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JWJ > Volume 26(1); 2008 > Article
Journal of KWJS 2008 February;26(1) :76-82.
Published online March 21, 2008.
Precipitation and Precipitate Coarsening Behavior According to Nb Addition in the Weld HAZ of a Ti-containing Steel
Joonoh Moon, Changhee Lee

Correspondence:   Published online March 21, 2008
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<SUB>y</SUB>N<SUB>1-y</SUB> precipitate in a Ti containing steel, Ti<SUB>x</SUB>Nb<SUB>1-x</SUB>C<SUB>y</SUB>N<SUB>1-y</SUB> 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<SUB>x</SUB>Nb<SUB>1-x</SUB>C<SUB>y</SUB>N<SUB>1-y</SUB> complex particle is deteriorated by the Nb addition.
Keywords: Ti<SUB>x</SUB>Nb<SUB>1-x</SUB>C<SUB>y</SUB>N<SUB>1-y</SUB>;Precipitation;Coarsening;Heat Affected Zone
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