Microstructural banding of directed energy deposition-additively manufactured 316L stainless steel
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第10期
论文作者：Yoon Hwa Christopher S.Kumai Thomas M.Devine Nancy Yang Joshua K.Yee Ryan Hardwick Kai Burgmann
文章页码：96 - 105
摘 要：The microstructures of 316L stainless steel created by rapid solidification are investigated by comparing the similar microstructures of individual hatches of directed energy deposition additive manufacturing（DED-AM） and those of single, laser surface-melted tracks formed on a solid plate. High recoil pressure,which is exponentially dependent on the laser beam power density, induces convection of the melt pool,which causes formation of microstructural bands in the as-solidified microstructure. The microstructural bands are associated with changes in the chromium concentration and are a significant component of the inhomogeneous microstructure of DED-AM.
Yoon Hwa1，Christopher S.Kumai1，Thomas M.Devine1，Nancy Yang2，Joshua K.Yee2，Ryan Hardwick2，Kai Burgmann2
1. Department of Materials Science and Engineering, University of California2. Sandia National Laboratory
摘 要：The microstructures of 316L stainless steel created by rapid solidification are investigated by comparing the similar microstructures of individual hatches of directed energy deposition additive manufacturing（DED-AM） and those of single, laser surface-melted tracks formed on a solid plate. High recoil pressure,which is exponentially dependent on the laser beam power density, induces convection of the melt pool,which causes formation of microstructural bands in the as-solidified microstructure. The microstructural bands are associated with changes in the chromium concentration and are a significant component of the inhomogeneous microstructure of DED-AM.
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