[S10] S10 Materials Integration (IV) -Endeavors toward social implementation- (1)

[S10.10] Creep damage classification of 2 1/4 Cr steel welded joints depending on HAZ shape

*Hitoshi IZUNO¹, Masahiko Demura¹, Masayoshi Yamazaki¹, Masaaki Tabuchi², Daisuke Abe³, Keisuke Torigata³ (1. Research and Service Division of Materials Data and Integrated System (MaDIS), NIMS, 2. Research Center for Structural Materials, NIMS, 3. Corp. Research & Development, IHI Corp.)

Keywords:Damage Analysis、Classification、Material Integration、Weld Joint、2 1/4Cr Steel、Creep Property、Heat Affected Zone

2 1/4Cr材溶接継手に対し，溶接条件の違いに起因する様々なHAZ形状に対するクリープ損傷を計算機上で再現し，類型を解析した．HAZ内部破断となるようなHAZ形状でのクリープ寿命は最大で母材寿命の0.8倍に達した．