摘要： The relationship between the microstructures and the me-chanical properties of solution-treated SP-700 titanium alloys, as obtained with different cooling rates, was investigated. The results indicate that the water-quenched alloy contains the primary a(ap), a”-martensite and residual B(Br) phases. Aging heat treatment can convert both a”-martensite and the Br phases to the fine-grained a + B equilibrium phases, resulting in a significant increase in tensile strength and hardness. Both the air-cooled and furnace-cooled alloys consist of the ap, a and B phases. The air-cooled alloy containing the fine-grained a phase has relatively higher hardness. Aging heat treatment causes only a slight enhancement in tensile properties because it cannot convert the phases in both alloys. Stress-induced martensitic phase transformation occurs in the water-quenched alloy under applied stress, after which the alloy exhibits higher tensile strength, higher ductility, and lower yield strength. 出版者： 台灣: 國立臺灣海洋大學 出版日期： 2016-04-01 出處： Journal of Marine Science and Technology, 2016-04, Vol.24 (2), p.099-106 資源來源： Airiti Library 識別號： ISSN: 1023-2796 識別號： DOI: 10.6119/JMST-015-0409-1
