Anisotropy Influence on the Failure of Ti6Al4V Sheets Deformed at Room and Elevated Temperature

被引:1
|
作者
Wang, Q. L. [1 ]
Ghiotti, A. [1 ]
Bruschi, S. [1 ]
机构
[1] Univ Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy
来源
PROCEEDINGS OF 21ST INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING (ESAFORM 2018) | 2018年 / 1960卷
关键词
D O I
10.1063/1.5035056
中图分类号
O59 [应用物理学];
学科分类号
摘要
Ti6Al4V sheets are usually difficult-to-form at room temperature as a consequence of their strong basal texture and hcp crystal lattice. The heating of the alloy below the beta transus temperature is recognized to enhance its formability, reducing the flow stress and increasing the ductility. However, the influence of the sheet anisotropy on the material failure hasn't been studied yet. To this aim, the paper presents the anisotropy influence on the failure characteristics of Ti6Al4V titanium alloy sheets making use of tensile tests carried out at room temperature and 600 degrees C on smooth, notched and shear samples in order to have various stress states. The fracture strain is measured and the effect of the sample orientation and stress state is identified. To determine the actual stress state for each sample geometry, a numerical model is set up and calibrated using elasto-plastic data from uni-axial tensile tests on smooth samples. Finally, the fracture surfaces are observed through SEM analysis to explain the failure characteristics.
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页数:6
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