Microstructure and mechanical property of Ti and Ti6Al4V prepared by an in-situ shot peening assisted cold spraying
Microstructure and mechanical property of Ti and Ti6Al4V prepared by an in-situ shot peening assisted cold spraying
复制标题
原位喷丸辅助冷喷涂制备Ti和Ti6Al4V的显微组织和力学性能
DOI：
10.1016/j.matdes.2015.07.015
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发表时间：
2015-11-15
影响因子：
8.4
通讯作者：
Li, Chang-Jiu
中科院分区：
文献类型：
--
作者：
Luo, Xiao-Tao;Wei, Ying-Kang;Li, Chang-Jiu
在本研究中，首次将强喷丸(SP)技术引入到冷喷涂中，将大尺寸不锈钢颗粒与喷涂粉混合在一起，制备出致密的Ti6Al4V(TC4)和工业纯钛(Cp，Ti)。试图通过这些大尺寸SP颗粒的原位锤击，大大提高先前沉积层的塑性变形，从而减少孔隙率。结果表明，当SP颗粒含量从0增加到70%时，CP-Ti和TC4涂层的孔隙率分别从13.7%和15.3%下降到0.3%和0.7%。扫描电子显微镜观察表明，TC4涂层中没有SP颗粒存在。几个SP颗粒(
In the current study, for the first time, an in-sity shot peening (SP) is introduced into cold spray by mixing large sized stainless steel particles with spraying powders to prepare dense Ti6AI4V (TC4) and commercially pure Ti (CP Ti) deposits. It is attempted that via the in-situ hammering by these large sized SP particles, plastic deformation of the previously deposited layers could be greatly enhanced and thereby porosities can be declined. Results show that, as the SP particle proportion increases from 0 to 70 vol.%, porosities of the CP Ti and TC4 coatings decrease from 13.7% and 15.3% to 0.3% and 0.7%, respectively. SEM observations reveal that no SP particle is incorporated into TC4 coatings. A few SP particles (