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TiC/Ti6Al4V functionally graded composite fabricated by in-situ laser additive manufacturing via gas-liquid reaction
Wei, Wenhou1; Zhu, Lei1,2; Wu, Wenjie1; Fan, Shuqian1
2022-04-15
摘要In this study, we proposed a novel method for in-situ additive manufacturing of TiC reinforced Ti6Al4Vmatrix functionally graded composite materials (FGMs) based on gas-liquid reaction. Laser-induced pyrolysis of methane gas (CH4) near the surface of the Ti6Al4V melt pool provides carbon atoms/ions which react with titanium atoms to in-situ synthesize TiC reinforcements. Clean interface and excellent dispersion between the TiC reinforcement and Ti matrix were achieved owing to in-situ gas-liquid reaction, good diffusivity and dispersibility of the gaseous carbon source. As anticipated, spatially varying volume fraction and grain size of the TiC reinforcement, continuously varying microhardness and wear resistance were attained in the TiC/Ti6Al4V FGM by controlling continuous variation of CH4 concentration. (c) 2021 Elsevier B.V. All rights reserved.
关键词Additive manufacturing Functionally graded materials Metal matrix composites Titanium alloys Transmission electron microscopy
DOI10.1016/j.jallcom.2021.163406
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
卷号900页码:10
通讯作者Fan, Shuqian(fansq@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000749698600003
语种英语