Crystal Plasticity Finite Element Modeling on High Temperature Low Cycle Fatigue of Ti2AlNb Alloy

被引：3

作者：

Wang, Yanju ^{[1
]}

Zhang, Zhao ^{[2
]}

Wang, Xinhao ^{[2
]}

Yang, Yanfeng ^{[2
]}

Lan, Xiang ^{[1
]}

Li, Heng ^{[2
]}

机构：

[1] AECC Beijing Inst Aeronaut Mat, Mat Evaluat Ctr Aeronaut & Aeroengine Applicat, Beijing 100095, Peoples R China

[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

APPLIED SCIENCES-BASEL | 2023年 / 13卷 / 02期

基金：

中国国家自然科学基金; 日本学术振兴会;

关键词：

Ti2AlNb alloy; low cycle fatigue; Chaboche model; crystal plasticity finite element; MICROSTRUCTURE; DEFORMATION; BEHAVIOR; PHASE;

D O I：

10.3390/app13020706

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ti2AlNb alloy is a three-phase alloy, which consists of O phase, beta phase and alpha(2) phase. Because of the difference in the mechanical characteristics between phases, Ti2AlNb alloy often exhibits deformation heterogeneity. Based on EBSD images of the Ti2AlNb alloy, a crystal plasticity finite element model (CPFEM) was built to study the effects of O phase and beta phase (dominant phases) on stress and strain distribution. Four types of fatigue experiments, and the Chaboche model with 1.2%similar to 1.6% total strain range were conducted to verify the CPFEM. The simulation results showed that the phase boundary was the important position of stress concentration. The main reason for the stress concentration was the inconsistency deformation of grains which resulted from the different deformation abilities of the O and beta phases.

引用

页数：13

共 39 条

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