A STUDY OF IMPACT TOUGHNESS OF FE-CR-X DAMPING ALLOYS

A study was carried out on the impact toughness of Fe-Cr-X damping all oys. Two measures proved to be effective in improving impact toughness . One was to lower carbon plus nitrogen content to an ultra-low level. This method is suitable for single-phase ferrite alloy. The other is to use dual-phase damping alloys, The presence of martensite in Fe-Cr- X alloys can enhance impact toughness remarkably, but lower damping ca pacity drastically. This shows the importance of achieving balance bet ween mechanical properties and damping capacity by properly controllin g martensite volume fraction in dual-phase alloys.