摘要
采用XRD,SEM和TEM研究了TC16钛合金在700—900℃固溶后淬火的显微组织和相组成,以及淬火温度对拉伸性能的影响.结果表明,在700和750℃淬火,TC16钛合金由初生α相、亚稳β相和微量ω相组成;随着淬火温度的升高,合金出现了β→α″的马氏体相变;从β单相区淬火,合金由α″马氏体组成.拉伸实验表明,拉伸过程中亚隐组织试样出现应力诱发α″马氏体相转变,导致屈服强度降低.
The evolution of microstructure and phase transformation in TC16 titanium alloy after solution and then quenching from 700℃ to 900℃ were investigated by XRD, SEM and TEM, and the corresponding tensile properties were also measured. The results reveal that TC16 titanium alloy consists of primary α phase, metastable β phase and small amount of δ phase when quenching at 700 and 750℃. With quenching temperature increasing, the phase transformation of β→α″ happens. The alloy is completely composed of α″ martensite when quenching from single β phase field. Tensile test shows the yield strength of metastable microstructure samples is lowered due to stress induced α″ martensitic transformation. KEY WORDS TC16 titanium alloy, microstructure, phase structure, stress induced martensite
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第10期1257-1262,共6页
Acta Metallurgica Sinica
关键词
TC16钛合金
显微组织
相结构
应力诱发马氏体
TC16 titanium alloy, microstructure, phase structure, stress induced martensite
