BS EN ISO 5832-3:2016 pdf download.lmplants for surgery — Metallic materials Part 3: Wrought titanium 6-aluminium 4-vanadium alloy.
ln this annex, two different standards are referenced showing microstructures of typical alpha+betatitanium alloy Ti 6Al 4V intended for the use of identification and classification of the microstructureof a given material. 1SO 20160 is presenting microstructures in the transverse section at x200magnification.1S0 20160 applies to round bars up to a nominal diameter of 100 mm.It was replacingETTC 2 Edition 2.
Microstructures of flat rolled products, like sheet or plates, cannot be rated according to ETTC 2.For this type of product, another microstructural catalogue was made available. ETTC 4 Edition 2is showing microstructures in the transverse section at ×100 and x500 magnification. Product sizesof this catalogue were limited to a range of thicknesses above 5 mm and below 30 mm. The samemicrostructures are shown in EN 3114-003 but with different designations. Table A.1 shows thecorrelation of the designations of the micrographs between ETTC 4 Edition 2 and EN 3114-003.
ETTC4Edition 2 is showing acceptable microstructures in the range ofP1 to P36 for Standard AerospaceQuality (STQ).For medical application, the range of acceptable microstructures is intentionally limitedto P1 (3T1) to P13 (3T13) at ×100 magnification showing globular structures.
ETTC 4 Edition 2 is considering only plates,i.e. products over or equal 5 mm in thickness. It isrecommended here to use the microstructural pictures also for sizes equal to or below 5 mm.
