Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Jonathan P. Ligda"'
Publikováno v:
Journal of the European Ceramic Society. 41:2034-2048
This paper explores the compressive responses of alumina ceramics subjected to various levels of pre-damage via internal cracking. Pre-damage is achieved by subjecting the samples to thermal shock. Mechanical loading is performed using a load frame f
Autor:
Brian E. Schuster, G. H. Campbell, Nicholas Lorenzo, Jonathan P. Ligda, Thomas Voisin, Melissa K. Santala, Yong Zhang, Tian T. Li, Timothy P. Weihs, Michael D. Grapes
Publikováno v:
Materials Today. 33:10-16
The plastic deformation of polycrystalline metals at high strain rates is controlled by the way defects (dislocations and twins) nucleate, propagate, and interact in the microstructure. To-date, the role of these defects has been estimated based on d
Publikováno v:
Journal of Dynamic Behavior of Materials. 6:24-33
Several miniature Kolsky bars are used to obtain stress–strain curves for nanocrystalline Cu–10Ta over a range of high strain-rates. The smallest bar (steel) has a 305 μm diameter, and achieved rates up to 700 × 103/s. Different sample sizes ar
Publikováno v:
Acta Materialia. 162:202-213
Tungsten is notoriously brittle metal at room temperature. Furthermore, contrary to most metals, plastic deformation increases ductility and recrystallization decreases ductility of tungsten. The fundamentals that govern this behavior have challenged
Autor:
Scott Middlemas, Brady G. Butler, Zhigang Zak Fang, Chai Ren, James D. Paramore, Jonathan P. Ligda, Kevin J. Hemker
Publikováno v:
International Journal of Refractory Metals and Hard Materials. 75:248-261
The physical, chemical, and mechanical properties of tungsten are at the far limits of all engineering materials. These unique properties, particularly ultra-high strength, density, and melting point, create enticing prospects for using tungsten in e
Publikováno v:
Mechanics of Materials. 161:104005
Despite promise as a lightweight structural and armor material, widespread adoption of Mg alloys remains limited. For instance, the highly anisotropic properties, arising both from the fundamental deformation mechanisms and strong texture developed d
Publikováno v:
Engineering Fracture Mechanics. 244:107539
This paper details the dynamic materials testing of three advanced ceramics (CoorsTek Engineered Ceramics AD85 and AD995 alumina and a silicon carbide) and a cermet (Luminant TitanMade®) and discusses the observations of damage accumulation in these
Publikováno v:
Dynamic Behavior of Materials, Volume 1 ISBN: 9783319950884
A newly developed micro-kolsy bar system at the Army Research Laboratory has made it possible to test materials in compression at strain rates greater than 104 s−1. Opening up a new realm for testing of materials at high strain rates. In order to r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::026ecb9a88b6435303babb2db9a067c3
https://doi.org/10.1007/978-3-319-95089-1_20
https://doi.org/10.1007/978-3-319-95089-1_20
Publikováno v:
Dynamic Behavior of Materials, Volume 1 ISBN: 9783319950884
The compressive stress-strain response of a commercially pure (99.98%) Ta was investigated at strain-rates ranging from 0.001/s to 500 k/s. Strain-rates up to 20 k/s were obtained using conventional load frames and Kolsky bar methods. The higher stra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63292f6100de6010635df103db7d5986
https://doi.org/10.1007/978-3-319-95089-1_35
https://doi.org/10.1007/978-3-319-95089-1_35
Publikováno v:
Mechanics of Additive and Advanced Manufacturing, Volume 8 ISBN: 9783319950822
Hydrogen sintering and phase transformation is a Ti-6Al-4V heat treatment process capable of normalizing the microstructure of bulk parts. The mechanical properties of these processed parts are comparable to that of wrought Ti-6Al-4V, which makes it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a5a63299aee956eaa9f9f399f1edbf6
https://doi.org/10.1007/978-3-319-95083-9_6
https://doi.org/10.1007/978-3-319-95083-9_6