Zobrazeno 1 - 10
of 26
pro vyhledávání: '"N. I. Tymiak"'
Publikováno v:
Journal of Materials Research. 27:552-561
To understand the brittleness transition in low-toughness materials, the nucleation and kinetics of dislocations must be measured and modeled. One aspect overlooked is that the apparent activation energy for plasticity is modified at very high stress
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c57f1ac365c91b184b89686f605db04
https://doi.org/10.1557/jmr.2011.348
https://doi.org/10.1557/jmr.2011.348
Autor:
N. I. Tymiak, William W Gerberich
Publikováno v:
Philosophical Magazine. 87:5143-5168
The present study focuses on the effects of surface orientation on the peculiarities of the earliest stages of nanoindentation-induced plasticity in sapphire (Al2O3) single crystal surfaces. The previous theoretical analyses do not account for all th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f667a7fbe134f2b12b4f5d1123fcbc3
https://doi.org/10.1080/14786430701618464
https://doi.org/10.1080/14786430701618464
Autor:
N. I. Tymiak, William W Gerberich
Publikováno v:
Philosophical Magazine. 87:5169-5188
Part II of the present study focuses on the yield point phenomenon, a discontinuous transition from the apparently elastic to the elastic–plastic regime for basal [C, (0001)], rhombohedral [R, (1 012)] and prism [A, (12 10) and M, (101 0)] planes o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f8ece50b1cad6f8129388991c3ace38
https://doi.org/10.1080/14786430701618472
https://doi.org/10.1080/14786430701618472
Publikováno v:
Acta Materialia. 52:553-563
Monitoring nanoindentation with an acoustic emission (AE) sensor integrated into an indenter tip provided a unique insight into the mechanisms of the initial stages of plasticity for four different sapphire single crystal surface orientations. These
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9402a1c0d3f02314be956e754331cc8
https://doi.org/10.1016/j.actamat.2003.09.039
https://doi.org/10.1016/j.actamat.2003.09.039
Publikováno v:
Journal of Materials Research. 18:784-796
This study evaluated a novel approach for acoustic emission (AE) monitoring of nanoindentation. The technique utilizes a miniature AE sensor integrated into a calibrated diamond indenter tip on a commercial nanoindentation system. The evaluation focu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e511f67c00ec235ae24ce77c2b6f28b
https://doi.org/10.1557/jmr.2003.0109
https://doi.org/10.1557/jmr.2003.0109
Publikováno v:
Philosophical Magazine A. 82:3349-3360
Fracture and contact mechanics can synergistically contribute to the fundamental understanding essential to scaling of small volumes. Consider two levels of scale in terms of contact area: (i) light wear of tribological contacts at the nanometre leve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7c36caa57e39e276c8a8173ca162679
https://doi.org/10.1080/01418610208240446
https://doi.org/10.1080/01418610208240446
Publikováno v:
Journal of Applied Mechanics. 69:433-442
For very shallow indentations in W, Al, Au, and Fe-3wt%Si single crystals, hardness decreased with increasing depth irrespective of increasing or decreasing strain gradients. As such, strain gradient theory appears insufficient to explain the indenta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4574ecb55a7315e2f7583ab68bebb04
https://doi.org/10.1115/1.1469004
https://doi.org/10.1115/1.1469004
Publikováno v:
Engineering Fracture Mechanics. 68:619-646
Continuous developments into the understanding of hydrogen/deformation interactions have been facilitated by experimental advances and improved computational capabilities. Interactive fracture problems have enjoyed the assistance of fracture mechanic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::615f4278112b23462825a0e084273e11
https://doi.org/10.1016/s0013-7944(00)00119-3
https://doi.org/10.1016/s0013-7944(00)00119-3
Publikováno v:
Scopus-Elsevier
Evaluation of the plasticity effects in fracture along ductile/brittle interfaces requires appropriate models for plastic dissipation in a ductile component. For thin ductile films, constitutive properties appropriate to the small volumes involved ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b6a3f2944cdfbb8ae690c21aa3d5835
https://doi.org/10.1007/s11661-000-0030-5
https://doi.org/10.1007/s11661-000-0030-5
Autor:
N. I. Tymiak, William W Gerberich, David F. Bahr, Alex A. Volinsky, M. D. Kriese, Denis Kramer
Publikováno v:
Acta Materialia. 47:4115-4123
Nanoindentation for measuring thin film mechanical properties is probably the most popular yet ill-understood method due to its inherent complexities. As opposed to burst pressure or microtensile tests of lithographed structures, where relatively uni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0611df8c9d4535a38b2c14d011becffa
https://doi.org/10.1016/s1359-6454(99)00270-0
https://doi.org/10.1016/s1359-6454(99)00270-0