Zobrazeno 1 - 10
of 476
pro vyhledávání: '"A. D. Rollett"'
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-12 (2022)
Complexities of laser-material interactions pose a challenge to minimize defects in additively manufactured metal parts. Here the authors visualize all phases of matter simultaneously to expand understanding of the interactions and show atmospheric i
Externí odkaz:
https://doaj.org/article/6d4abae6459e4d26bd25b36524b68af5
Autor:
Yaozhong Zhang, Mohammadreza Yaghoobi, Yueheng Zhang, Daniel Rubio-Ejchel, Peter Kenesei, Jun-Sang Park, Anthony D. Rollett, Jerard V. Gordon
Publikováno v:
Journal of Materials Research and Technology, Vol 30, Iss , Pp 8792-8804 (2024)
The three-dimensional grain-averaged response of solid bar samples under non-proportional (NP) elastoplastic axial-torsional loading was investigated using in situ high energy diffraction microscopy (HEDM) and companion crystal plasticity finite elem
Externí odkaz:
https://doaj.org/article/6ccf9b12807747c1bdb8e794b8b2c395
Autor:
Laszlo S. Toth, Anthony D. Rollett
Publikováno v:
Journal of Materials Research and Technology, Vol 30, Iss , Pp 4795-4799 (2024)
A new model is presented for the interpretation of the nearly linear Stage IV large strain hardening behavior observed in polycrystalline metals. The approach is based on the orientation change of the grains that induces a curvature of the crystallog
Externí odkaz:
https://doaj.org/article/c70a626a60404019945c04d5ead7189f
Autor:
Seunghee A. Oh, Joseph W. Aroh, Nicholas L. Lamprinakos, Chihpin Andrew Chuang, Ashley N. Bucsek, Anthony D. Rollett
Publikováno v:
Communications Materials, Vol 5, Iss 1, Pp 1-10 (2024)
Abstract Martensite, α‘, commonly appears in Ti-6Al-4V upon rapid cooling from above the β-transus temperature. It is known that α‘ decomposes into α and β at high temperatures but well below the β-transus temperature. Here, we study the de
Externí odkaz:
https://doaj.org/article/7ab02593151043bdb0eb5c4d2b0ebb5a
Publikováno v:
npj Computational Materials, Vol 10, Iss 1, Pp 1-13 (2024)
Abstract The quantification of absorbed light is essential for understanding laser-material interactions and melt pool dynamics in order to minimize defects in additively manufactured metal components. The geometry of a vapor depression formed during
Externí odkaz:
https://doaj.org/article/f9f17b865eb84715963c1a243d431c8d
Publikováno v:
Additive Manufacturing Letters, Vol 9, Iss , Pp 100197- (2024)
In this study, we investigated the microstructural variation of Ti-6Al-4 V in inverted pyramid parts built using Laser Powder Bed Fusion (LPBF). Two parts were fabricated with and without ghost parts to study the effects of interlayer delay time on t
Externí odkaz:
https://doaj.org/article/1f4edfbebc2f4f52887c739b8a731051
Autor:
Rajib Halder, Petrus C. Pistorius, Scott Blazanin, Rigved P. Sardey, Maria J. Quintana, Edward A. Pierson, Amit K. Verma, Peter C. Collins, Anthony D. Rollett
Publikováno v:
Materials, Vol 17, Iss 13, p 3307 (2024)
Laser hot wire directed energy deposition (LHW-DED) is a layer-by-layer additive manufacturing technique that permits the fabrication of large-scale Ti-6Al-4V (Ti64) components with a high deposition rate and has gained traction in the aerospace sect
Externí odkaz:
https://doaj.org/article/9ae2fc4bf69949adb4b045c3c413a5c5
Autor:
Yueheng Zhang, J. Nicholas Porter, Matthew J. Wilkin, Ross Harder, Wonsuk Cha, Robert M. Suter, He Liu, Landon Schnebly, Richard L. Sandberg, Joshua A. Miller, Jon Tischler, Anastasios Pateras, Anthony D. Rollett
Publikováno v:
Journal of Synchrotron Radiation, Vol 30, Iss 4, Pp 796-806 (2023)
The recent commissioning of a movable monochromator at the 34-ID-C endstation of the Advanced Photon Source has vastly simplified the collection of Bragg coherent diffraction imaging (BCDI) data from multiple Bragg peaks of sub-micrometre scale sampl
Externí odkaz:
https://doaj.org/article/0a90a725dab64b279ccdbce72ece60a8
Autor:
Ziheng Wu, Guannan Tang, Samuel J. Clark, Andrey Meshkov, Subhrajit Roychowdhury, Benjamin Gould, Victor Ostroverkhov, Thomas Adcock, Steven J. Duclos, Kamel Fezzaa, Christopher Immer, Anthony D. Rollett
Publikováno v:
Communications Materials, Vol 4, Iss 1, Pp 1-10 (2023)
Beam oscillation is an attractive method to achieve melt pool and microstructure control in laser powder bed additive manufacturing. Here, in-situ X-ray imaging and high-fidelity modeling reveal the unique keyhole dynamics in a kHz laser oscillation
Externí odkaz:
https://doaj.org/article/afd0eb189abc45cfae07d43f61a39808
Publikováno v:
Data in Brief, Vol 48, Iss , Pp 109050- (2023)
Hot cracking as the major concern in the manufacturing process of metal alloys is detrimental to part performance and can lead to catastrophic failure. However, current research in this field is restricted to the scarcity of the relevant hot cracking
Externí odkaz:
https://doaj.org/article/fdfa0eb049664d088ed101daed96e7d0