High-temperature tensile behavior of AZ61 magnesium plate prepared by multi-pass friction stir processing
| Autor: | Daolun Chen, Cheng Qiu, Da Tong Zhang, X.C. Luo, Genghua Cao |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Friction stir processing 020502 materials Mechanical Engineering 02 engineering and technology Strain rate 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Grain size 0205 materials engineering Mechanics of Materials Ultimate tensile strength General Materials Science Texture (crystalline) Composite material Deformation (engineering) 0210 nano-technology Anisotropy |
| Zdroj: | Materials Science and Engineering: A. 759:234-240 |
| ISSN: | 0921-5093 |
| Popis: | Multi-pass friction stir processing (M-FSP) was used to produce large-scale AZ61 Mg plate with fine-grained structures. High-temperature tensile behavior of the M-FSP plate was investigated along different directions in a temperature range of 473–673 K at a strain rate of 1 × 10−2 s−1∼3 × 10−5 s−1, respectively. Microstructural evolution and texture change during high-temperature deformation were studied. The fine-grained plate with an average grain size of 7.8 ± 6.4 μm has been attained via M-FSP, while the microstructure is not homogeneous. The M-FSP plate is observed to exhibit tensile anisotropy at elevated temperatures. The highest elongation is obtained along the processing direction, with the maximum value of 211% achieved at 623 K and 3.3 × 10−4 s−1 due to the lower intensity of texture and higher value of Schmid factor with respect to this direction. Effects of grain structure inhomogeneity and texture on the high-temperature tensile behavior of the M-FSP plate are discussed. |
| Databáze: | OpenAIRE |
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