Abstract
The application of mixed powders with different mass fraction on laser additive repairing (LAR) can be an effective way to guarantee the performance and functionality of repaired part in time. A convenient and feasible approach is presented to repair TA15 forgings by employing Ti6Al4V-xTA15 mixed powders in this paper. The performance compatibility of Ti6Al4V-xTA15 powders from the aspects of microhardness, tensile property, heat capacity, thermal expansion coefficient and corrosion resistance with the TA15 forgings was fully investigated. The primary α laths were refined and the volume fraction of the secondary α phase was increased by increasing the mass fraction of TA15 in the mixed Ti6Al4V-xTA15 powders, leading to varied performances. In conclusion, the mixed Ti6Al4V-70%TA15 (x=70%) powders is the most suitable candidate and is recommended as the raw material for LAR of TA15 forgings based on overall consideration of the compatibility calculations of the laser repaired zone with the wrought substrate zone.
摘要
本文提出了一种利用混合粉末修复TA15 锻件的简便可行方法。利用激光增材技术并应用于Ti6Al4V-xTA15 混合粉末,可以有效地保证修复后零件的性能和功能。从显微硬度、拉伸性能、热容、热膨胀系数和耐腐蚀性能等方面研究了Ti6Al4V-xTA15 粉末与TA15 锻件的相容性。结果显示,随着TA15 质量分数的增加,Ti6Al4V-xTA15 粉末细化了初生α 板条,增加了次生α 相的体积分数,导致其性能发生变化。综上所述,综合考虑激光修复区与锻造基板区域的相容性,Ti6Al4V-70%TA15(x=70%)混合粉末是最合适的候选材料,推荐该混合粉末作为TA15 锻件激光增材修复的原材料。
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The overarching research goals were developed by YU Jun, LIN Xin and HUANG Wei-dong. All experiment data were measured by SONG Ye-pan under LIN Xin and YU Jun’s supervision. The initial draft of the manuscript was written by YU Jun and CAO Zhen-jie. YU Jun, CAO Zhen-jie, ZENG Quan-ren and WANG Jun-jie edited the draft of manuscript. All authors replied to reviewers’ comments and revised the final version.
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YU Jun, SONG Ye-pan, LIN Xin, CAO Zhen-jie, ZENG Quan-ren, WANG Jun-jie and HUANG Wei-dong declare that they have no conflict of interest.
Foundation item: Project(2019-00899-1-1) supported by the Ministry of Industry and Information Technology of China; Project(2021JM-060) supported by the Natural Science Foundation of Shaanxi Province, China; Project(3102019QD0409) supported by the Fundamental Research Funds for the Central Universities, China
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Yu, J., Song, Yp., Lin, X. et al. Compatibility research of laser additive repairing TA15 forgings with Ti6Al4V-xTA15 alloy. J. Cent. South Univ. 28, 1015–1027 (2021). https://doi.org/10.1007/s11771-021-4676-z
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DOI: https://doi.org/10.1007/s11771-021-4676-z