Ti6Al4V alloy manufactured by electron powder bed fusion(EPBF)was separately heat-treated by stress-relief annealing at 600℃,annealing at 800℃,and solid solution at 920℃ for 1 h.Then,the friction and wear tests wer...Ti6Al4V alloy manufactured by electron powder bed fusion(EPBF)was separately heat-treated by stress-relief annealing at 600℃,annealing at 800℃,and solid solution at 920℃ for 1 h.Then,the friction and wear tests were conducted on the samples before and after heat treatment to analyze the properties and mechanism of friction and wear behavior.Results show that the sample annealed at 600℃ for 1 h has the optimal wear resistance,and the wear mass loss reduces by 44%.The sample annealed at 800℃ for 1 h possesses the optimal anti-friction performance,and the coefficient of friction reduces by 14%.This research provides a simple heat treatment method to improve the friction and wear resistance of Ti6Al4V alloy manufactured by EPBF.展开更多
钛铝基金属间化合物是一种理想的高温结构材料,但因存在室温塑性差、加工困难等不足而限制了其发展与应用。电子束粉末床熔融(Electron Beam Powder Bed Fusion,EB−PBF)技术能够实现近净成形,其加工中的低热应力特点适宜脆性材料的制备...钛铝基金属间化合物是一种理想的高温结构材料,但因存在室温塑性差、加工困难等不足而限制了其发展与应用。电子束粉末床熔融(Electron Beam Powder Bed Fusion,EB−PBF)技术能够实现近净成形,其加工中的低热应力特点适宜脆性材料的制备,是近年来广受关注的新型钛铝基金属间化合物成形方法。对用电子束粉末床熔融制备的钛铝基金属间化合物进行了介绍,并对近年来发表的以EB−PBF钛铝材料为研究对象的相关文献进行了综述。从工艺、后处理和性能表征等角度对目前的研究现状进行了分析总结,并对未来的研究工作提出了展望。展开更多
基金National Natural Science Foundation of China(51975036)Guangdong Province Key R&D Project(2018B090904004)。
文摘Ti6Al4V alloy manufactured by electron powder bed fusion(EPBF)was separately heat-treated by stress-relief annealing at 600℃,annealing at 800℃,and solid solution at 920℃ for 1 h.Then,the friction and wear tests were conducted on the samples before and after heat treatment to analyze the properties and mechanism of friction and wear behavior.Results show that the sample annealed at 600℃ for 1 h has the optimal wear resistance,and the wear mass loss reduces by 44%.The sample annealed at 800℃ for 1 h possesses the optimal anti-friction performance,and the coefficient of friction reduces by 14%.This research provides a simple heat treatment method to improve the friction and wear resistance of Ti6Al4V alloy manufactured by EPBF.
文摘钛铝基金属间化合物是一种理想的高温结构材料,但因存在室温塑性差、加工困难等不足而限制了其发展与应用。电子束粉末床熔融(Electron Beam Powder Bed Fusion,EB−PBF)技术能够实现近净成形,其加工中的低热应力特点适宜脆性材料的制备,是近年来广受关注的新型钛铝基金属间化合物成形方法。对用电子束粉末床熔融制备的钛铝基金属间化合物进行了介绍,并对近年来发表的以EB−PBF钛铝材料为研究对象的相关文献进行了综述。从工艺、后处理和性能表征等角度对目前的研究现状进行了分析总结,并对未来的研究工作提出了展望。
基金the financial supports from the Guangzhou Municipal Science and Technology Project,China(No.202206010030)the Key R&D Program of Guangdong Province,China(No.2019B090904001)。
文摘TiAl金属间化合物因具有低密度、高比强度、优异的高温强度和抗蠕变性能等特点,是迄今为数不多能够在600℃以上氧化环境中长期使用的轻质高温结构材料,可显著提高航空发动机推重比和燃油效率。电子束粉床3D打印(Electron Beam-Powder Bed Fusion,EB−PBF)技术具有高的能量利用率和成形效率,以及成形应力低、真空环境等诸多优势,是脆性TiAl合金最理想的增材制造技术。通过查阅国内外近20 a来EB−PBF打印TiAl合金方面的文献,从粉末原料、组织特点、力学性能、复杂构件成形及应用等方面综述了EB−PBF打印γ−TiAl合金、β凝固TiAl合金、高铌TiAl合金的研究进展,并针对目前面临的关键科学问题及实际应用难题展望了EB−PBF打印TiAl合金的发展前景和重点发展方向。
