Effect of Nb on dynamic strain induced austenite to ferrite transformation
Dynamic strain induced transformation (DSIT) is an interesting processing route to obtain ultrafine ferrite grains. In the present work, the effect of Nb on DSIT was investigated. Samples of low C-Mn steels, with and without Nb, were intensively deformed in hot torsion, aiming at the production of u...
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| Veröffentlicht in: | Materials science and technology 2007-04, Vol.23 (4), p.417-422 |
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| creator | Rios, P. R. de S. Bott, I. Santos, D. B. de Melo, T. M. F. Ferreira, J. L. |
| description | Dynamic strain induced transformation (DSIT) is an interesting processing route to obtain ultrafine ferrite grains. In the present work, the effect of Nb on DSIT was investigated. Samples of low C-Mn steels, with and without Nb, were intensively deformed in hot torsion, aiming at the production of ultrafine ferrite grains. After soaking at 1200°C, the samples were cooled to 1100°C, submitted to hot torsion deformation to decrease the grain size and then cooled to 900, 850 or 800°C for further hot torsion deformation. In the steel without Nb, recrystallisation took place before enough deformation could be accumulated to induce ferrite formation, so DSIT would only take place at the lowest temperature investigated, 800°C. In the Nb steel, Nb addition delayed austenite recrystallisation, allowing DSIT ferrite to form at higher temperature than in the steel without Nb, 850°C. |
| doi_str_mv | 10.1179/174328407X168900 |
| format | Article |
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R. ; de S. Bott, I. ; Santos, D. B. ; de Melo, T. M. F. ; Ferreira, J. L.</creator><creatorcontrib>Rios, P. R. ; de S. Bott, I. ; Santos, D. B. ; de Melo, T. M. F. ; Ferreira, J. L.</creatorcontrib><description>Dynamic strain induced transformation (DSIT) is an interesting processing route to obtain ultrafine ferrite grains. In the present work, the effect of Nb on DSIT was investigated. Samples of low C-Mn steels, with and without Nb, were intensively deformed in hot torsion, aiming at the production of ultrafine ferrite grains. After soaking at 1200°C, the samples were cooled to 1100°C, submitted to hot torsion deformation to decrease the grain size and then cooled to 900, 850 or 800°C for further hot torsion deformation. In the steel without Nb, recrystallisation took place before enough deformation could be accumulated to induce ferrite formation, so DSIT would only take place at the lowest temperature investigated, 800°C. 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In the steel without Nb, recrystallisation took place before enough deformation could be accumulated to induce ferrite formation, so DSIT would only take place at the lowest temperature investigated, 800°C. In the Nb steel, Nb addition delayed austenite recrystallisation, allowing DSIT ferrite to form at higher temperature than in the steel without Nb, 850°C.</description><subject>Alloys</subject><subject>AUSTENITE</subject><subject>FERRITE</subject><subject>Hot rolling</subject><subject>HOT TORSION</subject><subject>Metallurgy</subject><subject>Microstructure</subject><subject>Steel</subject><subject>STEELS</subject><subject>ULTRAFINE GRAINS</subject><issn>0267-0836</issn><issn>1743-2847</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNqFkUlLBDEQhYMoOC53j8GDt9YsTRY8ibgielHw1lRnkUhPokkamX9vz4wgCOqpisf3HtQrhA4oOaZU6hMqW85US-QzFUoTsoFmS6mZNLmJZoQJ2RDFxTbaKeWVECK01jN0e-G9MxUnj-97nCK2iwjzYHCpGULEIdrROIthLNXFUB2uCXuX82rNEItPeQ41pLiHtjwMxe1_zV30dHnxeH7d3D1c3Zyf3TWmVao2gjoALVvoQbXWaeC8d97SXnI2aZIyopjoGUjDLUilrBCt4MoSZUCC47voaJ37ltP76Ert5qEYNwwQXRpLx1slWi3IvyDTjGnO6AQe_gBf05jjdETHCKViCltCZA2ZnErJzndvOcwhLzpKuuULup8vmCzN2lLgxX1n_sGfrvkQV61-pDzYrsJiSNlPXZswXfer-xMwT5ja</recordid><startdate>20070401</startdate><enddate>20070401</enddate><creator>Rios, P. 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R.</au><au>de S. Bott, I.</au><au>Santos, D. B.</au><au>de Melo, T. M. F.</au><au>Ferreira, J. L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Nb on dynamic strain induced austenite to ferrite transformation</atitle><jtitle>Materials science and technology</jtitle><date>2007-04-01</date><risdate>2007</risdate><volume>23</volume><issue>4</issue><spage>417</spage><epage>422</epage><pages>417-422</pages><issn>0267-0836</issn><eissn>1743-2847</eissn><coden>MSCTEP</coden><abstract>Dynamic strain induced transformation (DSIT) is an interesting processing route to obtain ultrafine ferrite grains. In the present work, the effect of Nb on DSIT was investigated. Samples of low C-Mn steels, with and without Nb, were intensively deformed in hot torsion, aiming at the production of ultrafine ferrite grains. After soaking at 1200°C, the samples were cooled to 1100°C, submitted to hot torsion deformation to decrease the grain size and then cooled to 900, 850 or 800°C for further hot torsion deformation. In the steel without Nb, recrystallisation took place before enough deformation could be accumulated to induce ferrite formation, so DSIT would only take place at the lowest temperature investigated, 800°C. In the Nb steel, Nb addition delayed austenite recrystallisation, allowing DSIT ferrite to form at higher temperature than in the steel without Nb, 850°C.</abstract><cop>London, England</cop><pub>Taylor & Francis</pub><doi>10.1179/174328407X168900</doi><tpages>6</tpages></addata></record> |
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| ispartof | Materials science and technology, 2007-04, Vol.23 (4), p.417-422 |
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| source | SAGE Complete A-Z List |
| subjects | Alloys AUSTENITE FERRITE Hot rolling HOT TORSION Metallurgy Microstructure Steel STEELS ULTRAFINE GRAINS |
| title | Effect of Nb on dynamic strain induced austenite to ferrite transformation |
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