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所属单位：材料科学与技术学院

发表刊物：Vacuum

摘要：Trace boron-modified Ti6Al4V walls were prepared by electron beam freeform fabrication (EBF3), and the role of beam power in the distribution statues of aligned TiB whiskers (TiBw) and tensile behavior was investigated. The results show that the studied beam power has a remarkable effect on the interval, number density and size of aligned TiBw, while the orientation remains unchanged. High-density and fine TiBw are achievable at a decreased beam power, and play a great role in the increment in strength. With an increase in the beam power, the interval between the aligned TiBw enlarges. It allows the vertical direction to tolerate a large amount of elongation before failure by reducing the crack-propagation rate, blunting and deflecting the cracks. Due to the presence of highly orientated TiBw, the transverse direction of all deposits suffers from a premature failure. This study provides a new route to obtain a desirable mechanical performance by tailoring the distribution statues of TiBw during additive manufacturing of such materials. © 2019 Elsevier Ltd

ISSN号：0042-207X

是否译文：否

发表时间：2020-02-01

合写作者：Tao, Xuewei,张莎莎,Yao, Mengxin,Sun, Shihao,Oleksandr, Moliar

通讯作者：姚正军