%0 journal article
%@ 0032-5899
%A Xu, P., Ebel, T., Pyczak, F., Willumeit-Römer, R., Yu, S.

%D 2022
%J Powder Metallurgy
%N 5
%P 354-364 
%R doi:10.1080/00325899.2022.2069077
%T Influence of defects on damage tolerance of Metal-Injection-Molded β titanium alloys under static and dynamic loading
%U https://doi.org/10.1080/00325899.2022.2069077
5 
%X The β titanium alloys are key materials in lightweight and biomedical applications, due to the combination of excellent biocompatibility and mechanical properties. However, the Binder-based Powder Technologies such as Metal-Injection-Molding (MIM), Binder-Jetting and Fused-Filament-Fabrication, normally introduce three major processing-related defects in the as-sintered Ti-parts: (i) residual porosity, (ii) high impurity level and (iii) coarse-grained structure. The previous studies revealed that these processing defects invariably tend to be even more severe in β titanium alloys than in α/β Ti-6Al-4V alloy, all fabricated by powder metallurgical route. In this work, these processing defects and their likely origins in MIM β titanium alloys are analysed. Furthermore, the influence of these defects on damage tolerance and fracture mechanisms of MIM β titanium alloys under either static or dynamic loading is investigated. Based on the studies, strategic technical improvements in the processing to improve the reliability of MIM β titanium alloys products are proposed.