Abstract
The paper deals with the evaluation of mechanical properties of 3D-printed samples based on high-strength steel powder system maraging steel using direct metal laser sintering (DMLS), which is currently being put into technical practice. The novelty of this article is that it analyzes mechanical properties of samples both printed and age hardened as well as examining the fracture surfaces. When comparing the manufacturer’s range with our recorded values, samples from Set 1 demonstrated strength ranging from 1110 to ultimate 1140 MPa. Samples from Set 2 showed tensile strength values that were just below average. Our recorded range was from 1920 to ultimate 2000 MPa while the manufacturer reported a range from 1950 to 2150 MPa. The tensile strength was in the range from 841 to ultimate 852 MPa in Set 1, and from 1110 to ultimate 1130 MPa in Set 2.
Highlights
The idea of transforming the innovative production processes from a prototype into serial production has recently become increasingly popular for many manufacturers
The tests dealt with research of mechanical properties of the 3D-printed samples based on high-strength steel powder system Ti6Al4V maraging steel using direct metal laser sintering (DMLS), which is currently being put into technical practice
Tested samples were obtained by direct metal laser sintering with 3D printing in additive technologies
Summary
The idea of transforming the innovative production processes from a prototype into serial production has recently become increasingly popular for many manufacturers. GmbH (Electro-Optical Systems) is the global technology and quality leader for high-end solutions in the field of additive manufacturing (AM) and a global player in the field of direct metal laser sintering (DMLS). Rapid Product Innovations (RPI) and EOS GmbH, (Electro-Optical Systems) starting in 1994 as the first commercial rapid prototyping method to produce metal parts in a single process. In addition to functional prototypes, components made by DMLS are often used for rapid tool making, medical implants, aerospace parts, and components for high-temperature environments. In DMLS technology, metal powder of 20 microns, free of binder or fluxing agent, is completely melted by scanning using a high-performance laser beam to form a part with original material properties. Elimination of the polymeric binder avoids the burn-off and infiltration steps and produces 95% dense steel compared to about 70% density with selective laser sintering (SLS) [1,2,3,4,5,6,7,8,9,10]
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