Abstract
Selective laser sintering/hot isostatic pressing is a hybrid direct laser fabrication method that combines the strengths of both processes. Selective laser sintering can produce complexly shaped metal components with an integral, gas-impermeable skin. These components can then be directly post-processed to full density by containerless hot isostatic pressing. The use of the hybrid fabrication method, envisioned as a rapid, low-cost replacement for conventional metal-can hot isostatic pressing, is currently being studied for alloy 625 and Ti-6Al-4V alloys. The micro-structure and mechanical properties of selective-laser-sintering processed and hot isostatically pressed post-processed material compare well with those of conventionally processed material.
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References
S. Das et al., “Direct SLS Processing of Cermet Composite Turbine Sealing Components,” Materials and Manufacturing Processes, 13 (3) (1998).
M.L. Griffith et al., “Freeform Fabrication of Metallic Components Using Laser Engineered Net Shaping (LENS™),” Proc. Solid Freeform Fabrication Symposium 1996 (Austin, TX: U. of Texas, 1996).
J. Mazumder et al., “The Direct Metal Deposition of H13 Tool Steel for 3-D Components,” JOM, 49 (5) (1997), pp. 55–60.
G.K. Lewis et al., “Properties of Near-Net Shape Metallic Components Produced by the Directed Light Fabrication Process” Proc. Solid Freeform Fabrication Symposium 1997 (Austin, TX: U. of Texas, 1997).
J.R. Fessler et al., “Laser Deposition of Metals for Shape Deposition Manufacturing,” Proc. Solid Freeform Fabrication Symposium 1996 (Austin, TX: U. of Texas, 1996).
F.G. Arcella et al., “Materials Characterization of LaserCast™ Titanium,” Advances in Powder Metallurgy and Particulate Materials, part 15, 2 (1996) pp. 151–165.
S. Das et al., “Direct Selective Laser Sintering of High Performance Metals for Containerless HIP,” Advances in Powder Metallurgy and Particulate Materials, part 21, 3 (1997) pp. 67–68.
R. Knight et al., “Metal Processing Using Selective Laser Sintering and Hot Isostatic Pressing” Proc. Solid Freeform Fabrication Symposium 1994 (Austin, TX: U. of Texas, 1994).
G. Zong et al., “Direct Selective Laser Sintering of High-Temperature Materials,” Proc. Solid Freeform Fabrication Symposium (Austin, TX: U. of Texas, 1992).
D.W. Freitag et al., “Laser Directed Fabrication of Full Density Metal Articles Using Hot Isostatic Pressing,” U.S. patent 5,640,667 (1997).
R.M. German, Powder Metallurgy Science (Princeton, NJ: MPIF, 1994), p. 57.
INCONEL Alloy 625, Inco Alloys International (1985).
Metals Handbook, ninth ed., vol. 9 (Metals Park, OH: ASM, 1985), p. 466.
ASTM B-367-93, “Standard Specification for Titanium and Titanium Castings” (Philadelphia, PA: ASTM, 1993).
ASTM B 348-95a, “Standard Specification for Titanium and Titanium Alloy Bars and Billets” (Philadelphia, PA: ASTM, 1995).
Metals Handbook, ninth ed., vol. 3 (Metals Park, OH: ASM, 1993), p. 388.
R. Boyer et al., “Ti-6Al-4V,” Materials Properties Handbook: Titanium Alloys (Materials Park, OH: ASM, 1994), p. 483.
ASTM E 1409-97, “Standard Test Method for Determination of Oxygen in Titanium and Titanium Alloys by the Inert Gas Fusion Technique” (Philadelphia, PA: ASTM, 1997).
C.F. Yolton, Crucible Research, personal communication (1998).
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Editor’s Note: A hypertext-enhanced version of this paper can be found on JOM’s web site at www.tms.org/pubs/journals/JOM/9812/Das-9812.html.
Suman Das earned his M.S. in mechanical engineering at the University of Texas at Austin in 1993. He is currently a Ph.D. candidate at the same school. Mr. Das is a member of TMS
Martin Wohlert earned his M.S. in materials science and engineering at the University of Texas at Austin in 1997. He is currently a Ph.D. candidate at the same school. Mr. Wohlert is also a member of TMS.
Joseph J. Beaman earned his Sc.D. in mechanical engineering at the Massachusetts Institute of Technology in 1979. He is currently Anderson professor of manufacturing systems engineering at the University of Texas at Austin.
David L. Bourell earned his Ph.D. in materials science and engineering at Stanford University in 1979. He is currently Temple Foundation professor at the University of Texas at Austin. Dr. Bourell is also a member of TMS.
An erratum to this article is available at http://dx.doi.org/10.1007/s11837-999-0067-x.
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Das, S., Wohlert, M., Beaman, J.J. et al. Producing metal parts with selective laser sintering/hot isostatic pressing. JOM 50, 17–20 (1998). https://doi.org/10.1007/s11837-998-0299-1
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DOI: https://doi.org/10.1007/s11837-998-0299-1