young's modulus below T- min, reduces the modulus softening due to the paramagnetic-antiferroma gnetic transition, and tends to reduce the Young's modulus (E) above T -N. Gr reduces the strain sensitivity coefficient of resistance (K) an d the stress sensitivity coefficient of resistance (B), but it has lit tle influence, on the B anomaly caused by the paramagnetic-antiferroma gnetic transition.