Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Marek Dollar"'
Publikováno v:
Materials Characterization. 61:769-777
This paper characterizes the microstructure and mechanical properties of a nickel-based superalloy with a nominal composition of Ni–25Mo–8Cr (wt.%) after long-term exposures to elevated temperatures. The alloy is strengthened by long-range-ordere
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::071b9c0fc5871118cece3b3d5c39eba5
https://doi.org/10.1016/j.matchar.2010.04.008
https://doi.org/10.1016/j.matchar.2010.04.008
Autor:
A. Dollár, Marek Dollar
Publikováno v:
Journal of Materials Processing Technology. :491-495
In the early 1990s, there was a widespread belief that metals, ceramics and intermetallics with the grain size in the nanometer range would exhibit the unique combination of ultra-high strength and high ductility at ambient temperatures. However, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fec360bfa5246c47f99dfe1ffde6c5bb
https://doi.org/10.1016/j.jmatprotec.2004.07.108
https://doi.org/10.1016/j.jmatprotec.2004.07.108
Publikováno v:
Revue de Métallurgie. 100:807-814
Mechanisms of deformation in an age-hardenable Ni-Mo-Cr alloy containing large precipitates of the coherent ordered phase were investigated. The dominant deformation mechanism in the examined alloy depended on the applied amount of strain: for low st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::923b0fe56059dcd072f00314706f8dba
https://doi.org/10.1051/metal:2003206
https://doi.org/10.1051/metal:2003206
Publikováno v:
Materials Science and Engineering: A. :284-289
The influence of modifications of heat treatment applied to a commercial Ni–25 wt.%Mo–8 wt.%Cr age-hardenable alloy (HAYNES® 242™) on microstructure and mechanical properties were investigated. The standard heat treatment (aging at 650°C for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cf6d0ac722615623f225d9c3d53d580
https://doi.org/10.1016/s0921-5093(01)01104-2
https://doi.org/10.1016/s0921-5093(01)01104-2
Publikováno v:
Scripta Materialia. 43:343-348
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2427600571b96a943b405576809488dd
https://doi.org/10.1016/s1359-6462(00)00420-6
https://doi.org/10.1016/s1359-6462(00)00420-6
Publikováno v:
Scopus-Elsevier
Nanocrystalline ordered NiAl (n-NiAl) was successfully synthesized by an electron beam gas condensation and compacted in-situ at various temperatures. As-compacted material exhibits grain sizes between 2 and 4 nm and densities between 78 and 94% of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea88ded699c876c1612d263c32000d39
https://doi.org/10.1016/s0921-5093(98)00810-7
https://doi.org/10.1016/s0921-5093(98)00810-7
Publikováno v:
Journal of Microscopy. 224:12-14
Summary The influence of grain refinement on the mechanical properties of differently processed NiAl was presented. Five NiAl near-stoichiometric alloys were investigated, three conventionally cast and two sintered from powders (fine-grained powder m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57334297a4f1198f4e536899130a0fa4
https://doi.org/10.1111/j.1365-2818.2006.01639.x
https://doi.org/10.1111/j.1365-2818.2006.01639.x
Publikováno v:
Materials Science and Engineering: A. :507-514
Two Nb–Al alloys containing 18 and 20 at.%Al were successfully processed by mechanical alloying followed by hot pressing. Analysis of X-ray spectra as well as transmission electron microscopy studies revealed the presence of four phases: niobium so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e7451fed1e12021cf4a5f9e1a3f19c3
https://doi.org/10.1016/s0921-5093(97)00624-2
https://doi.org/10.1016/s0921-5093(97)00624-2
Publikováno v:
Materials Science and Engineering: A. :464-471
The mechanical properties of NiAl-based composites containing a dispersion of AlN particles and Al2O3 fibers were studied. NiAl matrix powder containing a dispersion of about 5 vol.% AlN was synthesized by mechanical alloying (MA) of elemental nickel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d1dac867f976a4212ac71836e230d99
https://doi.org/10.1016/s0921-5093(97)00618-7
https://doi.org/10.1016/s0921-5093(97)00618-7
Publikováno v:
Scripta Materialia. 37:843-849
The main conclusions drawn from this study are: (1) The substantial room temperature ductility observed in nanocrystalline NiAl samples suggests that diffusional mechanisms such as grain boundary sliding controlled by grain boundary diffusion are con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45937625648f8a20c860ca9b18c96387
https://doi.org/10.1016/s1359-6462(97)00159-0
https://doi.org/10.1016/s1359-6462(97)00159-0