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

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：Liang Xunwen Fu Zhongxue Zhang Shiming Che Yusi Cheng Pengming Wang Pei 梁迅文;付忠学;张石明;车玉思;程鹏明;王沛(河南省科学院碳基复合材料研究院,河南郑州450046;深圳大学增材制造研究所,广东深圳518060;深圳大学机电与控制工程学院,广东深圳518060;郑州大学中原关键金属实验室,河南郑州450001;西安交通大学金属材料强度国家重点实验室,陕西西安710049)

机构地区：[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

出　　处：《稀有金属材料与工程》2025年第3期587-592,共6页Rare Metal Materials and Engineering

基　　金：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)。

摘　　要：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.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。

关 键 词：Mo alloys hot isostatic pressing laser powder bed fusion mechanical properties 

分 类 号：TG146.2[一般工业技术—材料科学与工程]