Damping Capacity and Pitting Corrosion Resistance of Fe–Mo–Cr Alloys

Hakaru Masumoto, Masakatsu Hinai, Showhachi Sawaya
1984 Transactions of the Japan Institute of Metals  
The damping characteristic and anodic polarization behavior in a 3 mass%NaCl solution were studied on Fe-Mo-Cr alloys containing Mo less than 16 mass% and less than 35 mass%Cr after various heat treatments. Measurement of the internal friction Q-' was carried out by the inverted torsion penusing an Instron-type testing machine and a potentiostat, respectively. In the case of furnace-cooling, the value of Q-1 is very high in Fe-Mo-Cr alloys with small amounts of molybdenum and chromium and is
more » ... chromium and is low in the alloys with large amounts of molybdenum and chromium. The low value of Q-1 in the latter is due to the fact that intermetallic compounds are precipitated in the ferromagnetic (Fe, Mo, Cr) solid solution. On the other hand, most of alloys subjected to water-quenching are fairly high in Q-1 because of the single phase (Fe, Mo, Cr) solid solution. The furnace-cooled alloys are generally low in Ep (pitting potential), while many of the alloys become considerably higher in Ep by water-quenching giving rise to a high Q-1 value.
doi:10.2320/matertrans1960.25.891 fatcat:fplakhbi25bepiqr7i2segirgy