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6CCVD Research

Microstructure and properties of (diamond + TiC) reinforced Ti6Al4V titanium matrix composites manufactured by directed energy deposition

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2023-12-26
JournalJournal of Materials Research and Technology
AuthorsJiandong Wang, Lang Tang, Yu Xue, Ziang Zhao, Zhijie Ye
InstitutionsYantai University, Harbin Institute of Technology
Citations25

Abstract

Section titled ā€œAbstractā€

In this study, (diamond + TiC) reinforced Ti6Al4V titanium matrix composites (DT-TMCs) were fabricated using the directed energy deposition (DED) technique to enhance multiple properties of the Ti6Al4V alloy. The phase composition, microstructure, microhardness, wear resistance, and thermal conductivity of the composites were investigated. The findings demonstrate that the DT-TMCs consist of diamond, in-situ formed TiC (including eutectic TiC and primary TiC), Ī±-Ti and Ī²-Ti. The formation of in-situ TiC is attributed to the partial dissolution of the diamond into the Ti6Al4V matrix during the DED process. The superior hardness of in-situ TiC, compared to that of Ti6Al4V alloy, plays a pivotal role in enhancing the overall hardness of the DT-TMCs. Owing to the high hardness and excellent thermal conductivity of diamond, the wear resistance and thermal conductivity of the DT-TMCs are superior to those of the unmodified Ti6Al4V alloy. With the diamond volume fraction increasing from 0% to 15%, the microhardness of the DT-TMCs raises from 333.99 HV0.2 to 438.15 HV0.2, the wear rate decreases from 207.514 Ɨ 10āˆ’5 mmĀ³Ā·Nāˆ’1Ā·māˆ’1 to 2.256 Ɨ 10āˆ’5 mmĀ³Ā·Nāˆ’1Ā·māˆ’1, and the thermal conductivity increases from 6.686 WĀ·māˆ’1Ā·Kāˆ’1 to 13.613 WĀ·māˆ’1Ā·Kāˆ’1. Additionally, the in-situ TiC exhibits superior thermal conductivity compared to the Ti6Al4V alloy, which also contributes to the improved thermal conductivity of the DT-TMCs.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2020 - Selective laser manufacturing of Ti-based alloys and composites: impact of process parameters, application trends, and future prospects
  2. 2021 - Selective laser melting of graphene reinforced titanium matrix composites: powder preparation and its formability [Crossref]
  3. 2021 - Effect of heat treatment on the microstructural and mechanical properties of Ti6Al4V-equine bone nanocomposites [Crossref]
  4. 2017 - Microstructure and mechanical properties of functionally graded TiCp/Ti6Al4V composite fabricated by laser melting deposition [Crossref]
  5. 2022 - Study on very high cycle fatigue properties of forged TC4 titanium alloy treated by laser shock peening under three-point bending [Crossref]
  6. 2021 - Multiaxial fatigue damage and reliability assessment of aero-engine compressor blades made of TC4 titanium alloy [Crossref]
  7. 2021 - Progress and perspectives in laser additive manufacturing of key aeroengine materials [Crossref]
  8. 2021 - Investigations of the microstructure and performance of TiCp/Ti6Al4V composites prepared by directed laser deposition [Crossref]
  9. 2018 - Densification, hardness and tribological characteristics of MWCNTs reinforced Ti6Al4V compacts consolidated by spark plasma sintering [Crossref]
  10. 2020 - Combustion behavior and mechanism of Ti14 titanium alloy [Crossref]

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