ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Nb and/or Cr added Ni3(Si,Ti) as well as unalloyed Ni3(Si,Ti) intermetallic thin foils (i.e.,Ni3(Si,Ti), Ni3(Si,Ti)+Nb, Ni3(Si,Ti)+Cr and Ni3(Si,Ti)+Nb,Cr) were fabricated from arc-meltedpolycrystalline ingots by thermomechanical process and subsequent heavy cold-rolling. Tensileproperty at room temperature as well as at high temperature and oxidization behavior of thecold-rolled foils with a thickness of ~200μm were investigated. The Ni3(Si,Ti) and Ni3(Si,Ti)+Nballoys showed a single-phase microstructure consisting of L12 phase, while the Ni3(Si,Ti)+Cr andNi3(Si,Ti)+Nb,Cr alloys exhibited a two-phase microstructure with A1 (fcc) Ni solid solution phasewithin the L12 grains. All the cold-rolled foils showed high tensile strength (over 2GPa) at roomtemperature although no plastic elongation was observed. The addition of Nb and/or Cr slightlyenhanced the room-temperature tensile strength of the Ni3(Si,Ti) alloy. On the other hand, theaddition of Nb and/or Cr prominently enhanced high-temperature tensile strength as well asoxidization resistance, while the addition of Cr improved high-temperature elongation
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.411.pdf
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