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 aim of the present work is to determine the austenite to ferrite transformationtemperatures in a Si-Al non-oriented electrical steel. Critical transformation temperatures onheating and cooling are determined using an in-situ X-ray diffraction technique where the specimenis heated or cooled in a stepwise manner. The transformation temperatures are estimated fromchanges in the intensities of the (110)α and (111)γ peaks as a function of temperature. The timeevolution of the microstructure resulting from isothermal heat treatments at temperatures between800 and 1000 °C applied after cooling from 1050 °C is followed by quantitative metallography onsamples quenched into water. The results show that, on cooling, formation of ferrite starts at about950 °C and ends at 790 °C, indicating a strong effect of Si and Al on the austenite to ferrite andeutectoid transformations. These results suggest that the low tensile ductility exhibited by thismaterial at temperatures near 1000 °C can be attributed to strain localization in strain-inducedferrite formed at temperatures as high as 1025 °C
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.560.85.pdf
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