Skip to main content Accessibility help
×
Home

Directed Light Fabrication of Iron-Based Materials

  • D.J. Thoma (a1), C. Charbon (a1), G.K. Lewis (a1) and R.B. Nemec (a1)

Abstract

Directed light fabrication (DLP) is a rapid fabrication process that fuses gas delivered metal powders within a focal zone of a laser beam to produce fully dense, near-net shape, 3-dimensional metal components from a computer generated solid model. This study used iron-based alloys to evaluate the microstructural development in the DLF process. Continuous microstructural features are evident, implying a continuous liquid/solid interface during processing. In addition, solidification cooling rates have been determined based upon secondary dendrite arm spacings in Fe-25wt.%Ni and 316 stainless steel. Cooling rates vary from 101-105 K s-1, and the solidification behavior has been simulated using macroscopic heat transfer analyses.

Copyright

References

Hide All
1 Lewis, G.K., Nemec, R.B., Milewski, J.O., Thoma, D.J., Barbe, M., and Cremers, D., Proc. ICALEO (LIA, Orlando, FL) p. 17 (1994).
2 Thoma, D.J., Lewis, G.K., and Nemec, R.B., in Beam Processing of Advanced Materials, Singh, J., ed. (ASM, Materials Park, OH) (1996).
3 Rappaz, M., Int. Mat. Reviews, 34 p. 93 (1989).
4 Kurz, W., and Fisher, D.J., Fundamentals of Solidification, 3rd ed., (Trans Tech Publications, VT) (1989).
5 Brower, W.E. Jr., Strachan, R., and Flemings, M.C., AFS Cast Metals Research Journal, Dec., p. 176(1970).
6 Katayama, S., and Matsunawa, A., Proc. ICALEO, (LIA, Orlando, FL) p. 60 (1984).
7 Elmer, J.W., Allen, S.M., and Eagar, T.W., Metall. Trans. A, 20A, p. 2117, (1989).
8 Zhao, Q., Piccone, T.J., Shiohara, Y., and Flemings, M.C., Proc. MRS Int. Meeting on Advanced Materials, vol. 3, (MRS, Pittsburgh, PA) p. 597 (1989).
9 ASM Handbook 9th ed. vol. 1, (ASM, , OH) (1990).

Directed Light Fabrication of Iron-Based Materials

  • D.J. Thoma (a1), C. Charbon (a1), G.K. Lewis (a1) and R.B. Nemec (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed