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Freeform Fabrication of High Performance Titanium Components via SLS/HIP

Published online by Cambridge University Press:  10 February 2011

S. Das ,
J. J. Beaman ,
M. Wohlert  and
D. L. Bourell
S. Das
Affiliation:
University of Texas at Austin, Laboratory for Freeform Fabrication, ETC 5.160 C2200, Austin, TX 78712-1063, USA.
J. J. Beaman
Affiliation:
University of Texas at Austin, Laboratory for Freeform Fabrication, ETC 5.160 C2200, Austin, TX 78712-1063, USA.
M. Wohlert
Affiliation:
University of Texas at Austin, Laboratory for Freeform Fabrication, ETC 5.160 C2200, Austin, TX 78712-1063, USA.
D. L. Bourell
Affiliation:
University of Texas at Austin, Laboratory for Freeform Fabrication, ETC 5.160 C2200, Austin, TX 78712-1063, USA.
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Abstract

This paper presents the development of Selective Laser Sintering/Hot Isostatic Pressing (SLS/HIP) technology for production of functional high performance components in the titanium alloy Ti-6AI-4V. SLS/HIP is a net shape manufacturing technique that combines and exploits the freeform shaping capability of selective laser sintering and the full densification capability of hot isostatic pressing. The advantages of SLS combined with in situ HIP encapsulation include single step net shape canning, full densification by containerless HIP, no container-powder adverse interactions, reduced pre-processing time, and minimal post-process machining compared to conventional HIP of canned powders. Microstructure and mechanical properties of SLS processed and HIP post-processed Ti-6A1-4V are consistent with conventionally processed material. The potential of SLS/HIP technology was demonstrated by net shape fabricating a component to specification, namely the titanium guidance section housing base for the AIM-9 Sidewinder missile.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 542: Symposium V – Solid Freeform and Additive Fabrication , 1998 , 45
Copyright
Copyright © Materials Research Society 1999

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References

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