Titanium alloy parts prepared by additive manufacturing(AM)technology have a wide range of applications in the aerospace field.For the precision parts of AM titanium alloy,post-processing such as milling and polishing are essential processes.The polycrystalline diamond(PCD)micro end mill is used to carry out micro-milling experiments on forged titanium alloy and titanium alloys prepared by selective laser melting(SLM)technology without heat treatment and after heat treatment.The micro-milling properties of titanium alloy materials prepared by three different manufacturing processes are studied.The results show that the milling force of SLM-heat-treated titanium alloy is the highest,which is related to the highest hardness of the material.In micro-milling,the size of top-burrs on the up-milling side is larger than that on the down-milling side for all materials.Among the titanium alloy materials,SLM-titanium alloy generated the smallest top-burr width,which is related to its poor plasticity.The surface quality of SLM-heat-treated titanium alloy is the best,which is not only related to the hardness and plasticity of the material,but also affected by the porosity of the material.
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