Multiaxial low-cycle thermo-mechanical fatigue of a low-alloy martensitic steel: Cyclic mechanical behaviour, damage mechanisms and life prediction

被引：31

作者：

Bartosak, Michal ^{[1
]}

Horvath, Jakub ^{[2
]}

Spaniel, Miroslav ^{[1
]}

机构：

[1] Czech Tech Univ, Ctr Adv Aerosp Technol, Fac Mech Engn, Dept Mech Biomech & Mechatron, Tech St 4, Prague 16607, Czech Republic

[2] Czech Tech Univ, Ctr Adv Aerosp Technol, Fac Mech Engn, Dept Mat Engn, Charles Sq 13, Prague 12135, Czech Republic

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 151卷

关键词：

Low-cycle fatigue; Thermo-mechanical fatigue; Life prediction; Non-proportional loading; Critical plane approach; HIGH-TEMPERATURE; CREEP-FATIGUE; HOLD TIME; SUPERALLOY; OXIDATION; FREQUENCY; PARAMETER; TENSILE; MODEL; LCF;

D O I：

10.1016/j.ijfatigue.2021.106383

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Axial-torsional Low-Cycle Fatigue tests (LCF) and Thermo-Mechanical Fatigue tests (TMF) were performed on a low-alloy martensitic steel for temperatures between 300 degrees C and 600 degrees C, as both proportional and nonproportional. The results show that non-proportional loading leads to an increase in fatigue damage and to a decrease in the observed lifetime. The TMF damage model is proposed here in order to incorporate the effects of multiaxial loading and varying temperatures. This damage model is based on a critical plane approach, and it incorporates the fatigue, oxidation and creep forms of damage. Finally, the proposed model is validated for a large experimental database.

引用

页数：14

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