High temperature low cycle fatigue deformation behaviour of forged IN 718 superalloy turbine disc

被引：46

作者：

Prasad, Kartik ^{[1
]}

Sarkar, Rajdeep ^{[1
]}

Ghosal, P. ^{[1
]}

Kumar, Vikas ^{[1
]}

Sundararaman, M. ^{[2
]}

机构：

[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

[2] Univ Hyderabad, Hyderabad 500046, Andhra Pradesh, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 568卷

关键词：

Nickel base superalloys; Fatigue; Electron microscopy; TITANIUM-ALLOY; ROOM-TEMPERATURE; INCONEL-718; MECHANISMS; STRESSES; PRECIPITATION; PLASTICITY; CREEP;

D O I：

10.1016/j.msea.2012.12.069

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the present investigation, low cycle fatigue deformation behaviour of forged turbine disc of IN 718 superalloy of different sections (rim, hub, and bore) was studied under asymmetrical waveforms (slow-fast and fast-slow) at 650 degrees C. The superalloy exhibited dynamic strain aging (DSA) by showing the manifestation of serrations during the lower strain rate plastic region of the hysteresis loop under asymmetrical waveforms. Irrespective of different sections, the superalloy showed marginally reduced fatigue life under slow-fast waveform as compared to fast-slow waveform. This was attributed to higher accumulation of LCF damage under slow-fast waveform as confirmed from slip band spacing than that of the fast-slow waveform. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：239 / 245

页数：7

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