| 尹雁飞,赵 彬,贾蔚菊,李思兰,毛成亮,应 扬,毛小南,赵永庆.双重时效对TC29钛合金组织和性能的影响[J].稀有金属材料与工程,2019,48(9):3001~3006.[Yin Yanfei,Zhao Bin,Jia Weijv,Li Silan,Mao Chengliang,Ying Yang,Mao Xiaonan,Zhao Yongqing.Influence of duplex aging on microstructure and mechanical properties of TC29 titanium alloy[J].Rare Metal Materials and Engineering,2019,48(9):3001~3006.] |
| 双重时效对TC29钛合金组织和性能的影响 |
| 投稿时间：2018-11-28??修订日期：2019-04-23 |
| 中文关键词:??近β钛合金??双重时效??次生α相??显微硬度 |
| 基金项目:国家重点研发计划项目(2016YFB0301201)；陕西省重点研发计划项目(2017KW-ZD-08) |
| 中文摘要: |
| ??????采用OM、SEM、TEM等分析方法，结合不同的热处理工艺，系统分析了双重时效处理对含有初生α相TC29钛合金的显微组织的影响。结果表明：经两相区固溶及时效后，TC29钛合金中析出的次生α相尺寸可达到亚微米级。对于895℃固溶处理的TC29钛合金，单重时效后析出的主要是尺寸约100~300nm的弥散α相；双重时效后β转变组织中存在取向近似的 “α丛簇”，“α丛簇”中的次生α相呈细板条状；与单重时效相比，双重时效处理后TC29钛合金的显微硬度并未得到提高，相反存在小幅度的降低；β相基体在预时效过程中析出了大量ω相，同时在靠近初生α/β相界面处由于合金元素扩散导致局部元素分布不均匀，因此随后的二次时效过程中在相应位置形成了“α丛簇”。 |
| Influence of duplex aging on microstructure and mechanical properties of TC29 titanium alloy |
| 英文关键词:near β titanium??duplex aging??secondary α phase??microhardness |
| 英文摘要: |
| ??????In order to find the influence of duplex aging on microstructure and mechanical properties of TC29 titanium alloy accompanied with primary α phase, different heat treatments and analysis methods including OM, SEM, and TEM were adopted. Results show that after treated by α+β two-phase solution and aging secondary α precipitates in TC29 titanium alloy are sub-micron level. After 895℃ solution and single aging, secondary α precipitates are mainly 100~300 nm in length. After 895℃ solution and duplex aging, "α clusters" are observed in β transformed microstructure and secondary α precipitates in them are thin slat-shaped. Compared with single aging, duplex aging results in an equal or lower microhardness. During the pre-aging treatment, a large amount of ω phases precipitate in β matrix, and the local element distribution gradually becomes inconsistent due to the diffusion near the primary α/β phase interface, where the “α cluster” is locally formed during the subsequent aging process. |
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