Forming limit in thermal cruciform biaxial tensile testing of titanium alloy
| Autor: | Kang-Ning Liu, Lihui Lang, Rui Xiao, Qiu Song, Xiaoxing Li |
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| Rok vydání: | 2017 |
| Předmět: |
0209 industrial biotechnology
Materials science Metals and Alloys Titanium alloy Biaxial tensile test 02 engineering and technology 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Finite element method Computer Science Applications 020901 industrial engineering & automation Cruciform Modeling and Simulation Ceramics and Composites Fracture (geology) Composite material 0210 nano-technology Anisotropy Necking Tensile testing |
| Zdroj: | Journal of Materials Processing Technology. 240:354-361 |
| ISSN: | 0924-0136 |
| DOI: | 10.1016/j.jmatprotec.2016.10.016 |
| Popis: | In this study, a new cruciform biaxial tensile testing technology was employed to evaluate the thermal limit strains of a TA1 titanium alloy, which is widely used as an aircraft structural component, so as to prevent fracture defects during thermoplastic processing. The effect of specimen shape on the forming limit and its measurement range is discussed. The results of this study show that a design that reduces the semispherical thickness results in localized necking and fracture at the center of the specimen when normal stress is applied to it. The forming limit diagrams obtained at different angles with respect to the material rolling direction suggested that the limit strain was anisotropic in nature. The experimental results were in good agreement with the substituted values obtained from the finite element analysis and Oyane ductile fracture criterion. Finally, the efficacy of the related test and prediction methods was corroborated. |
| Databáze: | OpenAIRE |
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