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B和Y复合添加对近α钛合金组织性能的影响
作者:
作者单位:

1.太原理工大学;2.哈尔滨工业大学 金属精密热加工国家级重点实验室

基金项目:

国家自然科学基金 (51504163,51604191)；北京科技大学新金属材料国家重点实验室基金(2014-ZD06)


Effect of B and Y Mixed Addition on Microstructure and Compressive Properties of Near α Titanium Alloy
Author:
Affiliation:

1.Taiyuan University of Technology;2.National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of Technology

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    摘要:

    研究了少量B和Y的添加对一种新型近α高温钛合金的显微组织和力学性能的影响。对含B和Y铸态合金的凝固路径和初生β晶粒和α板条的细化机理进行了分析和研究。结果表明：B和Y的添加对铸态合金的显微特征有显著影响，添加B和Y后，基体合金的显微组织明显细化。基体合金的力学性能发生了显著变化，极限压缩强度和屈服强度也随B和Y的添加而逐渐增大，这主要是由于B和Y的添加造成的晶粒细化。合金的压缩塑性和断裂韧性随B和Y的添加逐渐降低，主要是TiB在受载荷时先断裂以及Y2O3从基体中拨出从而加速了裂纹的扩展造成的。

    Abstract:

    Abstract: The effects of the co-addition of B and Y on the microstructure and mechanical properties of a novel near α high temperature titanium alloy were studied. The solidification paths and the refinement mechanism of the titanium alloys with different B and Y additions were analyzed and studied. The results show that the addition of B and Y has a significant effect on the refinement of grain size of the Titanium alloys. The ultimate compressive strength and yield strength increase with the addition of B and Y, mainly due to the grain refinement caused by the addition of B and Y. The compressive plasticity and fracture toughness of the alloys decrease gradually with the addition of B and Y, which is attributed to the fractured TiB together with Y2O3 pulled out the matrix, accelerating the expansion of the crack.

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引用本文

吴介,郭冲霄,张长江,张树志,韩建超,林鹏,陈玉勇. B和Y复合添加对近α钛合金组织性能的影响[J].稀有金属材料与工程,2018,47(11):3487~3492.[Wujie, Guo Chongxiao, Zhang Changjiang, Zhang Shuzhi, Han Jianchao, Lin Peng, Chen Yuyong. Effect of B and Y Mixed Addition on Microstructure and Compressive Properties of Near α Titanium Alloy[J]. Rare Metal Materials and Engineering,2018,47(11):3487~3492.]
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  • 收稿日期:2017-08-22
  • 最后修改日期:2018-10-18
  • 录用日期:2017-11-01
  • 在线发布日期: 2018-12-19

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