CAJ | 학술논문

　　利用梯级粉末烧结法成功制备出轻质高阻尼的多孔 TiNiCu 形状记忆合金，并对其组织、相变行为、阻尼性能以及力学性能进行深入研究。研究发现，所制备的多孔TiNiCu合金的表观密度随着Cu含量的增加而降低；在降温和升温过程中，由于多孔 Ti50Ni40Cu10合金基体中相变的滞后和叠加而使其相变温度区间宽化，相变峰弱化；而多孔 Ti50Ni30Cu20合金基体中发生 B2-B19相变而使其具有窄的相变温度区间以及较高的相变峰；多孔Ti50Ni40Cu10合金的形状回复率低于多孔Ti50Ni50合金的，而多孔Ti50Ni30Cu20合金的形状回复率则高于多孔Ti50Ni50合金的。研究还表明，多孔TiNiCu合金的内耗值随着Cu含量的增加而增大，其中多孔Ti50Ni30Cu20合金的一个显著特性是具有很高的等效内耗，其最大等效内耗值是多孔Ti50Ni50合金的5倍。
　　이용제급분말소결법성공제비출경질고조니적다공 TiNiCu 형상기억합금，병대기조직、상변행위、조니성능이급역학성능진행심입연구。연구발현，소제비적다공TiNiCu합금적표관밀도수착Cu함량적증가이강저；재강온화승온과정중，유우다공 Ti50Ni40Cu10합금기체중상변적체후화첩가이사기상변온도구간관화，상변봉약화；이다공 Ti50Ni30Cu20합금기체중발생 B2-B19상변이사기구유착적상변온도구간이급교고적상변봉；다공Ti50Ni40Cu10합금적형상회복솔저우다공Ti50Ni50합금적，이다공Ti50Ni30Cu20합금적형상회복솔칙고우다공Ti50Ni50합금적。연구환표명，다공TiNiCu합금적내모치수착Cu함량적증가이증대，기중다공Ti50Ni30Cu20합금적일개현저특성시구유흔고적등효내모，기최대등효내모치시다공Ti50Ni50합금적5배。
Porous TiNiCu ternary shape memory alloys (SMAs) were successfully fabricated by powder metallurgy method. The microstructure, martensitic transformation behavior, damping performance and mechanical properties of the fabricated alloys were intensively studied. It is found that the apparent density of alloys decreases with increasing the Cu content, the porous Ti50Ni40Cu10 alloy exhibits wide endothermic and exothermic peaks arisen from the hysteresis of martensitic transformations, while the porous Ti50Ni30Cu20 alloy shows much stronger and narrower endothermic and exothermic peaks owing to the B2-B19 transformation taking place easily. Moreover, the porous Ti50Ni40Cu10 alloy shows a lower shape recovery rate than the porous Ti50Ni50 alloy, while the porous Ti50Ni30Cu20 alloy behaves reversely. In addition, the damping capacity (or internal friction, IF) of the porous TiNiCu alloys increases with increasing the Cu content. The porous Ti50Ni30Cu20 alloy has very high equivalent internal friction, with the maximum equivalent internal friction value five times higher than that of the porous Ti50Ni50 alloy.