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:
Ferritic heat-resistant steel comprises basic alloys of Fe-10mass%Cr-W. This studyinvestigates how stress, the addition of Co, and tempering before aging affect the precipitation ofthe Laves phase of Fe-10Cr-6W ferritic heat-resistant steel, which is used in ultra-supercriticalpower plants and nuclear reactor materials. The study also investigates the mechanical properties ofthe steel. Precipitation of the Laves phase by aging increases the tensile strength, but decreases theelongation and impact strength of the alloys. Toughness of the alloys decreases greatly as very finedisk-like Laves phases appear in early aging stage. The strength and impact value of the steeldecrease when the steel is tempered before aging. This is mainly due to decrease of density andincrease of the particle size in the Laves phase. Since precipitation of the Laves phase increases byaddition of Co; the strength increases and the elongation and impact value decrease
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1745.pdf
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