Hostname: page-component-8448b6f56d-wq2xx Total loading time: 0 Render date: 2024-04-23T14:36:02.626Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructural Study of Laser Formed Ti-6Al-4V

Published online by Cambridge University Press:  10 February 2011

S.M. Kelly ,
S.L. Kampe  and
C.R. Crowe
S.M. Kelly
Affiliation:
Materials Science and Engineering Department, Virginia Tech, Blacksburg, VA 24061-0237
S.L. Kampe
Affiliation:
Materials Science and Engineering Department, Virginia Tech, Blacksburg, VA 24061-0237
C.R. Crowe
Affiliation:
Virginia Tech Alexandria Research Institute, Alexandria, VA 22314
Get access

Abstract

A microstructural evaluation of as-deposited LasformedSM Ti-6Al-4V, a Laser Additive Manufacturing (LAM) process, is the subject of the current work. Distinct features of the macrostructure include: large columnar prior-β grains (the initial solid to form upon cooling from the melt) have grown through multiple deposited layers due to epitaxial growth from previously solidified layers; a well defined heat affected zone; the presence of “layer bands,” which are speculated to be a result of macrosegregation in the solidifying melt puddle and/or the complex thermal history that the part received as it was built, layer by layer. The microstructure of the layer band consists of larger colonies of acicular α outlined in transformed β, whereas the adjacent material consists of smaller colonies having the same type of structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 625: Symposium Y – Solid Freeform & Additive Fabrication – 2000 , 2000 , 3
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Arcella, F.G., Abbott, D.H., and House, M.A., Presented in the Rapid Prototyping Session of the 1998 Powder Metallurgy World Conference and Exposition, Granada, Spain, October 18-22, 1998.Google Scholar
2 Arcella, F.G., Abbott, D.H., and House, M.A., AIAA Paper 2000-1465, Presented at the 41st AIAA Structures, Structural Dynamics & Materials Conference, Atlanta, GA, April 11, 2000.Google Scholar
3 AeroMet Corporation web site: http://www.aerometcorp.comGoogle Scholar
4 Brooks, J., Robino, C., Headley, T., Goods, S., Griffith, M., in Proceedings of the Solid Freeform Fabrication Symposium, edited by Bourell, D.L., Beaman, J.L., Crawford, R.H., Marcus, H.L., and Barlow, J.W. (Austin, TX, 1999) pp. 375–382.Google Scholar
5 Griffith, M.L., Schlienger, M.E., Harwell, L.D., Oliver, M.S., Baldwin, M.D., Ensz, M.T., Essien, M., Brooks, J., Robino, C.V., Smugeresky, J.E., Hofmeister, W.H., Wert, M.J., and Nelson, D.V., Materials and Design 20, pp. 107–113 (1999).Google Scholar
6 Easterling, K.E., Introduction to the Physical Metallurgy of Welding, 1st ed. (Butterworths, Boston, 1983), pp. 52–59.Google Scholar
7 , Boyer, Rodney, R., in Metals Handbook: Metallography and Microstructures, 9th ed., vol.9, (American Society for Materials, Materials Park, OH, 1985) pp. 458–475.Google Scholar
8 III, W.A. Baeslack, Mat. Sci. Letters. 1, pp. 229–231 (1982).Google Scholar
9 D‘Annessa, A.T., Weld. J. 45, pp. 569s–576s (1966).Google Scholar
10 Davies, G.J., Garland, J.G., Int. Metallurgical Reviews 20, pp. 83–106 (1975).Google Scholar
11 III, W.A. Baeslack, Becker, D.W., and Froes, F.H., JOM 36 (5), pp. 46–58 (1984).Google Scholar
12 III, W.A. Baeslack, Davis, J.R., and Cross, C.E., in ASM Handbook: Welding, Brazing, and Soldering 9th ed., vol. 6, (ASM Intl., Materials Park, OH, 1993) pp. 507–523.Google Scholar