Journal
MATERIALS LETTERS
Volume 290, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2021.129449
Keywords
Laser processing; Microstructure; EBSD; Ti6Al4V; TiC
Funding
- National Natural Science Foundation of China [51775521]
- National Defense Foundation of China [61400040208]
- China Postdoctoral Science Foundation [2019M661068]
- Key Research and Development Project of Shanxi Province [201903D121009]
- Natural Science Foundation of Shanxi Province [201801D221154]
- Major Science and Technology Projects of Shanxi Province, China [20181102012]
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The TiC particles in the TiC/Ti6Al4V composite coating strengthen grain boundaries, refine grains, form numerous sub-grain boundaries, and enhance the texture strength of alpha-Ti, resulting in a more ordered arrangement of grains parallel to the Y-0 axis.
TiC/Ti6Al4V composite coating was prepared by laser cladding. The effect of in-situ synthesized TiC on the microstructure evolution of Ti6Al4V was studied. The experimental results show that the average grain size of alpha-Ti in TiC/Ti6Al4V composite coating decreases obviously due to the TiC particles hinder grain growth. The proportion of low-angle grain boundary in TiC/Ti6Al4V composite coating is larger than that in Ti6Al4V coating, especially the similar to 2-5 degrees low-angle grain boundary. TiC particles effectively strengthen grain boundaries and refine grains leading to the formation of a large number of sub-grain boundaries. Moreover, the texture strength of alpha-Ti in TiC/Ti6Al4V composite coating was enhanced. TiC promotes the ordered arrangement of grains in the direction parallel to the Y-0 axis, resulting in texture and increase of grains. (C) 2021 Elsevier B.V. All rights reserved.
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