K-0825 Cr-Mo鋼溶接継手大型試験片におけるクリープ損傷分布(G03-11 クリープ疲労)(G03 材料力学部門一般講演)

概要

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Since a wall thickness of equipment used on an elevated temperature is getting thicker, it is very important to know differences between creep behavior on small specimens and that on large components. This paper shows size effects for creep damage distribution on HAZ (Heat Affected Zone) of Mod.9Cr-1Mo steel weld joints. Using φ 50mm and φ 10mm round bar weld joint specimens, creep tests were carried out on 650℃. Creep void area fractions were measured on HAZ in radius direction after the tests, and also were measured on the surface of HAZ during one of the tests. The creep damage distribution patterns of small specimens were very similar to a surface portion of the large specimen's pattern. With an increase in creep time the creep damage even on the surface of HAZ increased rapidly.
社団法人日本機械学会の論文
2001-08-22