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http://dx.doi.org/10.5781/KWJS.2008.26.1.076

Precipitation and Precipitate Coarsening Behavior According to Nb Addition in the Weld HAZ of a Ti-containing Steel  

Moon, Joon-Oh (Division of Materials Science and Engineering, Hanyang University)
Lee, Chang-Hee (Division of Materials Science and Engineering, Hanyang University)
Publication Information
Journal of Welding and Joining / v.26, no.1, 2008 , pp. 76-82 More about this Journal
Abstract
The effect of Nb addition on the precipitation and precipitate coarsening behavior was investigated in Ti and Ti + Nb steel weld HAZ. A dilatometer equipped with a He-quenching system was used to simulate the weld thermal cycle. Compared to $TiC_yN_{1-y}$ precipitate in a Ti containing steel, $Ti_xNb_{1-x}C_yN_{1-y}$ complex particle with addition of Nb is precipitated in a Ti + Nb containing steel. Meanwhile, precipitate coarsening occurred more easily in Ti + Nb steel, which may be because the high temperature stability of $Ti_xNb_{1-x}C_yN_{1-y}$ complex particle is deteriorated by the Nb addition.
Keywords
$Ti_xNb_{1-x}C_yN_{1-y}$; Precipitation; Coarsening; Heat Affected Zone;
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