Skip to main content
SpringerLink
Log in

Plastic flow and microstructure evolution during thermomechanical processing of laser-deposited Ti-6Al-4V preforms

  • Published:
Metallurgical and Materials Transactions A Aims and scope Submit manuscript

Abstract

Plastic flow behavior and microstructure evolution during hot working and heat treatment of Ti-6Al-4V synthesized via a laser-deposition, Laser Engineered Net Shaping (LENSℳ), process were established. To this end, isothermal, hot compression tests were conducted on samples in either a deposited + stress relieved condition or a deposited + hot isostatically pressed (hipped) condition. The starting microstructures consisted of columnar grains with fine or coarse Widmanstätten (basketweave) alpha platelets. At subtransus temperatures, the flow curves of both microstructural conditions exhibited a peak stress at low strains followed by extensive flow softening; these curves were almost identical to previous measurements on ingot-metallurgy (IM) Ti-6Al-4V with similar transformed microstructures. In addition, the kinetics of globularization of the alpha phase during subtransus deformation or subsequent static heat treatment were found to be the same as for IM Ti-6Al-4V with comparable alpha-platelet thicknesses. During supertransus heat treatment, moderately fine beta-grain microstructures were developed in samples that had been predeformed below the beta transus. Such a heat treatment for samples previously deformed above the transus gave rise to a nonuniform distribution of coarse beta grains, an effect attributed to critical grain growth.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. S.L. Semiatin, V. Seetharaman, and I. Weiss: in Advances in the Science and Technology of Titanium Alloy Processing, I. Weiss, R. Srinivasan, P.J. Bania, D. Eylon, and S.L. Semiatin, eds., TMS, Warrendale, PA, 1997, pp. 3–73.

    Google Scholar 

  2. J.T. Schriempf, E.J. Whitney, P.A. Blomquist, and F.G. Arcella: in Advances in Powder Metallurgy and Particulate Materials, Metal Powder Industries Federation, Princeton, NJ, 1997, vol. 3, pp. 21–31.

    Google Scholar 

  3. D.M. Keicher and W.d. Miller: in Carbides and Nitrides: Synthesis, Characterization, and Applications, TMS, Warrendale, PA, 1998, p. 369.

    Google Scholar 

  4. G.K. Lewis and E. Schlienger: Mater. Design, 2000, vol. 21, pp. 417–23.

    Article  CAS  Google Scholar 

  5. S.L. Semiatin, V. Seetharaman, and I. Weiss: Mater. Sci. Eng. A, 1999, vol. A263, pp. 257–71.

    CAS  Google Scholar 

  6. E.B. Shell and S.L. Semiatin: Metall. Mater. Trans. A, 1999, vol. 30A, pp. 3219–3329.

    CAS  Google Scholar 

  7. S.L. Semiatin and T.R. Bieler: Metall. Mater. Trans. A, 2001, vol. 32A, pp. 1787–99.

    CAS  Google Scholar 

  8. I. Weiss and S.L. Semiatin: Mater. Sci. Eng. A, 1999, vol. A243, pp. 46–65.

    Google Scholar 

  9. J.J. Jonas and H.J. McQueen: in Treatise on Materials Science and Technology, vol. 6, Plastic Deformation of Metals, R.J. Arsenault, ed., Academic Press, New York, NY, 1975, pp. 394–490.

    Google Scholar 

  10. N. Stefansson: Ph.D. Thesis, University of Dayton, Dayton, OH, 2000.

    Google Scholar 

  11. R.W. Cahn and P. Haasen: Physical Metallurgy, North-Holland, Amsterdam, 1996.

    Google Scholar 

  12. D.U. Furrer, E. Heinritz, and R.R. Boyer: Ladish Co., Inc., Cudahy, WI, unpublished research, 2000.

  13. F.G. Arcella and F.H. Froes: JOM, 2000, vol. 52(5), pp. 28–30.

    CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. the Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/MLLM, 45433-7817, Wright-Patterson Air Force Base, OH

    S. L. Semiatin (Senior Scientist, Materials Processing Processing Science) & P. A. Kobryn (Materials Engineer)

  2. the Department of Mechanical and Materials Engineering, Wright State University, 45435, Dayton, OH

    E. D. Roush (Undergraduate Student)

  3. Ladish Company, 53110, Cudahy, WI

    D. J. Furrer (Manager, Advanced Materials and Process Technology)

  4. the Wyman-Gordon Division, PCC, 01536, North Grafton, MA

    T. E. Howson (Chief Technologist-Forgings)

  5. Boeing Commercial Airplane Group, 98124, Seattle, WA

    R. R. Boyer (Technical Fellow)

  6. Lockheed Martin Aeronautical Systems, 30063, Marietta, GA

    D. J. Chellman (Technical Fellow, Advanced Structures and Materials Division)

Authors
  1. S. L. Semiatin
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. P. A. Kobryn
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. E. D. Roush
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. D. J. Furrer
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. T. E. Howson
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. R. R. Boyer
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. D. J. Chellman
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Semiatin, S.L., Kobryn, P.A., Roush, E.D. et al. Plastic flow and microstructure evolution during thermomechanical processing of laser-deposited Ti-6Al-4V preforms. Metall Mater Trans A 32, 1801–1811 (2001). https://doi.org/10.1007/s11661-001-0156-0

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11661-001-0156-0

Keywords

Search

Navigation