Characterisation of creep cavitation damage in a stainless steel pressure vessel using small angle neutron scattering

被引:9
|
作者
Bouchard, PJ
Fiori, F
Treimer, W
机构
[1] Univ Ancona, Ist Nazl Fis Mat, Res Unit Ancona, I-60131 Ancona, Italy
[2] Univ Ancona, Ist Sci Fis, I-60131 Ancona, Italy
[3] Tech Fachhsch Berlin, D-13353 Berlin, Germany
[4] HMI, BENSC, D-14109 Berlin, Germany
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2002年 / 74卷 / Suppl 1期
关键词
PACS: 61.12.Ex; 62.20.Hg;
D O I
10.1007/s003390201728
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Grain-boundary cavitation is the dominant failure mode associated with initiation of reheat cracking, which has been widely observed in austenitic stainless steel pressure vessels operating at temperatures within the creep range (> 450degreesC). Small angle neutron scattering (SANS) experiments at the LLB PAXE instrument (Saclay) and the V12 double-crystal diffractometer of the HMI-BENSC facility (Berlin) are used to characterise cavitation damage (in the size range R = 10-2000 nm) in a variety of creep specimens extracted from ex-service plant. Factors that affect the evolution of cavities and the cavity-size distribution are discussed. The results demonstrate that SANS techniques have the potential to quantify the development of creep damage in type-316H stainless steel, and thereby link microstructural damage with ductility-exhaustion models of reheat cracking.
引用
收藏
页码:S1689 / S1691
页数:3
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