Solid-state cold spraying of Ti and its alloys: a literature review

Publication date: Available online 10 December 2019Source: Progress in Materials ScienceAuthor(s): Wenya Li, Congcong Cao, Shuo YinAbstractCompared to conventional high temperature processes, e.g. arc additive manufacturing, thermal spraying and laser/electron-beam cladding/additive manufacturing, coatings of Ti and its alloys with cold spraying (CS) are increasingly attracting attention from researchers and industries, because of the low temperature and high velocity characteristics of sprayed particles, which strictly restrict the oxidation of the sprayed powder and bring about prominent metallurgical benefits. However, coatings of Ti and its alloys by CS have found limited industrial applications compared to other materials (e.g. Cu and Al), partly due to the specific particle deposition behavior of Ti and its alloys and the lack of comprehensive knowledge of its control. This review therefore focuses on the deposition characteristics of Ti and its alloys during CS in an effort to shed light on it and expand its applications. The first part presents a brief introduction of CS and the basic characteristics of Ti and its alloys coatings by CS. The second part describes the effects of CS process parameters on the deposition characteristics of Ti and its alloys. The third part discusses the bonding mechanisms of Ti and its alloys particles during CS. The fourth part discusses in depth the strengthening methods to use like in-situ shot peening and laser-assisted CS. The coating...
Source: Progress in Materials Science - Category: Materials Science Source Type: research