Through-Thickness Compression Testing of Commercially Pure (Grade II) Titanium Thin Sheet to Large Strains

Figure 3

(a) Sample 1 was originally cut by EDM and used dry graphite powder for lubrication. This sample was remachined using a conventional lathe method after phases 1, 2, and 3 (indicated by next to the individual phase ratios). Lubrication was reapplied between each phase. The average . (b) Sample 2 was originally cut by EDM and MoS₂ aerosol was used for lubrication. This sample was not remachined after any phases. Lubrication was applied between each phase. The average . (c) Sample 3 was originally cut by EDM and MoS₂ aerosol was used for lubrication. This sample was ultrasonically remachined after phases 5 and 6 (indicated by next to the individual phase ratios). Lubrication was reapplied between each phase. The average . (d) Sample 4 was originally cut by EDM and MoS₂ aerosol was used for lubrication. This sample was ultrasonically remachined after phases 5 and 6 (indicated by next to the individual phase ratios). Lubrication was reapplied between each phase. The average . (e) Sample 7 was originally cut by EDM. MoS₂ aerosol and Teflon paper were used for lubrication. Both faces of the sample were polished to a 0.05 μm finish and repolished between each phase. This sample was remachined ultrasonically after phase 5 (indicated by next to the individual phase ratio). Lubrication was reapplied between each phase. The average . (f) Sample 8 was originally cut by EDM and MoS₂ aerosol and Teflon paper were used for lubrication. Both faces of the sample were polished to a 0.05 μm finish and repolished between each phase. This sample was remachined ultrasonically after phase 9 (indicated by next to the individual phase ratio). Lubrication was reapplied between each phase. The average . (g) Sample 10 was originally cut by EDM and MoS₂ aerosol and Teflon paper were used for lubrication. Both faces of the sample were polished to a 0.05 μm finish and repolished between each phase. This sample was remachined ultrasonically after phase 5 (indicated by next to the individual phase ratio). Lubrication was reapplied between each phase. The average . The repolishing of the specimen surface may not have imported the quality of the data over nonsurface polished specimens.

(a)

(b)

(c)

(d)

(e)

(f)

(g)