Zobrazeno 1 - 10
of 33
pro vyhledávání: '"R.W. Margevicius"'
Publikováno v:
Materials Science and Engineering: A. 270:197-209
The fracture toughness of swaged polycrystalline tungsten was tested parallel and perpendicular to the swaging direction and under mixed mode I/mode II loading. The fracture mode is dominated by the microstructure and changed from all-transgranular c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4447867129bf11475342d1613aa6f104
https://doi.org/10.1016/s0921-5093(99)00252-x
https://doi.org/10.1016/s0921-5093(99)00252-x
Autor:
R.W. Margevicius, John J. Lewandowski
Publikováno v:
Scripta Metallurgica et Materialia. 29:1651-1654
NiAl is currently a candidate for high temperature structural applications because of its high melting temperature, low density, and excellent oxidation resistance. Polycrystalline NiAl possesses low ductility at ambient temperatures, but it has a br
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af76a0930abee0981195e5bb23744fac
https://doi.org/10.1016/0956-716x(93)90293-2
https://doi.org/10.1016/0956-716x(93)90293-2
Publikováno v:
Scripta Metallurgica et Materialia. 29:1309-1312
The authors have reported dislocation densities of cast/extruded and as-annealed NiAl to be typically 10{sup 8} cm-{sup 2}; pressurization to 1,400MPa increased the dislocation density to 10{sup 9} cm-{sup 2} in isolated regions. The representative d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c58d5cc1a4d7a6739b196ff6d643519
https://doi.org/10.1016/0956-716x(93)90129-g
https://doi.org/10.1016/0956-716x(93)90129-g
Publikováno v:
Scripta Metallurgica et Materialia. 28:575-580
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb3913980e323daa8e6395b846c0cc2d
https://doi.org/10.1016/0956-716x(93)90199-3
https://doi.org/10.1016/0956-716x(93)90199-3
Autor:
John J. Lewandowski, R.W. Margevicius
Publikováno v:
Acta Metallurgica et Materialia. 41:485-496
The effects of pressurization on the generation of dislocations and their effects on the subsequent flow behavior of cast, extruded and annealed NiAl are described. It is shown that simple pressurization to either 500 or 1400 MPa produces dislocation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9314e8622bd2c3014f1ea26d4edf046
https://doi.org/10.1016/0956-7151(93)90077-6
https://doi.org/10.1016/0956-7151(93)90077-6
Publikováno v:
Scripta Metallurgica et Materialia. 26:1733-1736
The decrease in yield strength in NiAl due to hydrostatic pressure is examined via a comparison of the tensile flow behavior in the low strain regime at 0.1 MPa for NiAl which was cast, extruded, and annealed for 2 hr at 827 C in argon and very slowl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7014b7e49847df00b871e03e0a1b2df
https://doi.org/10.1016/0956-716x(92)90543-n
https://doi.org/10.1016/0956-716x(92)90543-n
Autor:
John J. Lewandowski, R.W. Margevicius
Publikováno v:
Scripta Metallurgica et Materialia. 25:2017-2022
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afc6e60c81acac182964bcedf7c23adb
https://doi.org/10.1016/0956-716x(91)90267-5
https://doi.org/10.1016/0956-716x(91)90267-5
Research has been underway at Los Alamos National Laboratory for several years to develop an alloy capable of containing toxic materials in the event of a fire involving a nuclear weapon. Due to their high melting point, good oxidation resistance, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f091036cd9b90e5b5831dc22a2e1c5b6
https://doi.org/10.2172/219383
https://doi.org/10.2172/219383
Publikováno v:
MRS Proceedings. 288
The effects of testing NiAl in tension under a superimposed pressure are described. The flow stress decreases when subjected to pressure due to the generation of mobile dislocations. These dislocations can become pinned when subjected to aging at mod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::377ef21938e77c595be2c5bcf9d5a754
https://doi.org/10.1557/proc-288-555
https://doi.org/10.1557/proc-288-555