Abstract

The present article establishes a fundamental correlation between surface integrity characteristics of the finished surface with the normal to tangential force ratio (F_n/F_t) in the grinding of Ti-6Al-4V. The subsurface deformation, crystallographic texture, surface redeposition, and residual stress were studied in the surface integrity characteristics. The XRD result indicated deformation-induced texturing of the α-002 basal plane of Ti-6Al-4V. The gradual reduction in texturing along the depth was confirmed by the Gi-XRD investigation. The relative intensity of the 002 peak was utilized as a quantitative indicator of subsurface deformation. The XRD and the metallographic study revealed a considerable amount of subsurface deformation at a higher grinding speed (v_s) and an enhanced material removal rate (MRR). Intense surface redeposition was also observed for higher v_s and increased MRR grinding conditions. The surface redeposition was identified as an influencing factor that escalates the subsurface deformation and crystallographic texture. In addition, the residual stress was found to be more compressive at enhanced v_s and MRR. Further, a higher force ratio F_n/F_t was noticed for the grinding conditions that revealed significant subsurface deformation, strong crystallographic texture, surface redeposition, and more compressive residual stress. Eventually, a correlation was found between the force ratio F_n/F_t and all these surface integrity characteristics.

摘要

本文建立了Ti-6Al-4V 磨削中成品表面的表面完整性特征与法向力与切向力比 (F _n /F _{t ) 之间的基本相关性。}在表面完整性特征中研究了地下变形、晶体织构、表面再沉积和残余应力。XRD 结果表明 Ti-6Al-4V 的 α-002 基面存在变形引起的织构化。Gi-XRD 研究证实了纹理沿深度的逐渐减少。002峰的相对强度被用作地下变形的定量指标。XRD 和金相研究表明，在较高磨削速度 ( v_s ) 和增强的材料去除率 (MRR)。在较高的Vs和增加的 MRR 研磨条件下也观察到强烈的表面再沉积_。表面再沉积被认为是加剧地下变形和晶体结构的影响因素。此外，发现残余应力在增强的 vs 和 MRR 下更具_压缩性。此外，我们注意到磨削条件下的力比 F _n /F _{t较高，显示出显着的表面下变形、强晶体织构、表面再沉积和更大的残余压应力。}最终，发现力比 F _n /F _{t之间存在相关性}以及所有这些表面完整性特征。