Search Results - "Rollett, Anthony"

Critical instability at moving keyhole tip generates porosity in laser melting by Zhao, Cang, Parab, Niranjan D, Li, Xuxiao, Fezzaa, Kamel, Tan, Wenda, Rollett, Anthony D, Sun, Tao

“…Laser powder bed fusion is a dominant metal 3D printing technology. However, porosity defects remain a challenge for fatigue-sensitive applications. Some…”
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Keyhole threshold and morphology in laser melting revealed by ultrahigh-speed x-ray imaging by Cunningham, Ross, Zhao, Cang, Parab, Niranjan, Kantzos, Christopher, Pauza, Joseph, Fezzaa, Kamel, Sun, Tao, Rollett, Anthony D

“…We used ultrahigh-speed synchrotron x-ray imaging to quantify the phenomenon of vapor depressions (also known as keyholes) during laser melting of metals as…”
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Varied heat treatments and properties of laser powder bed printed Inconel 718 by Jiang, Runbo, Mostafaei, Amir, Pauza, Joseph, Kantzos, Christopher, Rollett, Anthony D.

“…The effects of post-build heat-treatments on the microstructure, phase formation, recrystallization behavior, and mechanical properties of laser powder bed…”
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Real-time monitoring of laser powder bed fusion process using high-speed X-ray imaging and diffraction by Zhao, Cang, Fezzaa, Kamel, Cunningham, Ross W., Wen, Haidan, De Carlo, Francesco, Chen, Lianyi, Rollett, Anthony D., Sun, Tao

“…We employ the high-speed synchrotron hard X-ray imaging and diffraction techniques to monitor the laser powder bed fusion (LPBF) process of Ti-6Al-4V in situ…”
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Machine learning-aided real-time detection of keyhole pore generation in laser powder bed fusion by Ren, Zhongshu, Gao, Lin, Clark, Samuel J, Fezzaa, Kamel, Shevchenko, Pavel, Choi, Ann, Everhart, Wes, Rollett, Anthony D, Chen, Lianyi, Sun, Tao

“…Porosity defects are currently a major factor that hinders the widespread adoption of laser-based metal additive manufacturing technologies. One common…”
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Thermodynamics-guided alloy and process design for additive manufacturing by Sun, Zhongji, Ma, Yan, Ponge, Dirk, Zaefferer, Stefan, Jägle, Eric A., Gault, Baptiste, Rollett, Anthony D., Raabe, Dierk

“…In conventional processing, metals go through multiple manufacturing steps including casting, plastic deformation, and heat treatment to achieve the desired…”
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Defects and anomalies in powder bed fusion metal additive manufacturing by Mostafaei, Amir, Zhao, Cang, He, Yining, Reza Ghiaasiaan, Seyed, Shi, Bo, Shao, Shuai, Shamsaei, Nima, Wu, Ziheng, Kouraytem, Nadia, Sun, Tao, Pauza, Joseph, Gordon, Jerard V., Webler, Bryan, Parab, Niranjan D., Asherloo, Mohammadreza, Guo, Qilin, Chen, Lianyi, Rollett, Anthony D.

“…•Common defects and anomalies in powder bed fusion metal additive manufacturing.•Formation mechanism and practical mitigation strategies are…”
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Laser melting modes in metal powder bed fusion additive manufacturing by Zhao, Cang, Shi, Bo, Chen, Shuailei, Du, Dong, Sun, Tao, Simonds, Brian J., Fezzaa, Kamel, Rollett, Anthony D.

“…In the laser powder bed fusion additive manufacturing of metals, extreme thermal conditions create many highly dynamic physical phenomena, such as vaporization…”
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High-Energy X-Ray Diffraction Microscopy in Materials Science by Bernier, Joel V, Suter, Robert M, Rollett, Anthony D, Almer, Jonathan D

“…High-energy diffraction microscopy (HEDM) is an implementation of three-dimensional X-ray diffraction microscopy. HEDM yields maps of internal crystal…”
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Plastic behavior of the α′ phase in Ti-6Al-4V alloys by Castioni, Florian, Cazottes, Sophie, Rollett, Anthony D., Dancette, Sylvain

“…•Basal and prismatic slips are the dominant deformation modes of α′ phase in TA6V.•CRSS values of alpha phase can well describe the deformation behavior of the…”
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Computer Vision and Machine Learning for Autonomous Characterization of AM Powder Feedstocks by DeCost, Brian L., Jain, Harshvardhan, Rollett, Anthony D., Holm, Elizabeth A.

“…By applying computer vision and machine learning methods, we develop a system to characterize powder feedstock materials for metal additive manufacturing (AM)…”
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Effect of microstructure on the elasto-viscoplastic deformation of dual phase titanium structures by Ozturk, Tugce, Rollett, Anthony D.

“…The present study is devoted to the creation of a process–structure–property database for dual phase titanium alloys, through a synthetic microstructure…”
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Plastic deformation mechanisms that explain hot-rolling textures in Nickel–Titanium by Sridhar, Shivram Kashyap, Stebner, Aaron P., Rollett, Anthony D.

“…Plastic deformation of B2 Nickel Titanium is usually attributed to {110}〈001〉 slip and {114}〈221〉 deformation twinning. The most commonly observed hot-worked…”
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Real time observation of binder jetting printing process using high-speed X-ray imaging by Parab, Niranjan D., Barnes, John E., Zhao, Cang, Cunningham, Ross W., Fezzaa, Kamel, Rollett, Anthony D., Sun, Tao

“…A high-speed synchrotron X-ray imaging technique was used to investigate the binder jetting additive manufacturing (AM) process. A commercial binder jetting…”
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Ultrafast X‐ray imaging of laser–metal additive manufacturing processes by Parab, Niranjan D., Zhao, Cang, Cunningham, Ross, Escano, Luis I., Fezzaa, Kamel, Everhart, Wes, Rollett, Anthony D., Chen, Lianyi, Sun, Tao

“…The high‐speed synchrotron X‐ray imaging technique was synchronized with a custom‐built laser‐melting setup to capture the dynamics of laser powder‐bed fusion…”
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Design of Radiation Tolerant Materials Via Interface Engineering by Han, Weizhong, Demkowicz, Michael J., Mara, Nathan A., Fu, Engang, Sinha, Subhasis, Rollett, Anthony D., Wang, Yongqiang, Carpenter, John S., Beyerlein, Irene J., Misra, Amit

“…A novel interface engineering strategy is proposed to simultaneously achieve superior irradiation tolerance, high strength, and high thermal stability in bulk…”
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Orientation gradients in relation to grain boundaries at varying strain level and spatial resolution by Subedi, Samikshya, Pokharel, Reeju, Rollett, Anthony D.

“…The resolution dependence of orientation gradients was studied in a well-annealed 99.9995% pure polycrystalline copper pulled to failure in tension. Owing to…”
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An Updated Index Including Toughness for Hot-Cracking Susceptibility by Tang, Guannan, Gould, Benjamin J., Ngowe, Abigail, Rollett, Anthony D.

“…Hot cracking is one of the major defects that can occur in laser-based additive manufacturing. During the terminal stage of solidification, hot cracking…”
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Statistical variations in predicted martensite variant volume fractions in superelastically deformed NiTi modeled using habit plane variants versus correspondence variants by Sridhar, Shivram Kashyap, Stebner, Aaron P., Rollett, Anthony D.

“…Habit plane variants (HPVs) are traditionally used as the fundamental microstructure unit in micromechanical models of shape memory alloys. Recently, an…”
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Microstructure Generation via Generative Adversarial Network for Heterogeneous, Topologically Complex 3D Materials by Hsu, Tim, Epting, William K., Kim, Hokon, Abernathy, Harry W., Hackett, Gregory A., Rollett, Anthony D., Salvador, Paul A., Holm, Elizabeth A.

“…Using a large-scale, experimentally captured 3D microstructure data set, we implement the generative adversarial network (GAN) framework to learn and generate…”
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