Non-destructive evaluation of creep damage of Ni-based superalloy using a scanning blue laser microscope

被引：1
|
作者：
Akahoshi, Kuniaki [1 ]
Ogawa, Kazuhiro [1 ]
Miura, Hideo [1 ]
机构：
[1] Tohoku Univ, Grad Sch Engn, Fracture & Reliabil Res Inst, Aoba Ku, Sendai, Miyagi 9808579, Japan
来源：
PROGRESSES IN FRACTURE AND STRENGTH OF MATERIALS AND STRUCTURES, 1-4 | 2007年 / 353-358卷
关键词：
non-destructive evaluation; creep damage; Ni-based superalloy; scanning laser microscope;
D O I：
10.4028/www.scientific.net/KEM.353-358.2391
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to assure the reliability of advanced gas turbine systems, it is very important to evaluate the damage of high temperature materials such as Ni-based superalloys under creep and fatigue conditions quantitatively. The refractive index of the gamma-prime phase is found to be smaller than that of the gamma phase in the Ni-based superalloy, when the wavelength of an irradiated laser beam is shorter than 500 nm. Therefore, it is possible to evaluate the creep damage of this material quantitatively and non-destructively by observing the change of the micro texture in a grain (rafting) using a scanning laser microscope.
引用
收藏
页码：2391 / 2394
页数：4
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