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摘要:
In the present study,a series of in situ TiB/Ti6Al4V composites were fabricated using selective laser melting.The formability,microstructure evolution and mechanical properties of the as-built samples added with different contents of TiB2 were studied.It is found that the densification level is related to both the content of TiB2 and laser energy density.The added TiB2 reinforcement particle can spontaneously react with titanium and then form the TiB phase.The needle-like TiB phase tends to transform into dot-like particles with the decrease in energy density.Additionally,with the increase in TiB2 content,the TiB phase is coarsened due to the increased nucleation rate and more reactions.The grain morphology is found to largely depend on the translational speed of solid-fluid interface determined by the temperature gradient and cooling rate.Also,the microhardness of the as-built TiB/Ti6Al4V composites is obviously improved.More interestingly,as the energy density increases,the microhardness of the as-built TiB/Ti6Al4V composites firstly increases and then decreases due to the synergy of grain size and different morphologies and distribution of TiB phases.The wear resistance of TiB/Ti6Al4V composites is far superior to that of Ti6Al4V alloy owing to the increased microhardness resulted from the uniform distribution of the hard TiB phase in the matrix.
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来源期刊 金属学报(英文版) 学科
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年,卷(期) 2020,(6) 所属期刊栏目
研究方向 页码范围 774-788
页数 15页 分类号
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序号 姓名 单位 发文数 被引次数 H指数 G指数
1 Yue Su 1 0 0.0 0.0
2 Shun-Cun Luo 1 0 0.0 0.0
3 Liang Meng 1 0 0.0 0.0
4 Piao Gao 1 0 0.0 0.0
5 Ze-Min Wang 1 0 0.0 0.0
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金属学报(英文版)
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1006-7191
21-1361/TG
16开
沈阳文化路72号
1988
eng
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