K
Kai Zweiacker
Researcher at Swiss Federal Laboratories for Materials Science and Technology
Publications - 22
Citations - 599
Kai Zweiacker is an academic researcher from Swiss Federal Laboratories for Materials Science and Technology. The author has contributed to research in topics: Microstructure & Eutectic system. The author has an hindex of 10, co-authored 21 publications receiving 394 citations. Previous affiliations of Kai Zweiacker include University of Pittsburgh.
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Journal ArticleDOI
Gradient nanostructure and residual stresses induced by Ultrasonic Nano-crystal Surface Modification in 304 austenitic stainless steel for high strength and high ductility
Chang Ye,Abhishek Telang,Amrinder S. Gill,Sergey Suslov,Yaakov Idell,Kai Zweiacker,Jörg M.K. Wiezorek,Zhong Zhou,Dong Qian,Seetha R. Mannava,Vijay K. Vasudevan +10 more
TL;DR: In this paper, the effects of ultrasonic nano-crystal surface modification (UNSM) on residual stresses, microstructure changes and mechanical properties of austenitic stainless steel 304 were investigated.
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In situ transmission electron microscopy of crystal growth-mode transitions during rapid solidification of a hypoeutectic Al–Cu alloy
Joseph T. McKeown,Andreas Kulovits,Can Liu,Kai Zweiacker,Bryan W. Reed,Thomas LaGrange,Jörg M.K. Wiezorek,Geoffrey H. Campbell +7 more
TL;DR: In this article, a pulsed-laser-melted hypoeutectic Al-Cu thin-film alloy was monitored using in situ transmission electron microscopy with high spatial and temporal resolutions.
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Combining alloy and process modification for micro-crack mitigation in an additively manufactured Ni-base superalloy
Seth Griffiths,H. Ghasemi Tabasi,Toni Ivas,Xavier Maeder,A. De Luca,Kai Zweiacker,Rafal Wrobel,Jamasp Jhabvala,Roland E. Logé,Christian Leinenbach +9 more
TL;DR: In this article, the authors demonstrate the importance of both processing conditions and alloy chemistry on micro-cracking in L-PBF fabricated γ` hardening Ni-base superalloys.
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Time-Resolved In Situ Measurements During Rapid Alloy Solidification: Experimental Insight for Additive Manufacturing
Joseph T. McKeown,Kai Zweiacker,Can Liu,D.R. Coughlin,Amy J. Clarke,J. Kevin Baldwin,John W. Gibbs,John D. Roehling,Seth D. Imhoff,Paul J. Gibbs,Damien Tourret,Jörg M.K. Wiezorek,Geoffrey H. Campbell +12 more
TL;DR: In this article, in situ investigations of rapid alloy solidification with high spatial and temporal resolutions can provide unique experimental insight into microstructure evolution and kinetics that are relevant for additive manufacturing (AM) processing.
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Interface velocity dependent solute trapping and phase selection during rapid solidification of laser melted hypo-eutectic Al-11at.%Cu alloy
Vishwanadh Bathula,Vishwanadh Bathula,Can Liu,Kai Zweiacker,Kai Zweiacker,Joseph T. McKeown,Jörg M.K. Wiezorek +6 more
TL;DR: In this paper, the evolution of the solid-liquid-interface velocity, VSL, during the solidification process has been determined from direct observation by in-situ TEM.