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固溶时间对Ti-5553显微组织及拉伸性能的影响
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1.东北大学;2.中国科学院金属研究所

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国家自然科学基金资助(项目号51871225),中国科学院战略性科技先导专项(B类)(XDB06050100)


Effect of Solution Time on Microstructures and Mechanical Properties of Ti-5553
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Affiliation:

1.Northeastern University;2.Institute of Metal Research,Chinese Academy of Sciences

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    摘要:

    本文研究了两相区不同固溶时间对Ti-5553合金显微组织及拉伸性能影响。利用扫描电镜观察显微组织随固溶时间的演化行为,重点分析了初生α相(αp)比例及长宽比分布随固溶时间的变化规律,利用EBSD技术表征了固溶保温阶段晶界α相及晶内α的晶体取向演化,利用电子万能试验机进行了室温拉伸性能测试。研究结果表明:随着固溶时间增加,初生α比例降低,等轴化程度增加,进一步导致了拉伸塑性变形过程中位错运动的阻力及合金强度降低;晶界αp在固溶过程中是以“热切口”的形式发生截断,然而截断部分晶体取向仍保持一致。

    Abstract:

    In this paper, the effects of varied solution time on the microstructures and tensile properties in α+β phase field of Ti-5553 alloy were studied. The volume fraction and feret ratio distribution of primary α (αp) with varied solution time was emphatically analyzed. The microstructures of Ti-5553 alloy were observed by scanning electron microscopy. The orientation evolution of grain boundary primary α and intragranular α phase during solution was characterized by EBSD technique. The tensile properties were tested by the electronic universal testing machine. The results showed that the volume fraction of αp decreases with the extension of solution time, meanwhile, the equiaxation and coarsening of αp would decrease the resistance to dislocation movement, which resulted in the decrease of strength and the increase of plasticity. The grain boundary αp was truncated in the form of "hot trench " during solution process, however the truncated grain boundary αp remained the same orientation.

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张瑞雪,马英杰,黄森森,雷家峰,王平,杨锐.固溶时间对Ti-5553显微组织及拉伸性能的影响[J].稀有金属材料与工程,2020,49(3):985~989.[Zhang Ruixue, Ma Yingjie, Huang Sensen, Lei Jiafeng, Wang Ping, Yang Rui. Effect of Solution Time on Microstructures and Mechanical Properties of Ti-5553[J]. Rare Metal Materials and Engineering,2020,49(3):985~989.]
DOI:10.12442/j. issn.1002-185X.17Ti2019169

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  • 收稿日期:2019-01-29
  • 最后修改日期:2019-10-11
  • 录用日期:2019-10-12
  • 在线发布日期: 2020-04-08
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