| Mengqi Zhang,Jinshan Li,Bin Tang,Hongchao Kou,Jiangkun Fan.[J].自然科学进展英文版,2018,28(6):718-723 |
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| Mechanical characterization and strain-rate sensitivity measurement of Ti-7333 alloy based on nanoindentation and crystal plasticity modeling |
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| DOI： |
| 中文关键词: |
| 英文关键词:Nanoindentation
Crystal plasticity
Rate sensitivity
Pileup |
| 基金项目: |
| Author Name | Affiliation | | Mengqi Zhang | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China | | Jinshan Li | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China | | Bin Tang | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China | | Hongchao Kou | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China | | Jiangkun Fan | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China |
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| 中文摘要: |
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| 英文摘要: |
| The relationship between crystal orientations and meso-mechanical properties of β phase Ti-7333 titanium was
investigated through the combination of nanoindentation experiments and simulation. The crystal plasticity
finite element (CPFE) model for nanoindentation of single body-centered cubic crystal was established based on
the experimental data. And the crystal plasticity constitutive law was implemented to simulate the nanoindentation
process, obtaining satisfied results with an acceptable error. From the simulated pileup morphology
patterns with different crystal orientations, it was found that the β phase experienced a symmetrical and
orientation-related deformation process. Meanwhile, the strain-rate sensitivity (SRS) of β phase was investigated
through nanoindentation tests based on continuous stiffness measurement (CSM) under different strain rates,
varying between 0.2, 0.05 and 0.01 s?1. Two grains with different orientations exhibited similar SRS exponents,
m, calculated from the experimental results. |
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