DETERMINATION OF LASER SHOCK-TREATMENT CONDITIONS FOR FATIGUE TESTING OF NI-BASED SUPERALLOYS

被引：8

作者：

FORGET, P ^{[1
]}

JEANDIN, M ^{[1
]}

LYORET, A ^{[1
]}

机构：

[1] SNECMA,CTR CORBEIL,DEPT MAT & PROC,F-91003 EVRY,FRANCE

来源：

JOURNAL DE PHYSIQUE IV | 1993年 / 3卷 / C7期

关键词：

D O I：

10.1051/jp4:19937142

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It is envisaged that laser shock surface treatment may be used to surface harden and improve the mechanical properties of materials by inducing compressive stresses. This study deals with its application to the high performance aeronautical Ni-based superalloy Astroloy for turbine discs and its effect on low-cycle fatigue resistance. X-ray diffraction was used to measure the surface and in-depth stress distributions. The prominent features of laser shock processing have been studied by an analytical approach to the main physical phenomena occurring successively during the impact. This led to an adequate treatment of conventionnal cylindrical low-cycle fatigue specimens. Fatigue tests were then conducted on Astroloy at 550 degrees C. These showed the beneficial effect of laser shock processing.

引用

页码：921 / 926

页数：6