TY  - JOUR
T1  - Effect of Build Orientation and Heat Treatment on Shear Strength of Additively Manufactured Ti6Al4V Alloy
AU  - Polat, Yusuf
AU  - Kaya, Gürkan
PY  - 2025
DA  - September
Y2  - 2025
DO  - 10.17798/bitlisfen.1714462
JF  - Bitlis Eren Üniversitesi Fen Bilimleri Dergisi
PB  - Bitlis Eren University
WT  - DergiPark
SN  - 2147-3129
SP  - 1759
EP  - 1771
VL  - 14
IS  - 3
LA  - en
AB  - This study investigates the effects of build orientation and heat treatment on the transverse shear properties of additively manufactured Ti6Al4V alloy produced by laser powder bed fusion (LPBF). Specimens were fabricated in three different build orientations (0°, 45°, and 90°) and subjected to heat treatment at 900 °C under argon gas atmosphere. Transverse shear strength was evaluated using the short beam shear test method. The results revealed that build orientation significantly affects both shear strength and ductility of materials. Compared to the 0° reference, the 45° and 90° samples showed an approximately 43% increase in shear strength, along with 56% and 103% increases in displacement, respectively. Heat treatment further enhanced the ductility, especially for the 45° oriented specimen, which exhibited the highest displacement and a 26% increase in shear strength compared with reference 0° sample. However, heat treatment slightly reduced the strength of the 45° and 90° specimens relative to their untreated counterparts. Fractographic analysis confirmed quasi-brittle failure with the presence of dimples, indicating enhanced ductility post-heat treatment. These findings provide novel insight into optimizing process parameters and post-processing strategies to improve the shear performance of LPBF Ti6Al4V components for critical structural applications.
KW  - laser powder bed fusion
KW  - Ti6Al4V alloy
KW  - shear strength
KW  - build orientation
KW  - heat treatment
KW  - fracture behavior
CR  - G. Liu et al., ‘Development of Bioimplants with 2D, 3D, and 4D Additive Manufacturing Materials’, Engineering, vol. 6, no. 11, pp. 1232–1243, Nov. 2020, doi: 10.1016/j.eng.2020.04.015.
CR  - X. Wang et al., ‘Topological design and additive manufacturing of porous metals for bone scaffolds and orthopaedic implants: A review’, Biomaterials, vol. 83, pp. 127–141, Mar. 2016, doi: 10.1016/j.biomaterials.2016.01.012.
CR  - E. Alabort, D. Barba, and R. C. Reed, ‘Design of metallic bone by additive manufacturing’, Scripta Materialia, vol. 164, pp. 110–114, Apr. 2019, doi: 10.1016/j.scriptamat.2019.01.022.
CR  - V. Madhavadas et al., ‘A review on metal additive manufacturing for intricately shaped aerospace components’, CIRP Journal of Manufacturing Science and Technology, vol. 39, pp. 18–36, Nov. 2022, doi: 10.1016/j.cirpj.2022.07.005.
CR  - V. Mohanavel, K. S. Ashraff Ali, K. Ranganathan, J. Allen Jeffrey, M. M. Ravikumar, and S. Rajkumar, ‘The roles and applications of additive manufacturing in the aerospace and automobile sector’, Materials Today: Proceedings, vol. 47, pp. 405–409, Jan. 2021, doi: 10.1016/j.matpr.2021.04.596.
CR  - V. Juechter, M. M. Franke, T. Merenda, A. Stich, C. Körner, and R. F. Singer, ‘Additive manufacturing of Ti-45Al-4Nb-C by selective electron beam melting for automotive applications’, Additive Manufacturing, vol. 22, pp. 118–126, Aug. 2018, doi: 10.1016/j.addma.2018.05.008.
CR  - M. S. Muhammad, L. Kerbache, and A. Elomri, ‘Potential of additive manufacturing for upstream automotive supply chains’, Supply Chain Forum: An International Journal, vol. 23, no. 1, pp. 1–19, Jan. 2022, doi: 10.1080/16258312.2021.1973872.
CR  - F. A. Talebi et al., ‘Spreadability of powders for additive manufacturing: A critical review of metrics and characterisation methods’, Particuology, vol. 93, pp. 211–234, Oct. 2024, doi: 10.1016/j.partic.2024.06.013.
CR  - L. Jin et al., ‘Big data, machine learning, and digital twin assisted additive manufacturing: A review’, Materials & Design, vol. 244, p. 113086, Aug. 2024, doi: 10.1016/j.matdes.2024.113086.
CR  - I. Astm, ‘ASTM F2792-10: standard terminology for additive manufacturing technologies’, ASTM International, 2010.
CR  - D. Sarkar, A. Kapil, and A. Sharma, ‘Advances in computational modeling for laser powder bed fusion additive manufacturing: A comprehensive review of finite element techniques and strategies’, Additive Manufacturing, vol. 85, p. 104157, Apr. 2024, doi: 10.1016/j.addma.2024.104157.
CR  - T. DebRoy et al., ‘Additive manufacturing of metallic components – Process, structure and properties’, Progress in Materials Science, vol. 92, pp. 112–224, Mar. 2018, doi: 10.1016/j.pmatsci.2017.10.001.
CR  - S. Chowdhury et al., ‘Laser powder bed fusion: a state-of-the-art review of the technology, materials, properties & defects, and numerical modelling’, Journal of Materials Research and Technology, vol. 20, pp. 2109–2172, 2022.
CR  - J.-P. Kruth, G. Levy, F. Klocke, and T. H. C. Childs, ‘Consolidation phenomena in laser and powder-bed based layered manufacturing’, CIRP Annals, vol. 56, no. 2, pp. 730–759, Jan. 2007, doi: 10.1016/j.cirp.2007.10.004.
CR  - W. Abd-Elaziem et al., ‘On the current research progress of metallic materials fabricated by laser powder bed fusion process: a review’, Journal of Materials Research and Technology, vol. 20, pp. 681–707, Sept. 2022, doi: 10.1016/j.jmrt.2022.07.085.
CR  - G. Kaya et al., ‘Effects of process parameters on selective laser melting of Ti6Al4V-ELI alloy and parameter optimization via response surface method’, Materials Science and Engineering: A, vol. 885, p. 145581, Oct. 2023, doi: 10.1016/j.msea.2023.145581.
CR  - C. Bulut, F. Yıldız, T. Varol, G. Kaya, and T. O. Ergüder, ‘Effects of Selective Laser Melting Process Parameters on Structural, Mechanical, Tribological and Corrosion Properties of CoCrFeMnNi High Entropy Alloy’, Met. Mater. Int., vol. 30, no. 11, pp. 2982–3004, Nov. 2024, doi: 10.1007/s12540-024-01694-w.
CR  - T. Varol, H. C. Aksa, F. Yıldız, S. B. Akçay, G. Kaya, and M. Beder, ‘Influence of post processing on the mechanical properties and wear behavior of selective laser melted Co-Cr-Mo-W alloys’, Tribology International, vol. 192, p. 109336, Apr. 2024, doi: 10.1016/j.triboint.2024.109336.
CR  - G. Kaya, U. Köklü, T. O. Ergüder, F. Cengiz, and F. Yıldız, ‘Effects of build orientation and hatch spacing on high-speed milling behavior of L-PBF 316L stainless steel’, Materials Testing, vol. 65, no. 10, pp. 1571–1581, Oct. 2023, doi: 10.1515/mt-2023-0210.
CR  - J. Zhao, H. Liu, Y. Zhou, Y. Chen, and J. Gong, ‘Effect of relative density on the compressive properties of Ti6Al4V diamond lattice structures with shells’, Mechanics of Advanced Materials and Structures, vol. 29, no. 22, pp. 3301–3315, Aug. 2022, doi: 10.1080/15376494.2021.1893418.
CR  - T. Ahmed and H. J. Rack, ‘Phase transformations during cooling in α + β titanium alloys’, Materials Science and Engineering: A, vol. 243, no. 1–2, pp. 206–211, 1998, doi: 10.1016/s0921-5093(97)00802-2.
CR  - A. A. Antonysamy, Microstructure, texture and mechanical property evolution during additive manufacturing of Ti6Al4V alloy for aerospace applications. The University of Manchester (United Kingdom), 2012. Accessed: May 02, 2025. [Online]. Available: https://search.proquest.com/openview/6d22965546ce3092918e9ad2280b68fc/1?pq-origsite=gscholar&cbl=51922
CR  - B. Vrancken, L. Thijs, J.-P. Kruth, and J. 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, Nov. 2012, doi: 10.1016/j.jallcom.2012.07.022.
CR  - H. Zhang, T. Gao, C. Xu, L. Zhao, H. Song, and G. Huang, ‘Study on the Tensile and Shear Behaviors of Selective Laser Melting Manufactured Ti6Al4V’, Met. Mater. Int., vol. 29, no. 10, pp. 2852–2864, Oct. 2023, doi: 10.1007/s12540-023-01433-7.
CR  - P. K. Singh, S. Kumar, P. K. Jain, and U. S. Dixit, ‘Effect of Build Orientation on Metallurgical and Mechanical Properties of Additively Manufactured Ti-6Al-4V Alloy’, J. of Materi Eng and Perform, vol. 33, no. 7, pp. 3476–3493, Apr. 2024, doi: 10.1007/s11665-023-08218-4.
CR  - X. Yang et al., ‘Multi-build orientation effects on microstructural evolution and mechanical behavior of truly as-built selective laser melting Ti6Al4V alloys’, Journal of Materials Research and Technology, vol. 30, pp. 3967–3976, May 2024, doi: 10.1016/j.jmrt.2024.04.031.
CR  - I. Katzarov, S. Malinov, and W. Sha, ‘Finite element modeling of the morphology of β to α phase transformation in Ti-6Al-4V alloy’, Metall Mater Trans A, vol. 33, no. 4, pp. 1027–1040, Apr. 2002, doi: 10.1007/s11661-002-0204-4.
CR  - N. Stefansson, S. L. Semiatin, and D. Eylon, ‘The kinetics of static globularization of Ti-6Al-4V’, Metall Mater Trans A, vol. 33, no. 11, pp. 3527–3534, Nov. 2002, doi: 10.1007/s11661-002-0340-x.
CR  - S. Malinov, Z. Guo, W. Sha, and A. Wilson, ‘Differential scanning calorimetry study and computer modeling of β ⇒ α phase transformation in a Ti-6Al-4V alloy’, Metall Mater Trans A, vol. 32, no. 4, pp. 879–887, Apr. 2001, doi: 10.1007/s11661-001-0345-x.
CR  - R. Pederson, O. Babushkin, F. Skystedt, and R. Warren, ‘Use of high temperature X-ray diffractometry to study phase transitions and thermal expansion properties in Ti-6Al-4V’, Materials Science and Technology, vol. 19, no. 11, pp. 1533–1538, 2003, doi: 10.1179/026708303225008013.
CR  - M.-T. Tsai et al., ‘Heat-treatment effects on mechanical properties and microstructure evolution of Ti-6Al-4V alloy fabricated by laser powder bed fusion’, Journal of Alloys and Compounds, vol. 816, p. 152615, Mar. 2020, doi: 10.1016/j.jallcom.2019.152615.
CR  - S. A. Etesami, B. Fotovvati, and E. Asadi, ‘Heat treatment of Ti-6Al-4V alloy manufactured by laser-based powder-bed fusion: Process, microstructures, and mechanical properties correlations’, Journal of Alloys and Compounds, vol. 895, p. 162618, 2022.
CR  - L. Thijs, F. Verhaeghe, T. Craeghs, J. V. Humbeeck, and J.-P. Kruth, ‘A study of the microstructural evolution during selective laser melting of Ti–6Al–4V’, Acta Materialia, vol. 58, no. 9, pp. 3303–3312, May 2010, doi: 10.1016/j.actamat.2010.02.004.
CR  - X. Yan et al., ‘Effect of heat treatment on the phase transformation and mechanical properties of Ti6Al4V fabricated by selective laser melting’, Journal of Alloys and Compounds, vol. 764, pp. 1056–1071, Oct. 2018, doi: 10.1016/j.jallcom.2018.06.076.
CR  - M. Simonelli, Y. Y. Tse, and C. Tuck, ‘Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V’, Materials Science and Engineering: A, vol. 616, pp. 1–11, Oct. 2014, doi: 10.1016/j.msea.2014.07.086.
CR  - J. M. Jeon et al., ‘Effects of microstructure and internal defects on mechanical anisotropy and asymmetry of selective laser-melted 316L austenitic stainless steel’, Materials Science and Engineering: A, vol. 763, p. 138152, Aug. 2019, doi: 10.1016/j.msea.2019.138152.
CR  - Z. Xie, Y. Dai, X. Ou, S. Ni, and M. Song, ‘Effects of selective laser melting build orientations on the microstructure and tensile performance of Ti–6Al–4V alloy’, Materials Science and Engineering: A, vol. 776, p. 139001, Mar. 2020, doi: 10.1016/j.msea.2020.139001.
CR  - R. Sabban, S. Bahl, K. Chatterjee, and S. Suwas, ‘Globularization using heat treatment in additively manufactured Ti-6Al-4V for high strength and toughness’, Acta Materialia, vol. 162, pp. 239–254, Jan. 2019, doi: 10.1016/j.actamat.2018.09.064.
CR  - C. Wang, Y. Lei, and C. Li, ‘Achieving an Excellent Strength and Ductility Balance in Additive Manufactured Ti-6Al-4V Alloy through Multi-Step High-to-Low-Temperature Heat Treatment’, Materials, vol. 16, no. 21, p. 6947, Jan. 2023, doi: 10.3390/ma16216947.
UR  - https://doi.org/10.17798/bitlisfen.1714462
L1  - https://dergipark.org.tr/en/download/article-file/4936679
ER  -