Abstract
Wire arc additive manufacturing (WAAM) is a novel manufacturing technique by which high strength metal components can be fabricated layer by layer using an electric arc as the heat source and metal wire as feedstock, and offers the potential to produce large dimensional structures at much higher build rate and minimum waste of raw material. In the present work, a cold metal transfer (CMT) based additive manufacturing was carried out and the effect of deposition rate on the microstructure and mechanical properties of WAAM Ti-6Al-4V components was investigated. The microstructure of WAAM components showed similar microstructural morphology in all deposition conditions. When the deposition rate increased from 1.63 to 2.23 kg/h, the ultimate tensile strength (UTS) decreased from 984.6 MPa to 899.2 MPa and the micro-hardness showed a scattered but clear decline trend.
摘要
电弧增材制造(WAAM)是一种新型的制造技术,这项技术可以通过电弧作为热源并以金属丝材作为原料逐层制造高强度金属部件,在大批量生产和生产大尺寸结构零件方面具有巨大的潜力。这项技术还具有高生产效率和高材料利用率的优点。在本工作中,进行了基于冷金属过渡(CMT)的 Ti-6Al-4V 材料的增材制造,研究了沉积速率对电弧增材制造Ti-6Al-4V 零件的显微组织和力学性能的影响。电弧增材制造零件的微观结构在所有沉积条件下均表现出相似的微观结构形态。当沉积速率从 1.6 增加至 2.23 kg/h 时,极限抗拉强度(UTS)从 984.6 MPa 降低至 899.2 MPa,显微硬度显示出分散但明显的下降趋势。
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ZHANG Pei-lei designed the project. JIA Zhi-yuan, TIAN Ying-tao and YAN Hua carried out data processing, performed data analysis. YU Zhi-shui, WU Di and SHI Hai-chuan offered some valuable suggestions for the contents of the manuscript. WANG Fu-xin, LEI Wei-sheng and MA Song-yun offered the specimen, performed data analysis. All authors replied to reviewers’ comments and revised the final version.
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ZHANG Pei-lei, JIA Zhi-yuan, YAN Hua, YU Zhi-shui, WU Di, SHI Hai-chuan, WANG Fu-xin, TIAN Ying-tao, MA Song-yun and LEI Wei-sheng declare that they have no conflict of interest.
Foundation item: Projects(52075317, 51905333) supported by the National Natural Science Foundation of China; Project(IEC\NSFC\181278) supported by the Royal Society through International Exchanges 2018 Cost Share (China) Scheme; Project(19YF1418100) supported by Shanghai Sailing Program, China; Projects(19511106400, 19511106402) supported by Shanghai Science and Technology Committee Innovation, China; Project(19030501300) supported by Shanghai Local Colleges and Universities Capacity Building Special Plan, China
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Zhang, Pl., Jia, Zy., Yan, H. et al. Effect of deposition rate on microstructure and mechanical properties of wire arc additive manufacturing of Ti-6Al-4V components. J. Cent. South Univ. 28, 1100–1110 (2021). https://doi.org/10.1007/s11771-021-4683-0
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DOI: https://doi.org/10.1007/s11771-021-4683-0