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激光增材制造近β钛合金显微组织与力学性能研究

李海涛 齐敏 陈冬梅 黄森森 王倩 马英杰 雷家峰

李海涛, 齐敏, 陈冬梅, 黄森森, 王倩, 马英杰, 雷家峰. 激光增材制造近β钛合金显微组织与力学性能研究[J]. 材料开发与应用, 2024, 39(1): 30-37.
引用本文: 李海涛, 齐敏, 陈冬梅, 黄森森, 王倩, 马英杰, 雷家峰. 激光增材制造近β钛合金显微组织与力学性能研究[J]. 材料开发与应用, 2024, 39(1): 30-37.
LI Haitao, QI Min, CHEN Dongmei, HUANG Sensen, WANG Qian, MA Yingjie, LEI Jiafeng. Study on Microstructure and Mechanical Properties of Laser Metal Deposition Near β Titanium Alloy[J]. Development and Application of Materials, 2024, 39(1): 30-37.
Citation: LI Haitao, QI Min, CHEN Dongmei, HUANG Sensen, WANG Qian, MA Yingjie, LEI Jiafeng. Study on Microstructure and Mechanical Properties of Laser Metal Deposition Near β Titanium Alloy[J]. Development and Application of Materials, 2024, 39(1): 30-37.

激光增材制造近β钛合金显微组织与力学性能研究

基金项目: 

国家重点研发计划(2021YFC2801801)

详细信息
    作者简介:

    李海涛,男,1978年生,主要从事金属结构材料及应用技术研究。E-mail:leastaony@163.com

    通讯作者:

    马英杰,男,1981年生,主要从事结构钛合金研究。E-mail:yjma@imr.ac.cn

  • 中图分类号: TG146.23

Study on Microstructure and Mechanical Properties of Laser Metal Deposition Near β Titanium Alloy

  • 摘要: 研究了激光沉积打印Ti55511钛合金的显微组织和室温拉伸性能,表征了打印态、热处理态Ti55511合金的晶粒形态及晶体学织构,分析了不同退火热处理温度对激光增材制造钛合金强塑性的影响。结果表明,原始打印态Ti55511钛合金由粗大的β晶粒组成,并且β晶粒以柱状晶和等轴晶两种类型的晶粒交替生长,呈现竹节状形态。在打印态Ti55511组织中,β基体析出的α片层提供了大量的界面,有效阻碍了位错运动,使合金具有高强度和低塑性。580 ℃退火热处理后,合金的屈服强度、抗拉强度变化不明显,伸长率有一定的提升。进一步提高退火温度至620 ℃后,合金的屈服强度、抗拉强度降低,但强度值依然大于1 000 MPa,同时伸长率大幅提升。因此,可通过退火热处理调控α晶粒的尺寸和体积分数,以提高合金的强塑性匹配。当应力平行于Z方向时,样品的屈服强度、抗拉强度略低于垂直于Z方向的,而伸长率显著高于应力垂直于Z方向的。

     

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出版历程
  • 收稿日期:  2023-07-13

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