Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Joachim H. Schneibel"'
Publikováno v:
Intermetallics. 54:95-103
The room temperature strength of FeAl alloys can be increased significantly by freezing in the high thermal vacancy concentrations present at elevated temperatures. In contrast, because of their lower thermal vacancy concentrations, vacancy strengthe
Autor:
Martin Heilmaier, Joachim H. Schneibel
Publikováno v:
MATERIALS TRANSACTIONS. 55:44-51
The HallPetch effect responsible for the strength of fine-grained and ultrafine-grained (UFG) metals is almost exclusively measured at room temperature. One reason for this is that at elevated temperatures grains tend to coarsen, and this negates t
Publikováno v:
Intermetallics. 21:56-61
The room-temperature yield strength of quenched FeAl-based iron aluminides depends strongly on the temperature from which the quench occurs. There is evidence that Fe{sub 3}Al-based iron aluminides show similar behavior, albeit not as pronounced. The
Publikováno v:
Acta Materialia. 59:1300-1308
The yield stress of oxide dispersion-strengthened (ODS) PM2000 steel and nanocluster-strengthened (NCS) 14YWT steel was measured as a function of temperature for grain sizes from 0.2 μm to ∞. In combination with data from the literature, it was fo
Publikováno v:
Acta Materialia. 59:1346-1353
Grain boundary diffusion of Fe in nanocluster-strengthened ferritic steel (Fe–14Cr–3W–0.4Ti–0.25Y 2 O 3 in wt.%) has been investigated. The steel was produced by mechanical alloying followed by hot extrusion. The final grain size was ∼200 n
Autor:
Holger Saage, Mykhailo Goncharenko, P. I. Loboda, Martin Heilmaier, Joachim H. Schneibel, Heike Rühe
Publikováno v:
Intermetallics. 18:1369-1374
The low cycle fatigue (LCF) behavior of two hot extruded alloys with the compositions Fe–27.1Al and Fe–26.4Al–4Cr (at%) containing microalloying additions of Nb, Zr, C, and B was investigated at room temperature and 300 °C in air. The LCF test
Autor:
Daniel Sturm, Martin Heilmaier, P.M. Sarosi, Michael J. Mills, Joachim H. Schneibel, Michael K Miller, C.T. Liu
Publikováno v:
Scripta Materialia. 61:793-796
The microstructure and mechanical properties of ultrafine-grained ferritic alloys containing nanoclusters (NCs) are investigated. The NCs (diameter ∼3 nm) as well as the grain size (∼200 nm) remain stable at 1000 oC. Substantial Hall–Petch stre
Autor:
Easo P. George, Manja Krüger, Daniel Sturm, Joachim H. Schneibel, Ch. Somsen, Y. Yang, Lee Heatherly Jr, Gunther Eggeler, Holger Saage, Martin Heilmaier
Publikováno v:
Acta Materialia. 57:3895-3901
Mo–1.5 at.% Si alloys with additions of either Y2O3 or Zr were manufactured by mechanical alloying. The Y2O3 particles reduced the grain size and increased the room temperature strength, but did not alleviate the brittleness of previously investiga
Publikováno v:
Scripta Materialia. 59:131-134
Molybdenum–rhenium alloys have a lower ductile-to-brittle transition temperature than molybdenum, which is advantageous in applications requiring improved room temperature ductility or impact toughness. However, at high temperatures rhenium strengt