کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5368650 | 1388404 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Densification behavior of gas and water atomized 316L stainless steel powder during selective laser melting Densification behavior of gas and water atomized 316L stainless steel powder during selective laser melting](/preview/png/5368650.png)
The densification during selective laser melting (SLM) process is an important factor determining the final application of SLM-part. In the present work, the densifications under different processing conditions were investigated and the densification mechanisms were elucidated. It was found that the higher laser power, lower scan speed, narrower hatch spacing and thinner layer thickness could enable a much smoother melting surface and consequently a higher densification.The gas atomized powder possessed better densification than water atomized powder, due to the lower oxygen content and higher packing density of gas atomized powder. A large number of regular-shaped pores can be generated at a wider hatch spacing, even if the scanning track is continuous and wetted very well. The densification mechanisms were addressed and the methods for building dense metal parts were also proposed as follows: inhibiting the balling phenomenon, increasing the overlap ratio of scanning tracks and reducing the micro-cracks.
Journal: Applied Surface Science - Volume 256, Issue 13, 15 April 2010, Pages 4350-4356