Search Results - "Adomako, Nana Kwabena"

Electron and laser-based additive manufacturing of Ni-based superalloys: A review of heterogeneities in microstructure and mechanical properties by Kwabena Adomako, Nana, Haghdadi, Nima, Primig, Sophie

“…[Display omitted] •The heterogeneities in the microstructure and mechanical properties of AM Ni-based superalloys are reviewed.•The origins of heterogeneities…”
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Finite Element Modeling of Residual Stress at Joint Interface of Titanium Alloy and 17-4PH Stainless Steel by Kwabena Adomako, Nana, Kim, Sung Hoon, Yoon, Ji Hong, Lee, Se-Hwan, Kim, Jeoung Han

“…Residual stress is a crucial element in determining the integrity of parts and lifetime of additively manufactured structures. In stainless steel and Ti-6Al-4V…”
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Additive manufacturing of Ti-6Al-4V/V-interlayer/17-PH steel functionally graded material using angular and spheroidal V powders by Woong Park, Chan, Narayan Hajra, Raj, Kwabena Adomako, Nana, Choo, Woong, Yang, Seung-Min, Seo, Seok-Jun, Kim, Jeoung Han

“…[Display omitted] •V powder was spheroidized through radio-frequency thermal-plasma process.•Flowability of fine spherical powder improved additive…”
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On the role of the preheat temperature in electron-beam powder bed fusion processed IN718 by Adomako, Nana Kwabena, Haines, Michael, Haghdadi, Nima, Primig, Sophie

“…•Slight preheat temperature variation (1000 vs. 950°C) impact hardness in E-PBF IN718.•50°C difference significantly impacts solid-state microstructure…”
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Microstructural evolution and mechanical properties of functionally graded austenitic–low-carbon steel produced via directed energy deposition by Shin, Giseung, Ebrahimian, Marzieh, Adomako, Nana Kwabena, Choi, Haneul, Lee, Dong Jun, Yoon, Ji-Hyun, Kim, Dae Whan, Kang, Jun-Yun, Na, Min Young, Chang, Hye Jung, Kim, Jeoung Han

“…[Display omitted] •The joining of functionally graded low carbon-austenite steels was successfully accomplished.•Although C and Cr coexisted in the middle…”
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Advancing the understanding of metal additive manufacturing via physical simulation and in situ transmission electron microscopy: a viewpoint by Adomako, Nana Kwabena, Haghdadi, Nima, Primig, Sophie

“…The complex microstructure evolution and heterogeneities in metal additive manufacturing (AM) continue to delay the adoption of AM parts by additional…”
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Microstructure and mechanical properties of dissimilar laser lap joint between CoCrFeMnNi-high entropy alloy and duplex stainless steel by Adomako, Nana Kwabena, Kim, Jeoung Han

“…[Display omitted] •Dissimilar lap joint between CoCrFeMnNi and duplex stainless steel was studied.•Weld showed different microstructure morphology and hardness…”
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Laser deposition additive manufacturing of 17-4PH stainless steel on Ti-6Al-4V using V interlayer by Adomako, Nana Kwabena, Noh, Sanghoon, Oh, Chang-Seok, Yang, Sangsun, Kim, Jeoung Han

“…For the first time, additive manufacturing was used to obtain a strong joint (bonding strength >200 MPa) between stainless steel and Ti-6Al-4V using a V…”
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Laser dissimilar welding of CoCrFeMnNi-high entropy alloy and duplex stainless steel by Adomako, Nana Kwabena, Shin, Giseung, Park, Nokeun, Park, Kyoungtae, Kim, Jeoung Han

“…High entropy alloys (HEAs) have superior mechanical properties that have enabled them to be used as structural materials in nuclear and aerospace applications…”
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Thermal cycle induced solid-state phase evolution in IN718 during additive manufacturing: A physical simulation study by Adomako, Nana Kwabena, Haghdadi, Nima, Liao, Xiaozhou, Ringer, Simon P., Primig, Sophie

“…Additive manufacturing (AM) is well-known for its capability to produce and repair intricate parts e.g., Ni-based superalloy components used in aero-engine…”
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Microstructure evolution and mechanical properties of the dissimilar joint between IN718 and STS304 by Adomako, Nana Kwabena, Park, Heon Joon, Cha, Sung Chul, Lee, Mokyoung, Kim, Jeoung Han

“…Modern fuel injectors for gasoline, diesel, and gaseous fuel use dissimilar joints of Inconel 718 and STS 304. To better understand the microstructural…”
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Microstructural evolution and mechanical properties of laser beam welded joints between pure V and 17-4PH stainless steel by Adomako, Nana Kwabena, Kim, Jeng O., Kim, Jeoung Han

“…The microstructures and mechanical properties of joints between 17-4PH stainless steel and pure V were investigated. During laser welding of these joints, the…”
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High-temperature oxidation behaviour of low-entropy alloy to medium- and high-entropy alloys by Adomako, Nana Kwabena, Kim, Jeoung Han, Hyun, Yong Taek

“…The high-temperature oxidation behaviour of CoCrNi, CoCrNiMn, and CoCrNiMnFe equimolar alloys was investigated. All three alloys have a single-phase…”
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Dissimilar welding between Ti–6Al–4V and 17-4PH stainless steel using a vanadium interlayer by Adomako, Nana Kwabena, Kim, Jeng O., Lee, Se Hwan, Noh, Kyung-Ho, Kim, Jeoung Han

“…In this study, electron beam welding, continuous laser welding, and pulsed laser welding were used to join Ti–6Al–4V alloy and 17-4PH stainless steel with a…”
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Interfacial structure and pore formation mechanism during laser cladding of pure vanadium on Ti-6Al-4V alloy by Park, Chan Woong, Adomako, Nana Kwabena, Lee, Min Gyu, Kim, Jae Hyeok, Kim, Jeoung Han

“…The interfacial structure and pore formation mechanism of V, which was laser cladded under various conditions with 17-4PH alloys on a Ti-6Al-4V plate, were…”
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Microstructures and mechanical properties of multi-layered materials composed of Ti-6Al-4V, vanadium, and 17–4PH stainless steel produced by directed energy deposition by Adomako, Nana Kwabena, Lewandowski, John J., Arkhurst, Barton Mensah, Choi, Haneul, Chang, Hye Jung, Kim, Jeoung Han

“…The joining of dissimilar Ti alloy and stainless steel (SS) is challenging but necessary for the extensive applications of Ti alloy/SS hybrid materials…”
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Predicting solid-state phase transformations during metal additive manufacturing: A case study on electron-beam powder bed fusion of Inconel-738 by Adomako, Nana Kwabena, Haghdadi, Nima, Dingle, James F.L., Kozeschnik, Ernst, Liao, Xiaozhou, Ringer, Simon P., Primig, Sophie

“…Metal additive manufacturing (AM) has now become the perhaps most desirable technique for producing complex shaped engineering parts. However, to truly take…”
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Laser deposition additive manufacturing of 17-4PH stainless steel on Ti-6Al-4V using V interlayer by Adomako, Nana Kwabena, Noh, Sanghoon, Oh, Chang-Seok, Yang, Sangsun, Kim, Jeoung Han

“…For the first time, additive manufacturing was used to obtain a strong joint (bonding strength >200 MPa) between stainless steel and Ti-6Al-4V using a V…”
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