A novel magnetic field assisted powder arc additive manufacturing for Ti60 titanium alloy: Method, microstructure and mechanical properties
参考中译:Ti60钛合金的新型磁场辅助粉末弧增材制造：方法、显微组织和力学性能


          

刊名：Additive Manufacturing
作者：Kexin Kang（State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology）
Yibo Liu（State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology）
Huisheng Ren（State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology）
Qinghua Zhang（State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology）
Shiqing Wang（Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai）
Yina Kong（Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai）
Wenyuan Li（Institute of Metal Research, Chinese Academy of Sciences）
Jianrong Liu（Institute of Metal Research, Chinese Academy of Sciences）
Qingjie Sun（State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology）
刊号：780C0044/I
ISSN：2214-8604
出版年：2024
年卷期：2024, vol.83
页码：104065-1--104065-15
总页数：15
分类号：TH16
关键词：Magnetic field assisted powder arc additive；Manufacturing；Powder spattering problem；Powder melting behavior；Ti60 high-temperature titanium alloy；Microstructure；Mechanical properties
参考中译：磁场辅助粉末弧添加剂;制造;粉末飞溅问题;粉末熔化行为; Ti60高温钛合金;显微组织;机械性能
语种：eng
文摘：Due to the rapid heating-cooling process and unstable keyhole, pore defects are easily formed during the high energy beam-powder additive manufacturing (AM) process, posing great challenges to the high-performance manufacturing of aerospace components. Using an arc with lower energy density as a heat source can effectively avoid these defects, but its matching raw materials are limited to wire. In this paper, a novel magnetic field assisted powder arc additive manufacturing (MFA-PAAM) method has been proposed, which combines arc heat source and powder raw material to achieve dense metal parts. A transverse magnetic field (TMF) was introduced to solve the powder spattering problem which impacts the stability of the PAAM process, by regulating the direction of the arc plasma flow and the arc pressure. The unique melting behavior of the powder under arc heating was captured by a high-speed camera, which can be summarized into two steps: balling and adsorption by the molten pool. And the well-formed and fully dense Ti60 high-temperature titanium alloy wall components were successfully manufactured using the self-developed equipment. The microstructure of the thin-wall component is dominated by basket-weave distributed α laths and few β sheets remaining at their boundaries. A layered periodic distribution along the building direction was observed, which is mainly distinguished from the content and morphology of the β phase. The average ultimate tensile strength (UTS) and elongation to failure in the travelling direction are 1003.2 MPa and 15.1%, while the average UTS and elongation along the building direction are 1009.3 MPa and 16.6%, respectively. The fracture morphologies in both directions are characterized by ductile fracture. The MFA-PAAM technique shows great potential for fabricating materials that are difficult to be drawn into wires with high efficiency and performance.
参考中译：高能束流-粉末添加剂制造(AM)过程中，由于加热冷却速度快，小孔不稳定，容易形成气孔缺陷，给航空零部件的高性能制造带来了巨大的挑战。采用能量密度较低的电弧作为热源可以有效地避免这些缺陷，但其匹配的原材料仅限于线材。本文提出了一种新型的磁场辅助粉末电弧添加剂制造方法(MFA-PAAM)，该方法将电弧热源和粉末原料相结合，以获得致密的金属零件。为了解决影响PAAM工艺稳定性的粉末飞溅问题，引入横向磁场(TMF)，通过调节电弧等离子体流动方向和电弧压力来解决粉末飞溅问题。用高速摄像机捕捉到了粉末在电弧加热下独特的熔化行为，其过程可概括为两个步骤：成球和熔池吸附。并利用自行研制的设备成功地制造出了成形良好、致密的Ti60高温钛合金壁件。薄壁构件的显微组织主要为篮状分布的α板条和少量残留在其边界的β片材。观察到了沿构筑方向的层状周期性分布，这主要与β相的含量和形貌不同。沿行进方向的平均极限抗拉强度和断裂延伸率分别为1003.2 Mpa和15.1%，而沿建筑方向的平均极限抗拉强度和延伸率分别为1009.3 Mpa和16.6%。两个方向的断裂形态均以韧性断裂为特征。MFA-PAAM技术在制造高效率和高性能的难以拉伸成线的材料方面显示出巨大的潜力。



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