| Autor: |
XING Xuegang, CHANG Chao, YANG Xuexia, HAO Xin, WANG Yongsheng |
| Zdroj: |
Journal of Functional Materials / Gongneng Cailiao; 2023, Vol. 54 Issue 12, p12225-12230, 6p |
| Abstrakt: |
Nanoindentation tests were conducted on in-situ Al3Ti particulate reinforced Al-7Si alloy to investigate the strain rate sensitivity at room temperature. The indenter was loaded to a fixed maximum load with different loading strain rates. Hardness was investigated based on continuous stiffness measurement. Results show that the eutectic Si in Al3Ti particulate reinforced Al-7Si is modified to short fibrous morphology due to addition of Sr. Al3Ti particulate reinforced Al-7Si exhibits dependence on loading strain rate in terms of hardness. T6 heat treatment spheroidizes eutectic Si phases into round Si particles. Microstructure uniformity of materials is enhanced and the strain rate sensitivity becomes less pronounced. Strain rate sensitivity of the specimen is improved after cryogenic treatment, along with the refinement of α-Al grains and eutectic Si. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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