It is well known that the effectiveness of 3D printing depends to a large extent on the properties of the material. Recently, scientists at the Oak Ridge National Laboratory (ORNL) under the US Department of Energy are using an innovative technology to reveal more of the characteristics of 3D printed materials . They used infrared cameras to capture the various components of 3D printing to learn more about how processing conditions affect the strength, residual stress, and microstructure of these 3D printed objects.
According to scientists at the agency, in fact, ORNL has been using infrared cameras to research promising technology applications for decades. As early as 1995, they were the first non-military organization in the United States to apply high-speed infrared cameras and used the equipment in continuous fiber ceramic composite projects. At the time, it gave researchers a better understanding of the thermal conductivity of this material, which greatly helped to develop this lightweight and strong ceramic composite. Scientists hope that this time the device will also play a similar role in 3D printing technology , so they used at least 10 new high-speed infrared cameras to study various 3D printing materials, especially for mapping objects. temperature change.
It is understood that a considerable part of the current work of scientists is based on their successful infrared research, which has proven to be of high value. “At first we just planned to use this camera to measure the thermal diffusivity map of composite materials.†Ralph Dinwiddie said that he was involved in the ceramic composite project 20 years ago. “This will allow us to measure the performance of its constituents and study what happens to them after changing processing conditions.†This method of infrared imaging has become a new way to study composites. “These information about the nature of the constituents allows us to better simulate future composites,†adds Dinwiddie.
Using this infrared camera to detect defects under the surface of the material allows scientists to study the material without destroying the sample. It can reveal hidden corrosion, manufacturing defects, and even incomplete fusion between layers in 3D printed samples. As early as the 1990s, this technology has been used to optimize gas turbines and has been used to accelerate engineering research for years. It is understood that in this project, scientists will combine attribute mapping, temperature mapping, non-destructive testing, microscopic temperature measurement and process monitoring to provide a comprehensive and in-depth understanding of the series of changes in materials during 3D printing.
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