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中南大学学报(英文版)

Journal of Central South University

Vol. 28    No. 4    April 2021

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Compatibility research of laser additive repairing TA15 forgings with Ti6Al4V-xTA15 alloy
YU Jun(于君)1, 2, SONG Ye-pan(宋业盼)1, 2, LIN Xin(林鑫)1, 2, CAO Zhen-jie(曹镇杰)1, ZENG Quan-ren(曾泉人)3, 4, WANG Jun-jie(王俊杰)1, HUANG Wei-dong(黄卫东)1, 2

1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University,
Xi’an 710072, China;
2. Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT, Northwestern Polytechnical University, Xi’an 710072, China;
3. Advanced Forming Research Centre, National Manufacturing Institute, Scotland, 85 Inchinnan Drive, Renfrewshire PA4 9LJ, UK;
4. Department of Design, Manufacture and Engineering Management (DMEM), University of Strathclyde, 75 Montrose Street Glasgow, G1 1XJ, UK

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.

 

Key words: TA15 alloy; Ti6Al4V alloy; laser additive repairing; compatibility

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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