High Temperature Mechanical Constitutive Modeling of a High-Nb TiAl Alloy
High Temperature Mechanical Constitutive Modeling of a High-Nb TiAl Alloy
- Neue Suche nach: DONG Chengli
- Neue Suche nach: YU Huichen
- Neue Suche nach: JIAO Zehui
- Neue Suche nach: KONG Fantao
- Neue Suche nach: CHEN Yuyong
- Neue Suche nach: DONG Chengli
- Neue Suche nach: YU Huichen
- Neue Suche nach: JIAO Zehui
- Neue Suche nach: KONG Fantao
- Neue Suche nach: CHEN Yuyong
Uniaxial tensile, low cycle fatigue, fatigue-creep interaction and creep experiments of a novel high-Nb TiAl alloy (i.e. Ti-45Al-8Nb-0.2W-0.2B-0.02Y (atom fraction/%)) were conducted at 750℃ to obtain its tested data and curves. Based on Chaboche visco-plasticity unified constitutive model, Ohno-Wang modified non-linear kinematic hardening was introduced in Chaboche constitutive model to describe the cyclic hardening/softening, and Kachanov damage was coupled in Chaboche constitutive model to characterize the accelerated creep stage. The differential equations of the constitutive model discretized by explicit Euler method were compiled in to ABAQUS/UMAT to simulate the mechanical behavior of high-Nb TiAl alloy at different test conditions. The results show that Chaboche visco-plasticity unified constitutive model considering both Ohno-Wang modified non-linear kinematic hardening and Kachanov damage is able to simulate the uniaxial tensile, low cycle fatigue, fatigue-creep interaction and creep behavior of high-Nb TiAl alloy and has high accuracy.
Dokumentinformationen
High Temperature Mechanical Constitutive Modeling of a High-Nb TiAl Alloy
2018
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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