Effect of aging treatment on mechanical properties and fracture behavior of friction stir processed Mg–Y–Nd alloy
| Autor: | Datong Zhang, Weiwen Zhang, Xicai Luo, Genghua Cao, Wen Zhang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Friction stir processing Precipitation (chemistry) Mechanical Engineering Metallurgy Alloy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Artificial aging Mechanics of Materials 0103 physical sciences Fracture (geology) engineering Friction stir welding General Materials Science Composite material 0210 nano-technology |
| Zdroj: | Journal of Materials Science. 51:7571-7584 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/s10853-016-0036-z |
| Popis: | In this study, precipitation behavior of Mg–Y–Nd cast alloy during friction stir processing (FSP), and the effect of subsequent artificial aging on mechanical properties and fracture behavior of the FSP alloy were investigated. It is found that the coarse α-Mg grains and large second phases are greatly refined after FSP. Moreover, due to the heat input during processing and the natural cooling, β′ and β1 precipitates are also observed in the FSP alloy. The FSP specimens were subjected to subsequent artificial aging treatment, and the peak hardness is obtained at 150 °C for 54 h and 180 °C for 30 h. Strengths of the peak–aged specimens are further increased, which is attributed to the large quantity of β″ and β1 precipitates, respectively. Meanwhile, elongations of the peak-aged specimens are both decreased. Due to the comprehensive effects of banded structures and fine grains, failure mechanisms of FSP and peak-aged specimens are all mixed ductile–brittle fracture mode. However, compared to the FSP specimens, different fracture paths are exhibited in peak–aged specimens. |
| Databáze: | OpenAIRE |
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