Damage in nickel base superalloy: Influence of local parameters measured by electron backscattered diffraction and atomic force microscopy

被引：16
作者：
Risbet, M. [1 ]
Feaugas, X. [2 ]
Guillemer-Neel, C. [3 ]
Clavel, M. [4 ]
机构：
[1] Univ Technol Compiegne, CNRS, UTC, Lab Roberval,UMR 6253, F-60205 Compiegne, France
[2] Univ La Rochelle, Lab Etud Mat Milieux Agressifs, EA 3127, F-17000 La Rochelle, France
[3] IUT Genie Mecan Amiens, EA 3899, Lab Technol Innovantes, F-80025 Amiens, France
[4] Ecole Cent Paris, Lab Mecan Sols Struct & Mat, CNRS, UMR 8579, F-92295 Chatenay Malabry, France
来源：
SCRIPTA MATERIALIA | 2009年 / 60卷 / 05期
关键词：
Damage initiation; Schmid factor; Scaling behaviour; Atomic force microscopy; Nickel-based superalloy; FATIGUE-CRACK INITIATION; PLASTIC-DEFORMATION; SURFACE-RELIEF; AFM; ALUMINUM;
D O I：
10.1016/j.scriptamat.2008.06.053
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The low-cycle fatigue behaviour of a nickle-based superalloy has been investigated with regard to its surface damage features. This alloy endures localized plastic deformation confined in slip bands emerging as extrustions. The correlations between damage, grain orientation, the Schmid factor of slip systems and the height of extrusions have been questioned. It is proved here that reaching a critical height value is not a sufficient condition for an extrusion to induce the apparition of a transgranular crack. (C) 2008 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
引用
收藏
页码：269 / 272
页数：4
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