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Leitner, Harald
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Topics
Publications (14/14 displayed)
- 2023Influence of platform preheating on in situ precipitation in an FeCoMo alloy during laser powder bed fusioncitations
- 2022Potential Causes for Cracking of a Laser Powder Bed Fused Carbon-free FeCoMo Alloycitations
- 2022Cracking mechanism in a laser powder bed fused cold-work tool steelcitations
- 2022Cracking mechanism in a laser powder bed fused cold-work tool steel: The role of residual stresses, microstructure and local elemental concentrationscitations
- 2022Local microstructural evolution and the role of residual stresses in the phase stability of a laser powder bed fused cold-work tool steelcitations
- 2021Influence of thermomechanical fatigue loading conditions on the nanostructure of secondary hardening steelscitations
- 2020METHOD FOR PRODUCING AN ARTICLE FROM A MARAGING STEEL
- 2020Defects in a laser powder bed fused tool steelcitations
- 2020Determination of Martensite Start Temperature of High‐Speed Steels Based on Thermodynamic Calculationscitations
- 2019Microstructural evolution of a dual hardening steel during heat treatmentcitations
- 2019VERFAHREN ZUM HERSTELLEN EINES GEGENSTANDS AUS EINEM MARAGING-STAHL
- 2019Thermomechanical fatigue testing of dual hardening tool steelscitations
- 2017The potential for grain refinement of a super austenitic stainless steel with a cerium grain refiner
- 2008δ-phase characterization of superalloy Allvac 718 Plus™
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article
Influence of platform preheating on in situ precipitation in an FeCoMo alloy during laser powder bed fusion
Abstract
<p>The nanostructure of a laser powder bed fused (LPBF) FeCoMo maraging alloy was investigated with atom probe tomography (APT). Two as-built conditions were examined: without platform preheating and with a nominal platform preheating temperature T<sub>P</sub>=500°C. The results showed that the martensite start temperature of the FeCoMo alloy is lower than T<sub>P</sub> and the intermetallic strengthening μ-phase precipitates from the martensite phase and not from the austenite phase. By comparing the μ-phase precipitation stages in the specimens, a model for the temperature distribution during LPBF with T<sub>P</sub>=500°C was proposed. It was concluded that the platform surface did not attain the nominal preheating temperature and that the temperature in the built part decreased with increasing distance from the platform. Intrinsic heat treatment (IHT) during LPBF alone did not provide sufficient energy (temperature and/or time) for μ-phase precipitation.</p>