Determination of the X-Ray Elastic Constants of the Ti-6Al-4V Processed by Powder Bed-Laser Beam Melting

Determination of the X-Ray Elastic Constants of the Ti-6Al-4V Processed by Powder Bed-Laser Beam Melting

N. Dumontet, G. Geandier, F. Galliano, B. Viguier, B. Malard

Abstract. The determination of residual stresses (RS) through X-Ray Diffraction (XRD) necessitates the knowledge of the X-Ray Elastic Constants (XEC) S1 and 1/2 S2 for the specific phase in presence. In the case of Ti-6Al-4V additive manufacturing (AM) elaboration method such as Powder Bed Laser Beam Melting (PB-LBM) results in a microstructure fully constituted α’ martensitic phase. The properties of this α’ martensite are largely unknown. The purpose of the present paper is to determine the XEC of the α’ martensitic phase. This is performed using an original methodology involving 2D X-Ray detection. The results shows significant differences with XEC values available for the α phase from Titanium.

Keywords
X-Ray Elastic Constants, Laser Beam Melting, Martensitic Phase, Ti64

Published online 9/11/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: N. Dumontet, G. Geandier, F. Galliano, B. Viguier, B. Malard, ‘Determination of the X-Ray Elastic Constants of the Ti-6Al-4V Processed by Powder Bed-Laser Beam Melting’, Materials Research Proceedings, Vol. 6, pp 289-294, 2018

DOI: https://dx.doi.org/10.21741/9781945291890-46

The article was published as article 46 of the book Residual Stresses 2018

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] B. Vrancken, V. Cain, R. Knutsen, J. Van Humbeeck, Residual stress via the contour method in compact tension specimens produced via selective laser melting, Scripta Mater. 87 (2014) 29-32. https://doi.org/10.1016/j.scriptamat.2014.05.016
[2] J. Yang, H. Yu, J. Yin, M. Gao, Z. Wang, X. Zeng, Formation and control of martensite in Ti-6Al-4V alloy produced by selective laser melting, Materials and Design 108 (2016) 308-318. https://doi.org/10.1016/j.matdes.2016.06.117
[3] A. Vasinonta, J.L. Beuth, M. Griffith, Process maps for predicting residual stress and melt pool size in the laser-based fabrication of thin-walled structures, J. Manuf. Sci. Eng 129 (2006) 101-109. https://doi.org/10.1115/1.2335852
[4] G. Vastola, G. Zhang, Q.X. Pei, Y.-W. Zhang, Controlling of residual stress in additive manufacturing of Ti6Al4V by finite element modeling, Add. Manufacturing 12 (2016) 231-239. https://doi.org/10.1016/j.addma.2016.05.010
[5] Y. Liu, Y. Yang, D. Wang, A study on the residual stress during selective laser melting of metallic powder, Int. J. Adv. Manuf. Tech. 87 (2016) 647-656. https://doi.org/10.1007/s00170-016-8466-y
[6] J. Grum, R. Sturm, A new experimental technique for measuring strain and residual stresses during a laser remelting process, J. of Mat. Processing Tech. 147 (2016) 351-358. https://doi.org/10.1016/j.jmatprotec.2004.01.007
[7] P. Mercelis, J.-P. Kruth, Residual stresses in selective laser sintering and selective laser melting, Prototyping Journal, 12 (2006) 254-265. https://doi.org/10.1108/13552540610707013
[8] V. Hauk, Structural and Residual stress analysis by nondestructive methods, Elsevier, Amsterdam, 1997, Chapter 13
[9] B. Eigenmann, E. Macherauch, Rontgengraphische Untersuchung von Spannungszustanden in Werkstoffen, Teil III, Material-wissenschaft und werkstofftechnik, Bd.27, (1995) 426-437. https://doi.org/10.1002/mawe.19960270907
[10] G. Bruno, B. Dunn, The precise measurement of Ti6Al4V microscopic elastic constants by means of neutron diffraction, Meas. Schi. Technol. 8 (1997) 1244-1249. https://doi.org/10.1088/0957-0233/8/11/006
[11] L. Vautrot, G. Geandier, M. Mourot, M. Dehmas, E. Aeby-Gautier, B. Denand, S. Denis, Internal stresses in Metal Matrix Composites in relation with matrix phase transformations, Advanced Materials Research, 996 (2014) 944-950. https://doi.org/10.4028/www.scientific.net/AMR.996.944
[12] V. Ji, Contribution à l’analyse par diffraction des rayons X de l’état microstructural et mécanique des matériaux hétérogène, Habilitation à Diriger des Recherche, Université des Sciences et Technologies de Lille (2003)
[13] N. Dumontet, D. Connetable, B. Malard, B. Viguier, Elastic properties of the α’ martensitic phase of the Ti-6Al-4V, to be published