Powder Bed Fusion (PBF), auch als Selektives Lasersintern (SLS) bezeichnet, ist eine Technologie zum schichtweisen Aufbau von 3D-Objekten, bei der ein Laserstrahl selektiv über einen vordefinierten Bereich der Pulverschicht fährt. Eines der dabei am häufigsten verwendeten Materialien ist PA12.
Powder Bed Fusion (PBF), also called Selective Laser Sintering (SLS), is the layer-by-layer construction technology of 3D objects, where a laser beam selectively traces over a predefined area on the powder layer. One of the most widely used materials is PA12.
In Powder bed fusion there is no flow and no shear rate. For powder coalescence, the local molecular motions and entanglements across the layers are important. So today, Dr. Natalie Rudolph will be focusing on the rotational rheometry.
Today, Dr. Natalie Rudolph will talk about the refreshing strategy for Powder Bed Fusion powders using Differential Scanning Calorimetry. In this episode, not the part properties, but the properties of the powder will be investigated.
Today, Dr. Natalie Rudolph will explain how the thermal diffusivity of a powder bed fusion part can be measured using Laser Flash Analysis (LFA) and how it can be computed in thermal conductivity.
Residual stress can lead to warpage of a 3D-printed part. Both Dynamic Mechanical and Thermomechanical Analysis are capable to estimate warpage. In this video, Dr. Natalie Rudolph explains, how the coefficient of thermal expansion (CTE), measured with Thermomechanical Analysis, can be used to predict and calculate warpage.
In our last episodes, we focused mainly on thermal material behavior measured with Differential Scanning Calorimetry (DSC). Today, Dr. Nathalie Rudolph will talk about how residual stresses can be estimated using Dynamic Mechanical Analysis (DMA).
In our previous episode, Dr. Natalie Rudolph informed about the isothermal measurements and their importance for process simulation. Today, we talk about measuring the specific heat capacity of Powder Bed Fusion Powder and what it is needed for.
Additive Manufacturing (AM) or 3D printing has matured over the last decades and has become a constant in our product design and development cycles and is debuting in more and more new products. At NETZSCH Analyzing & Testing, we see more and more customers in the field of Additive Manufacturing using our equipment to select materials and optimize their processes. Learn more about Additive Manufacturing in our articles and videos!
In 2020, we started our “Material Science in Additive Manufacturing” video series as we faced an increasing interest from the industry to perfect their 3D printing processes and outcomes. First, we focused on understanding the 7 different Additive Manufacturing (AM) technologies. In the advanced section, we will dive deeper and look at the underlying material science as well as the methods suitable to analyze the materials and to optimize processes