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热等静压处理提升激光粉末床熔融成形钼合金的力学性能
作者:
作者单位:

1.河南省科学院 碳基复合材料研究院,河南 郑州 450046;2.深圳大学 增材制造研究所,广东 深圳 518060;3.深圳大学 机电与控制工程学院,广东 深圳 518060;4.郑州大学 中原关键金属实验室,河南 郑州 450001;5.西安交通大学 金属材料强度国家重点实验室,陕西 西安 710049

基金项目:

the National Natural Science Foundation of China (No. 52105385, and 52274357), the Stable Support Plan Program of Shenzhen Natural Science Fund (No. 20220810132537001), Guangdong Basic and Applied Basic Research Foundation: (No. 2022A1515010781)


Hot Isostatic Pressing for Enhancing Mechanical Properties of Mo Alloys Prepared by Laser Powder Bed Fusion
Author:
Affiliation:

1.Institute of Carbon Matrix Composites, Henan Academy of Sciences, Zhengzhou 450046, China;2.Additive Manufacturing Institute, Shenzhen University, Shenzhen 518060, China;3.College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China;4.Zhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou 450001, China;5.State Key Laboratory for Mechanical Behavior of Materials, Xi 'an Jiaotong University, Xi'an 710049, China

Fund Project:

National Natural Science Foundation of China (52105385); Stable Support Plan Program of Shenzhen Natural Science Fund (20220810132537001); Guangdong Basic and Applied Basic Research Foundation (2022A1515010781); Joint Fund of Henan Province Science and Technology R&D Program (225200810002); Fundamental Research Funds of Henan Academy of Sciences (240621041)

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    摘要:

    为了提升激光粉末床熔融(LPBF)技术所制备的钼(Mo)合金的力学性能,采用了热等静压技术对其处理。热等静压处理后,LPBF Mo合金的孔隙率从0.27%降低至0.22%,Mo和Ti元素得到充分扩散并且分布地更加均匀,同时形成了大量低角度晶界,抗拉伸强度从286±32 MPa升高至598±22 MPa,伸长率由0.08%±0.02%提高至0.18%±0.02%,在拉伸过程中晶粒没有明显变化。热等静压处理消除了LPBF Mo合金的熔池边界,而熔池边界是LPBF Mo合金提前失效的主要原因。因此,热等静压处理成为了一种有效的强化LPBF Mo合金力学性能的方法,为制造高性能钼基合金提供了新思路。

    Abstract:

    To enhance the mechanical properties of Mo alloys prepared through laser powder bed fusion (LPBF), a hot isostatic pressing (HIP) treatment was used. Results show that following HIP treatment, the porosity decreases from 0.27% to 0.22%, enabling the elements Mo and Ti to diffuse fully and to distribute more uniformly, and to forming a substantial number of low-angle grain boundaries. The tensile strength soars from 286±32 MPa to 598±22 MPa, while the elongation increases from 0.08%±0.02% to 0.18%±0.02%, without notable alterations in grain morphology during the tensile deformation. HIP treatment eliminates the molten pool boundaries, which are the primary source for premature failure in LPBFed Mo alloys. Consequently, HIP treatment emerges as a novel and effective approach for strengthening the mechanical properties of LPBFed Mo alloys, offering a fresh perspective on producing high-performance Mo-based alloys.

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梁迅文,付忠学,张石明,车玉思,程鹏明,王沛.热等静压处理提升激光粉末床熔融成形钼合金的力学性能[J].稀有金属材料与工程,2025,54(3):587~592.[Liang Xunwen, Fu Zhongxue, Zhang Shiming, Che Yusi, Cheng Pengming, Wang Pei. Hot Isostatic Pressing for Enhancing Mechanical Properties of Mo Alloys Prepared by Laser Powder Bed Fusion[J]. Rare Metal Materials and Engineering,2025,54(3):587~592.]
DOI:10.12442/j. issn.1002-185X.20240583

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  • 收稿日期:2024-09-04
  • 最后修改日期:2024-12-09
  • 录用日期:2024-12-10
  • 在线发布日期: 2025-03-25
  • 出版日期: 2025-03-25