Author
Roger N. Wright
Bio: Roger N. Wright is an academic researcher from Rensselaer Polytechnic Institute. The author has contributed to research in topics: Wire drawing & Deformation (engineering). The author has an hindex of 11, co-authored 49 publications receiving 325 citations.
Papers
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Book•
17 Nov 2010
TL;DR: Wire Technology: Process Engineering and Metallurgy, Second Edition as discussed by the authors covers new developments in high-speed equipment and the drawing of ultra-high strength steels, along with new computer-based design and analysis software and techniques, including Finite Element Analysis.
Abstract: Wire Technology: Process Engineering and Metallurgy, Second Edition, covers new developments in high-speed equipment and the drawing of ultra-high strength steels, along with new computer-based design and analysis software and techniques, including Finite Element Analysis. In addition, the author shares his design and risk prediction calculations, as well as several new case studies. New and extended sections cover measurement and instrumentation, die temperature and cooling, multiwire drawing, and high strength steel wire. Coverage of process economics has been greatly enhanced, including an exploration of product yields and cost analysis, as has the coverage of sustainability aspects such as energy use and recycling. As with the first edition, questions and problems are included at the end of each chapter to reinforce key concepts.Written by an internationally-recognized specialist in wire drawing with extensive academic and industry experienceProvides real-world examples, problems, and case studies that allow engineers to easily apply the theory to their workplace, thus improving productivity and process efficiencyCovers both ferrous and non-ferrous metals in one volume
64 citations
TL;DR: In this article, the coarsening behavior of Mg2Si intermetallic particles was studied during homogenization of aluminum 6105 alloy, and it was found that the large Mg 2Si precipitates coarsened with time.
Abstract: The coarsening behavior of Mg2Si intermetallic particles was studied during homogenization of aluminum 6105 alloy. An industrially homogenized 6105 aluminum alloy contained large globular undissolved Mg2Si. With subsequent heat treatment at 590 °C over 1 week, it was found that the large Mg2Si precipitates coarsened with time. The coarsening of the large Mg2Si precipitates was quantified by statistical analysis of micrographs. A linear relationship between \(\bar R^{3.8} - \bar R_i^{3.8} \) and time fits the experimental measurements quite well, indicating that the coarsening is diffusion controlled, with grain-boundary diffusion dominating volume diffusion.
45 citations
TL;DR: In this paper, a 2.47 mm ETP wire was drawn in five passes to 1.45 mm using carbide dies with nominal included angles of 8, 16 and 24 degrees.
18 citations
Journal Article•
17 citations
TL;DR: A study of the role of C and N in the brittle fracture of Fe-26 wt pct Cr has been under-taken on alloys containing combined c and N levels of 67 and 570 ppm as mentioned in this paper.
Abstract: A study of the role of C and N in the brittle fracture of Fe-26 wt pct Cr has been under-taken on alloys containing combined C and N levels of 67 and 570 ppm Mechanical and microstructural characterization has been performed on structures involving C and N in the states of solute, grain boundary precipitate, and intragranular precipitate (with emphasis on plate-like intragranular nitrides) Fracture mechanisms have been elucidated through microscopic evaluation of electropolished strips pulled in the ductile to brittle transition temperature (DBTT) range DBTT variations larger than 200°C were observed The alloys are embrittled by grain boundary carbonitrides and intragranular nitrides Quenching to suppress precipitation was beneficial to the low C and N alloy but led to severe embrittlement at the higher C and N level Roles of carbides, nitrides, and twins in microcrack formation were revealed A relationship between precipitation annealing temperature, embrittlement mode, and DBTT was established
17 citations
Cited by
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TL;DR: In this paper, the evolution of the structure of nanophase materials prepared by mechanical attrition is reviewed and the prominent observation for the mechanical attrition of binary immiscible systems is the very large metastable solid solubilities that are attained, presumably related to solute segregation at the nanocrystalline grain boundaries.
581 citations
TL;DR: In view of the interest attaching to the vaporisation and diffusion of solids, the following observations may be worthy of record as discussed by the authors, which may be seen as a good starting point for further research.
Abstract: IN view of the interest attaching to the vaporisation and diffusion of solids, the following observations may be worthy of record.
560 citations
Patent•
19 Jun 2015
TL;DR: In this article, the authors present 3D objects, 3D printing processes, as well as methods, apparatuses, and systems for the production of a 3D object.
Abstract: The present disclosure provides three-dimensional (3D) objects, 3D printing processes, as well as methods, apparatuses and systems for the production of a 3D object. Methods, apparatuses and systems of the present disclosure may reduce or eliminate the need for auxiliary supports. The present disclosure provides three dimensional (3D) objects printed utilizing the printing processes, methods, apparatuses and systems described herein.
272 citations
TL;DR: In this paper, the effects of Co content and WC grain size on wear were examined for 13 different carbide types and showed that wear increased with both co content and grain size of the carbide.
174 citations
TL;DR: In this paper, the structure and mechanical characterization of a friction stir welded 409M ferritic stainless steel joint were carried out using optical microscopy, microhardness testing, transverse tensile, impact and bend tests were performed.
130 citations