Quantitative analysis on the surface topography of Ti-6Al-4V machined by abrasive suspension jet
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ORIGINAL ARTICLE
Quantitative analysis on the surface topography of Ti-6Al-4V machined by abrasive suspension jet Wang Fengchao 1 & Yang Kaining 1 & Xiao Nanzhe 1 & Li Liucan 1 & Guo Chuwen 1 Received: 5 July 2020 / Accepted: 9 November 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract Surface topography is the intrinsic determinant of the roughness that is a significant evaluation standard for the machining quality of the abrasive suspension jet (ASJ). To achieve quantitative analysis on the surface topography machined by ASJ, this paper measured the roughness and the scratch size of the cutting surface with an ultra-deep three-dimensional microscope. Ti-6Al-4V (TC4), a typical hard machining material widely used in aviation industry, was chosen as the cutting target. From a macroperspective, the cutting surface is divided into four zones from top to bottom including the initial zone, the smooth zone, the transition zone, and the rough zone. With 1.6-μm set as the standard roughness, the length of the initial zones and the smooth zone were analyzed and determined. From a microperspective, there are a large number of particle scratches with micron scale size laid on the cutting surface. The experimental results showed that the length of the scratches in the initial zone was less than the one in the smooth zone, while it was opposite in the scratch depth and width, and that the initial zone is larger than the smooth zone in surface roughness could be explained. The abrasive particle size is the only influent parameters of the scratch size, and small abrasive particles can be used for reducing the roughness in the initial zone and smooth zone. The conclusions can provide theory guidance for abrasive water jet processing titanium alloys precisely. Keywords Abrasive suspension jet . Titanium alloys . Macrosurface topography . Microsurface topography . Quantitative analysis
1 Introduction With the advantages of no residual stress, no thermal effects, good machining precision, and high applicability of materials, abrasive water jet (AWJ) becomes a most potential nontraditional processing technology [1–3]. It has been used in processing various materials, such as metals, ceramics, composite, and armored glass [4–7]. The AWJ can be divided into abrasive water injection jet (AWIJ) and abrasive suspension jet (ASJ) according to the different ways of mixture between abrasive and water. With air sucked into the water jet from the sand mixing tube, AWIJ becomes an air-liquid-solid threephase medium jet composed of water, air, and abrasive particles. It will reduce the convergence of water jet and accelerates the decay of particle velocity, leading a poor processing * Guo Chuwen [email protected] 1
School of Electrical Power and Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
capacity and quality [8]. To solve this problem, ASJ was presented that is a liquid-solid two-phase medium jet just composed of water and abrasive particles. ASJ is better than AWIJ in jet c
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