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Energy-saving gas turbines from the 3D printer

 E-Mail IMAGE: Neutrons can see through metal. Therefore neutron diffraction is an ideal method for measuring residual stress inside of components made by additive manufacturing. The image shows a lattice structure in. view more  Credit: Dr. Tobias Fritsch / BAM 3D printing has opened up a completely new range of possibilities. One example is the production of novel turbine buckets. However, the 3D printing process often induces internal stress in the components which can in the worst case lead to cracks. Now a research team has succeeded in using neutrons from the Technical University of Munich (TUM) research neutron source for non-destructive detection of this internal stress - a key achievement for the improvement of the production processes.

Scientists investigate 3D-printed high-entropy alloys

 E-Mail Scientists from the Skoltech Center for Design, Manufacturing and Materials (CDMM) and the Institute for Metals Superplasticity Problems (IMSP RAS) have studied the fatigue behavior of additive-manufactured high-entropy alloys (HEA). The research was published in the Journal of Alloys and Compounds. Conventional 20th century materials that are extensively used in industries and mechanical engineering have reached their performance limit. Nowadays, alloying is commonly used to improve the alloys mechanical performance and increase their operating temperature. An alternative to alloying, HEAs containing equal atomic fractions of their constituent elements were first obtained in 2004. Since then, various publications have offered ample evidence of excellent mechanical performance of HEAs over a broad temperature range. Most of the characteristics were demonstrated for HEAs manufactured by traditional metallurgy techniques.

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