연속주조법으로 제조된 Cu-9Ni-6Sn 합금의 열처리 조건 및 냉간 swaging 량에 따른 기계적 특성의 변화 = Mechanical Behavior;Effects of Heat Treatment Conditions and Amount of Cold Swaging on Mechanical Properties of Continuously Cast Cu-9Ni-6Sn Alloys

다국어 초록 (Multilingual Abstract)

In the present study, tensile properties of continuously cast and swaged Cu-9Ni-6Sn alloys were examined. Solutionized and aged Cu-9Ni-6Sn alloys, with 95% swaging, showed a multi-stage change in tensile strength with aging time, probably due to the sequential occurrence of spinodal decomposition, formation of γ' and recrystallization. The change in tensile strength with aging time for the aged specimens without solution heat treatment was, on the other hand, minimal. A complex interaction between the decrease in dislocation density, formation of equilibrium phases and refinement of Sn-rich phases is believed to be responsible for such a lean sensitivity. Spinodal decomposition in Cu-Ni-Sn alloys appears to be restricted with increasing the amount of cold deformation.