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:
Intragranular bainite is known to be effective to develop toughness greatly in steels.Effects of aging below eutectoid temperature before austenitization, the deformation before solutiontreatment and the duration of solution treatment on nucleation of intragranular bainite have beenexamined. In the austenite (γ) region where carbide pre-existed, the stress due to inversetransformation, ferrite (α) to γ, would be introduced into fine austenitized region with lower transustemperature to γ, resulting in the introduction of stable small-angle boundary at high temperaturesacting as the nucleation site for intragranular bainite lath. Deformation of α by cold rolling beforesolution treatment enhances the nucleation of intragranular bainite, suggesting that the above γregion through the inverse transformation is easily deformed by the hardened neighboring α. In thedeformed γ region, small-angle boundary would be more easily introduced, acting as nucleation sitefor intragranular bainite. Intragranular bainite lath grew and hardness decreased by prolonging theduration of solution treatment, indicating that transformation stress introduced by the pre-treatmentwas influenced by solution treatment. The effect of sulfur addition on formation of intragranularbainite was also analyzed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.2053.pdf
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