EFFECT OF THERMAL AGING ON FRACTURE-TOUGHNESS OF RPV STEEL

被引：17

作者：

FUKAKURA, J ^{[1
]}

ASANO, M ^{[1
]}

KIKUCHI, M ^{[1
]}

ISHIKAWA, M ^{[1
]}

机构：

[1] TOSHIBA CO LTD,NUCL ENERGY GRP,ISOGO KU,YOKOHAMA,KANAGAWA 235,JAPAN

来源：

NUCLEAR ENGINEERING AND DESIGN | 1993年 / 144卷 / 03期

关键词：

D O I：

10.1016/0029-5493(93)90037-A

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The effect of thermal aging on mechanical properties and fracture toughness was investigated on pressure vessel steel of light water reactors. Submerged are welded plates of ASME SA508 C1.3 steel were isothermally aged at 350 degrees C, 400 degrees C and 450 degrees C for up to 10,000 hrs. Tensile, Charpy impact and fracture toughness testings were conducted on the base metal and the weld heat affected zone (HAZ) material to evaluate whether thermal aging induced by the plant operation is critical for the integrity of the pressure vessel or not. Tensile properties of the base metal was not changed by thermal aging as far as the thermal aging conditions were concerned. Relatively distinct degradation was observed in fracture toughness J(IC) and J-resistance properties of both the base metal and the weld HAZ material, while only slight changes were observed in Charpy impact properties for both of them. However, it was concluded that the effect of thermal aging estimated by 40-80 years of plant operation on fracture toughness of both materials is small.

引用

页码：423 / 429

页数：7