Fe-26Mn-3Co-2Al-3Si 제진합금의 인장성질에 미치는 미세조직의 영향

Abstract

The tensile properties of Fe-26Mn-3Co-2Al-3Si damping alloy have been investigated for the development of new materials with high strength and damping capacity. The results obtained from this study are as follows : Austenite structure was transformed to the α’ and ε martensite structure by cold working, and α’ and ε martensite was formed with the surface relief and specific direction. phaseation in Fe-26Mn-3Co-2Al-3Si damping alloys have the microstructure that were α’ and ε martensite phase, Increasing the degree of cold rolling, the volume fraction of ε martensite decreased after rising to maximum value at specific level of cold rolling, the volume fraction of α’ martensite slowly increased and then dramatically increased from the point of decreasing ε martensite volume fraction. The tensile strength increased to a straight line relationships and the elongation rapidly decreases in initial stage and than slowly decreased with increasing the degree of cold rolling. Tensile strength and elongation is strongly affected by the content of α΄ martensite, but ε martensite is not, actually exhibit little effect on damping capacity.