A201 改良9Cr-1Mo鋼溶接継手のクリープ損傷予測法の開発(材料強度評価-1,OS-6 保全・設備診断技術(3),一般講演,地球温暖化防止と動力エネルギー技術)

概要

論文の詳細を見る
In this study, creep tests have been conducted on a P91 to identify creep rupture life property of the weld joints, and creep damage process in heat affect zone (HAZ) has been clarified by producing creep damaged materials. As results, it was found that creep rupture time of the weld joints reduced to about 1/5 of the base metal and creep voids have already initiated at 20% of the creep life in the HAZ. Size and number of voids in the HAZ increased with increasing creep damage. Creep rupture time of the weld joint can be predicted by creep strain rate in the HAZ and limited creep strain defined in this study. It was confirmed that quantitative void growth behavior could be predicted by the void growth simulation method.
社団法人日本機械学会の論文
2008-06-18