Fatigue Assessment of Ti–6Al–4V Circular Notched Specimens Produced by Selective Laser Melting
作者： Seyed-Mohammad-Javad Razavi , Paolo Ferro , Filippo Berto
DOI: 10.3390/MET7080291
关键词:
摘要: Additive manufacturing (AM) offers the potential to economically produce customized components with complex geometries in a shorter design-to-manufacture cycle. However, basic understanding of fatigue behavior these materials must be substantially improved at all scale levels before unique features this rapidly developing technology can used critical load bearing applications. This work aims assess strength Ti–6Al–4V smooth and circular notched samples produced by selective laser melting (SLM). Scanning Electron Microscopy (SEM) was investigate fracture surface broken order identify crack initiation points mechanisms. Despite observed reduction induced specimens compared specimens, showed very low notch sensitivity attributed both hexagonal crystal lattice characteristics tempered alpha prime grains defects SLM process itself.
bibsys.no 
mdpi.com 参考文章(23)
I. Yadroitsev, I. Smurov, Surface Morphology in Selective Laser Melting of Metal Powders Physics Procedia. ,vol. 12, pp. 264- 270 ,(2011) , 10.1016/J.PHPRO.2011.03.034
Xinhua Wu, Jing Liang, Junfa Mei, C. Mitchell, P.S. Goodwin, W. Voice, Microstructures of laser-deposited Ti–6Al–4V Materials & Design. ,vol. 25, pp. 137- 144 ,(2004) , 10.1016/J.MATDES.2003.09.009
F. Berto, E. Barati, Fracture assessment of U-notches under three point bending by means of local energy density Materials & Design. ,vol. 32, pp. 822- 830 ,(2011) , 10.1016/J.MATDES.2010.07.017
Xiu Song, Lei Wang, Mitsuo Niinomi, Masaaki Nakai, Yang Liu, Miaoyong Zhu, Microstructure and fatigue behaviors of a biomedical Ti–Nb–Ta–Zr alloy with trace CeO2 additions Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 619, pp. 112- 118 ,(2014) , 10.1016/J.MSEA.2014.09.069
S. Leuders, M. Thöne, A. Riemer, T. Niendorf, T. Tröster, H.A. Richard, H.J. Maier, On the mechanical behaviour of titanium alloy TiAl6V4 manufactured by selective laser melting: Fatigue resistance and crack growth performance International Journal of Fatigue. ,vol. 48, pp. 300- 307 ,(2013) , 10.1016/J.IJFATIGUE.2012.11.011
Monika Blattmeier, Gerd Witt, Johannes Wortberg, Jan Eggert, Jochen Toepker, Influence of surface characteristics on fatigue behaviour of laser sintered plastics Rapid Prototyping Journal. ,vol. 18, pp. 161- 171 ,(2012) , 10.1108/13552541211212140
Bey Vrancken, Lore Thijs, Jean-Pierre Kruth, Jan Van Humbeeck, Heat treatment of Ti6Al4V produced by Selective Laser Melting: Microstructure and mechanical properties Journal of Alloys and Compounds. ,vol. 541, pp. 177- 185 ,(2012) , 10.1016/J.JALLCOM.2012.07.022
J‐P. Kruth, P. Mercelis, J. Van Vaerenbergh, L. Froyen, M. Rombouts, Binding Mechanisms in Selective Laser Sintering and Selective Laser Melting Rapid Prototyping Journal. ,vol. 11, pp. 26- 36 ,(2005) , 10.1108/13552540510573365
F. Berto, P. Lazzarin, M.R. Ayatollahi, Brittle fracture of sharp and blunt V-notches in isostatic graphite under pure compression loading Carbon. ,vol. 63, pp. 101- 116 ,(2013) , 10.1016/J.CARBON.2013.06.045
T. Vilaro, C. Colin, J. D. Bartout, As-Fabricated and Heat-Treated Microstructures of the Ti-6Al-4V Alloy Processed by Selective Laser Melting Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 42, pp. 3190- 3199 ,(2011) , 10.1007/S11661-011-0731-Y