Ulf Ackelid 🇸🇪’s Post

New Journal Article https://lnkd.in/gsxM-AQP Our recent study on microstructure heterogeneity in INCONEL 625 thin-wall fabricated has now been published. In this study, a new mechanism for the formation of precipitates during multi-layer additive manufacturing and the dependency of the mechanical properties on the type and distribution of these precipitates are discussed. Congratulations Pardis Mohammadpour on this great contribution, and co-authors Zhen Li and Hui Yuan.

Microstructure and mechanical properties of bulk NiTi shape memory alloy fabricated using directed energy deposition: In our article just published in Additive Manufacturing (Elsevier), we report the fabrication of large NiTi square bars by directed energy deposition (DED) X-ray diffraction detected only the B2 phase in the bottom, center and top sections. A surprising mechanical behavior is reported, for the first time, where the middle section exhibits the lowest Young’s and shear moduli (based on an ultrasonic pulse-echo test) and the highest microhardness. Atom probe tomography (APT) allowed to rationalize the anomalous mechanical behavior based on the formation of a fine dispersion of Ni4Ti3 nanoprecipitates with the highest volume fraction in the middle section. These microstructural and mechanical heterogeneities have both fundamental and practical implications.

The article “Systematic Investigation of Performance and Productivity in Laser Powder Bed Fusion of Ti6Al4V up to 300 µm Layer Thickness” is now available in the Journal of 𝐌𝐚𝐭𝐞𝐫𝐢𝐚𝐥𝐬 𝐏𝐫𝐨𝐜𝐞𝐬𝐬𝐢𝐧𝐠 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 (open access link: https://lnkd.in/gf_sfcUH). In this paper, the authors examine how an increase in layer thickness affects microstructure, mechanical properties, relative density, and overall productivity of Ti6Al4V components manufactured by laser powder bed fusion. In contrast to the conventional range of layer thickness, typically from 20 µm to 60 µm, this study systematically investigates process-property-relationships for powder layers between 60 µm and 300 µm thickness. The findings underline the effectivity of increased layer thickness to improve productivity in laser powder bed fusion while maintaining high levels of relative density and strength. The research pushes the boundaries of processability and productivity for laser powder bed fusion, enabling more rapid fabrication of high-quality Ti6Al4V components for applications in the medical, defence, and aerospace sectors. Congratulations to all the authors Simon Brudler, Alexander Medvedev, C. Pandelidi, S. Piegert, T. Illston, Ma Qian and Milan Brandt on their wonderful work. 👏 🌺 #additivemanufacturing #3dprinting #RCAM #powderbedfusion #rmituniversity

Evaluation of microstructure heterogeneity in INCONEL 625 thin-wall fabricated by Laser Powder Bed Fusion additive manufacturing https://lnkd.in/gnzqwcUe

📢 Hot news: Next patent for ATO granted in the USA! 🇺🇸 We are excited to announce that 3D Lab has secured another patent, this time in the USA, for our metal atomization technology: "Method and device for producing heavy metal powders by ultrasonic atomization." This method allows us to produce spherical metal powders, a crucial material for several industrial applications, including additive manufacturing, powder metallurgy, and special-purpose coatings. The patented process uses ultrasonic vibrations to atomize molten metal, ensuring high efficiency, premium powder quality, and minimal material loss—overcoming the limitations of traditional methods. 🌍 This marks the next granted patent from our series of submitted innovations, further solidifying our leadership in ultrasonic metal atomization technology. This patented method, used in our ATO series of ultrasonic metal atomizers, produces high-quality spherical metal powders with control over particle size, excellent flowability, and low oxygen content — ideal for #AdditiveManufacturing and other applications. Our journey of innovation continues, and this latest success reflects the hard work and dedication of our R&D Team. Stay tuned as we keep pushing the boundaries of metal powder production technology! 🔍 Browse ATO Technology patents at https://lnkd.in/d4d_Xm3Z #Innovation #3DPrinting #PowderMetallurgy #UltrasonicAtomization

We are excited to share another fantastic publication from our centre! The article titled "Novel Bainitic Ti Alloys Designed for Additive Manufacturing" is now available in the Journal of 𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹𝘀 𝗮𝗻𝗱 𝗗𝗲𝘀𝗶𝗴𝗻. The authors have investigated a viable method to fabricate structural components with unique and excellent properties using low-cost elemental powders with additive manufacturing (#AM). New ternary titanium alloys with a bainitic microstructure have been specifically engineered for additive manufacturing (#AM). The Ti-xCu-yFe alloys utilize constitutional supercooling to prevent the formation of large columnar grains, which are commonly seen in AM titanium alloys. In their as-built state, the bainitic microstructure features a refined α-phase within a β-phase matrix.The intermetallic phase, Ti₂Cu, primarily forms at the interface between the α- and β-phases and within the β matrix. The high strength of these materials is due to the refined α-phase, Ti₂Cu particles, and substantial solid solution hardening. Congratulations to all authors, Ryan Brooke, Duyao Zhang, Dong Qiu, Mark A. Gibson, Edwin L.H. Mayes, Tomáš Moravek, Nithin Balaji V.I.C., Narendraraj Chandran, Rajarshi Banerjee, and Mark Easton, on their outstanding work. 🌺 Find more here: https://lnkd.in/gr4ukDV2 #additivemanufacturing #3dprinting #reserach #RCAM #rmituniversity

[New Review Paper on #IJEM with IF 14.7] High-strength #aluminum (Al) alloys have been widely used in frontier fields like aerospace and automotive industries, but laser-directed energy deposition (LDED) #additivemanufacturing Al alloys is challenging. With more than 30,000 words, this review explained the underlying reasons for the poor printability of Al alloys and offered strategies to improve printability in LDED Al alloys. The underlying correlations between processes, alloy innovation, characteristic microstructures, and achievable performances in LDED Al alloys are discussed. The benchmark mechanical properties of LDED Al alloys are summarized. Future opportunities and perspectives in LDED high-performance Al alloys are also outlined. #metal3dprinting #metaladditivemanufacturing #metallurgy #SIMTech

Cobalt-chromium wheel Additive manufacturing is the ideal process for producing complex geometries, even in specific alloys. #3dprecision #additivemanufacturing #3dprinting #metal3dprinting

Cobalt-chromium wheel Additive manufacturing is the ideal process for producing complex geometries, even in specific alloys. #3dprecision #additivemanufacturing #3dprinting #metal3dprinting

In laser powder bed fusion (PBF-LB) additive manufacturing (AM), a focused laser beam is the fundamental tool used to selectively melt metal powder layer-upon-layer to form a 3-dimensional part. Ever wondered what is the impact of where the laser focal point is actually positioned in relation to the nominal laser-material interaction plane? Or how large of a focus shift (caused by for example dirt in or degradation of the optics and the subsequent thermal lensing) from the nominal is acceptable before part quality is compromised? Furthermore, could we utilize co-axial photodiode-based melt pool monitoring to capture the changes at the melt pool caused by focus shift during production real-time? Check out our latest open access publication on the topic to find out! https://lnkd.in/dUYv_ruZ #additivemanufacturing #3dprinting #quality #processmonitoring #vttbeyondtheobvious #universityofturku