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:
The carbon and nitrogen free new alloys which were composed of the supersaturatedmartensitic microstructure with high dislocation density before the creep test have been investigatedsystematically. These alloys were produced from the new approach which raised creep strengthby the utilization of the reverse transformed austenite phase as a matrix and intermetalliccompounds such as Laves and μ-phases as precipitates during creep test. It is important thatthese alloys are independent of any carbides and carbo-nitrides as strengthening factors. Creepbehavior of the alloys is found to be different from that of the conventional high-Cr ferritic heatresistant steels. The minimum creep rates of the Fe-Ni alloys at 700°C are found to be muchlower than that of the conventional steel, which is due to fine dispersion strengthening useful evenat 700°C in these alloys. As a result carbon and nitrogen free alloys exhibited superior creepproperties at temperatures more over 700°C, and steam oxidation resistance
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3076.pdf
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