Densification behavior of gas and water atomized 316L stainless steel powder during selective laser melting

2010 ◽  
Vol 256 (13) ◽  
pp. 4350-4356 ◽  
Author(s):  
Ruidi Li ◽  
Yusheng Shi ◽  
Zhigang Wang ◽  
Li Wang ◽  
Jinhui Liu ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Selective Laser Melting ◽  
316L Stainless Steel ◽  
Steel Powder ◽  
Stainless Steel Powder ◽  
Densification Behavior ◽  
Laser Melting

Effects of Powder Characteristics on Selective Laser Melting of 316L Stainless Steel Powder

2011 ◽  
Vol 189-193 ◽  
pp. 3664-3667 ◽  
Author(s):  
Sheng Zhang ◽  
Qing Song Wei ◽  
Guang Ke Lin ◽  
Xiao Zhao ◽  
Yu Sheng Shi
Keyword(s):  
Stainless Steel ◽  
Selective Laser Melting ◽  
316L Stainless Steel ◽  
Fine Powder ◽  
Steel Powder ◽  
Laser Melting ◽  
Broad Size Distribution ◽  
Lower Oxygen ◽  
Powder Characteristics ◽  
Loose Powder

316L stainless steel parts were manufactured via selective laser melting . This work stu- dies the effects of powder characteristics such as particle size and particle shape composition on the density. It shows that the powder with a broad size distribution and using spherical fine powder can lead to an increase in the density of the loose powder and thus the densification of the laser melted powder. The aerosol powder forms parts of lower oxygen content well, and the density can reach to 90%.

Characterization of laser spatter and condensate generated during the selective laser melting of 304L stainless steel powder

2020 ◽  
Vol 31 ◽  
pp. 100904 ◽  
Author(s):  
Austin T. Sutton ◽  
Caitlin S. Kriewall ◽  
Ming C. Leu ◽  
Joseph W. Newkirk ◽  
Ben Brown
Keyword(s):  
Stainless Steel ◽  
Selective Laser Melting ◽  
Steel Powder ◽  
Stainless Steel Powder ◽  
304L Stainless Steel ◽  
Laser Melting

Water Atomized 17-4 PH Stainless Steel Powder as a Cheaper Alternative Powder Feedstock for Selective Laser Melting

2018 ◽  
Vol 941 ◽  
pp. 698-703 ◽  
Author(s):  
Milad Ghayoor ◽  
Sunil B. Badwe ◽  
Harish Irrinki ◽  
Sundar V. Atre ◽  
Somayeh Pasebani
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Stainless Steel ◽  
Selective Laser Melting ◽  
Steel Powder ◽  
Melting Process ◽  
Stainless Steel Powder ◽  
Laser Melting ◽  
Austenitic Phase ◽  
Process Gas

Water atomized and gas atomized 17-4 PH stainless steel powder were used as feedstock in selective laser melting process. Gas atomized powder revealed single martensitic phase after printing and heat treatment. As-printed water atomized powder contained dual martensitic and austenitic phase. The H900 heat treatment cycle was not effective in enhancing mechanical properties of the water atomized powder after laser melting. However, after solutionizing at 1315 oC and aging at 482oC fully martensitic structure was observed with yield strength of 1000 MPa and ultimate tensile strength of 1261 MPa which are comparable to those of gas atomized, 1254 MPa and 1300 MPa, respectively. Improved mechanical properties in water atomized powder was found to be related to presence of finer martensite. Our results imply that water atomized powder is a promising cheaper feedstock alternative to gas atomized powder.

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