Creep deformation and rupture behaviour of directionally solidified GTD 111 superalloy

被引：38

作者：

Ibanez, A. R.

Srinivasan, V. S.

Saxena, Ashok

机构：

[1] SC Bariloche, INVAP SE, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Univ Arkansas, Dept Mech Engn, Coll Engn, Fayetteville, AR 72701 USA

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2006年 / 29卷 / 12期

关键词：

creep rupture; directionally solidified superalloy; neural network; theta projection;

D O I：

10.1111/j.1460-2695.2006.01066.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The creep behaviour of directionally solidified (DS) Ni-base superalloy GTD 111 has been investigated at various temperatures (649 degrees C to 982 degrees C) and stresses (124 MPa to 896 MPa). Specimens machined in longitudinal and transverse directions with respect to the grain orientation from three batches of the material were tested. The specimens in the longitudinal direction consistently exhibited higher creep rupture life and creep ductility than specimens from the transverse direction. There were some systematic variations in creep deformation and rupture behaviour among specimens from different batches. Optical and scanning electron microscopy investigations were conducted to understand the creep rupture behaviour. Various deformation and rupture models were evaluated for representing the creep behaviour of the alloy and a neural network model was applied to creep rupture data to assess its predictive capability.

引用

页码：1010 / 1020

页数：11

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