Low cycle fatigue modeling for nickel-based single crystal superalloy

被引：10

作者：

Tang, Haibin ^{[1
]}

Guo, Haiding ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Collaborat Innovat Ctr Adv Aeroengine, Jiangsu Prov Key Lab Aerosp Power Syst, Nanjing, Jiangsu, Peoples R China

来源：

MATERIALS AT HIGH TEMPERATURES | 2018年 / 35卷 / 06期

关键词：

Nickel-based single crystal superalloy; low cycle fatigue; crystallographic orientation; load ratio; stress concentration; HIGH-TEMPERATURE FATIGUE; FIELD INTENSITY APPROACH; NI-BASED SUPERALLOY; CRACK INITIATION; MECHANICAL-BEHAVIOR; LIFE PREDICTION; CREEP-BEHAVIOR; CRITICAL PLANE; TURBINE BLADE; SC SUPERALLOY;

D O I：

10.1080/09603409.2018.1429042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The low cycle fatigue (LCF) characteristics of nickel-based single crystal (SC) superalloy have been experimentally and numerically investigated. The effects of crystallographic orientation, load ratio and stress concentration are studied. In order to model the effect of crystallographic orientation, a new orientation factor, which is relevant to the yield strength, is constructed. On the other hand, a new asymmetrical loading factor is introduced to describe the effect of load ratio. The LCF model for SC superalloy smooth specimen is established with these new damage parameters. The effect of the strain gradient on the LCF life of SC superalloy is further studied, which is applied to the evaluation of the LCF life of SC superalloy notched specimen. The LCF model proposed is validated by the experimental data of SC superalloy DD3 and PWA1480.

引用

页码：535 / 545

页数：11

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