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NIST Authors in Bold

Displaying 26 - 50 of 1998

Assessment of intra-build variations in tensile strength in electron beam powder-bed fusion Ti-6Al-4V part 1: Effects of build height

June 2, 2022
Nicholas Derimow, Alejandro Romero, Aldo Rubio, Cesar Terrazas, Newell Moser, Orion Kafka, Jake Benzing, Francisco Medina, Ryan Wicker, Nik Hrabe
In this work, rectangular blocks of electron beam powder-bed fusion (PBF-EB) additively manufactured (AM) Ti-6Al-4V were built, such that a total of 68 mini-tensile test coupons could be extracted for mechanical testing over a range of build height and

Agile Robotic Planning with Gwendolen

May 31, 2022
John L. Michaloski, Craig I. Schlenoff, Rafael Cardoso, Michael Fisher
The future of robotics foresees autonomous behavior that can complete tasks intelligently, with a focus on adaptability, flexibility, and versatility. In such systems, it is critical for robots to quickly and safely perform an operation. However, such

Assessment of intra-build variations in tensile strength in electron beam powder-bed fusion Ti-6Al-4V part 2: Effects of powder mixing

May 31, 2022
Nicholas Derimow, Jake Benzing, Orion Kafka, Newell Moser, Priya Pathare, Michael Walker, Frank DelRio, Nik Hrabe
In Part 2 of this paper series, high-throughput tensile testing and characterization of porosity, microstructure, and oxygen content was carried out on Ti-6Al-4V samples that were fabricated via electron beam powder-bed fusion (PBF-EB) to test our

Real-time estimation of cutting forces via physics-inspired data-driven model

May 25, 2022
Gregory W. Vogl, Dominique Regli, Gregory Corson
A method is presented to estimate the cutting forces in real time within machine tools for any spindle speed, force profile, tool type, and cutting conditions. Before cutting, a metrology suite and instrumented tool holder are used to induce magnetic

Advancing Autonomous Robot Development and Adoption Through Standards

May 4, 2022
Craig I. Schlenoff
Autonomy is the ability to perform tasks without help. In the case of autonomous robots, obstacles may arise internally like an electrical short or a broken part or externally such as encountering debris. These instances can cause mission interruption or

Models for an Ultraviolet-C Research and Development Consortium

March 25, 2022
Dianne L. Poster, C Cameron Miller, Yaw S. Obeng, John J. Kasianowicz, Michael T. Postek, Norman Horn, Troy Cowan, Richard Martinello
The development of an international, precompetitive, collaborative, ultraviolet (UV) research consortium is discussed as an opportunity to lay the groundwork for a new UV commercial industry and the supply chain to support this industry. History has

Protecting Information and System Integrity in Industrial Control System Environments: Cybersecurity for the Manufacturing Sector

March 16, 2022
Michael Powell, Michael Pease, Keith A. Stouffer, CheeYee Tang, Timothy Zimmerman, Chelsea Dean, Kangmin Zheng, John Hoyt, Mary Raguso, Joseph Brule, Aslam Sherule, Matthew Zopf
Today's manufacturing organizations rely on industrial control systems (ICS) to conduct their operations. Increasingly, ICS are facing more frequent, sophisticated cyber attacks—making manufacturing the second-most-targeted industry. Cyber attacks against

Design and Testing of Wireless Motion Gauges for Two Collaborative Robot Arms

March 11, 2022
Yong Sik Kim, Nicholas G. Dagalakis, Jeremy Marvel, Geraldine Cheok
Most existing robot performance evaluation methods focus on single robotic arms performing independent motion tasks. In this paper, a motion gauge is proposed to evaluate the symmetrical coordinated-motion performance between two robotic arms. For this

Refocusing the Barriers to Sustainability for Small and Medium Manufacturers

February 14, 2022
Xavier R. Escoto, Demsas Gebrehewot, KC Morris
Sustainable manufacturing practices are a necessary component of sustainable development. Current practices in a linear economy—produce, consume, discard—will not be sufficient to sustain humanity over the long term. At the same time manufacturing is

Visualizing Standardized Model-based Design and Inspection Data in Augmented Reality

February 7, 2022
Teodor Vernica, Robert R. Lipman, Thomas Kramer, Soonjo Kwon, William Z. Bernstein
Augmented reality (AR) technologies present immense potential for the design and manufacturing communities. However, coordinating traditional engineering data representations into AR systems without loss of context and information remains a challenge. A

Agile Industrial Robots

January 24, 2022
Craig I. Schlenoff, William P. Shackleford, Zeid Kootbally, Brian Antonishek, Frederick M. Proctor, Thomas Kramer, William Harrison, Anthony Downs
In this chapter, we explore existing robot agility research efforts, while focusing on key technologies that help to enable agility, such as the ones mentioned in the preceding paragraphs. In particular, we will look at perception, knowledge representation

A Fundamental Equation of State for Vinyl Chloride

January 10, 2022
Monika Thol, Florian Fenkl, Eric W. Lemmon
A fundamental equation of state in terms of the Helmholtz energy is presented for vinyl chloride. Due to its fundamental nature, it can be used to consistently calculate all thermodynamic state properties in the fluid region. Based on the underlying

In situ absorption synchrotron measurements, predictive modeling, microstructural analysis, and scanning probe measurements of laser melted Ti-6Al-4V single tracks for additive manufacturing applications

December 29, 2021
Nicholas Derimow, Edwin Schwalbach, Jake Benzing, Jason Killgore, Aly Artusio-Glimpse, Nik Hrabe, Brian Simonds
In this work, the fundamental processing-structure-property (PSP) relationships that govern laser-based additive manufacturing were investigated with the Ti-6Al-4V alloy. X-ray synchrotron imaging carried out in conjunction with in-situ integrating sphere


December 15, 2021
Deogratias Kibira, Guodong Shao, Brian A. Weiss
The application of robot workcells increases the efficiency and cost effectiveness of manufacturing systems. However, during operation, robots naturally degrade leading to performance deterioration. Monitoring, diagnostics, and prognostics (collectively
Displaying 26 - 50 of 1998