Book ChapterDOI
Microstructural Observations of 316L Stainless Steel Laser Powder Depositions
Santhosh K. Koduri,Eric Henderson,Aaron Costello,James W. Sears +3 more
- pp 229-238
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The article was published on 2014-06-17. It has received 1 citations till now. The article focuses on the topics: Gas porosity & Microstructure.read more
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Journal ArticleDOI
Solidification behaviour of austenitic stainless steels during welding and directed energy deposition
Abstract: The effect of cooling rate on the solidification behaviour of austenitic stainless steels during high energy density welding and directed energy deposition (DED) has been reviewed. Precedent studies demonstrated the confinement of austenite–ferrite duplex region and the susceptibility of specific alloy compositions on the Schaeffler diagram to alteration of solidification mode at high cooling rates during the high energy density welding. Meanwhile, mitigated cooling conditions have dominated during the DED process. The instances of microstructural fluctuations owing to cooling rate variation have been compiled. The incorporation of DED steels into the implicated Schaeffler diagrams demonstrated reliable predictions at high cooling rates. The printability of austenitic stainless steels during the DED process has been discussed in terms of solidification cracking susceptibility.
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Journal ArticleDOI
Practical considerations and capabilities for laser assisted direct metal deposition
G.K. Lewis,M. Eric Schlienger +1 more
TL;DR: Directed light fabrication (DLF) and laser engineered net shaping (LENS TM ) processes have been proven feasible for fabricating components from nearly any metal system to near-net shape accuracy with mechanical properties approaching and in some cases exceeding the properties found in conventional processed wrought structures.
Journal ArticleDOI
Microstructural development during solidification of stainless steel alloys
TL;DR: In this article, the influence of cooling rate on the microstructure of stainless steel alloys was investigated and the conditions that lead to the many microstructural morphologies that develop during solidification.
Journal ArticleDOI
The effect of laser power and traverse speed on microstructure, porosity, and build height in laser-deposited Ti-6Al-4V
Journal ArticleDOI
Austenitic solidification mode in austenitic stainless steel welds
T. Takalo,N. Suutala,T. Moisio +2 more
TL;DR: In this article, the micro-and macrostructures of about 50 different stainless welds of the AISI/AWS 300 series were analyzed and the results indicated that in welding condition corresponding to a typical SMA welding those and only those welds in which the ratio Creq/Nieq≲1.48, where Nieq and Creq are the nickel and chromium equivalents on the Schaeffler diagram, solidify with the austenite as the primary or leading phase and the delta ferrite, if any, formed from the rest melt between
Journal ArticleDOI
The solidification sequence in an 18-8 stainless steel, investigated by directional solidification
TL;DR: In this paper, the authors applied the directional solidification technique to investigate the complicated solidification sequence in a commercial austenitic stainless steel which was known to yield a primary precipitation of § ferrite when cast into a 5 tons ingot.