Application of laser remelting process on the Zr-Cu based alloy composite
| Autor: | Hou-Guang Chen, Huei Sen Wang, Yi Ting Liu, J.S.C. Jang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Amorphous metal Materials science Mechanical Engineering Alloy Composite number Metals and Alloys 02 engineering and technology General Chemistry engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Indentation hardness Grain size Corrosion Mechanics of Materials Phase (matter) 0103 physical sciences Materials Chemistry engineering Composite material 0210 nano-technology |
| Zdroj: | Intermetallics. 95:11-18 |
| ISSN: | 0966-9795 |
| Popis: | In this study, a 1.0 mm thick (Zr48Cu32Al8Ag8,Ta4)Si0.75 alloy composite (AC) plate was laser remelted (LR) by employing the Nd:YAG laser technique. To fully remelt the plate, a two-sided welding process with preselected parameters was employed. The microstructure, mechanical (microhardness), thermal properties, and corrosion resistance (potentiodynamic polarization) of the laser remelted alloy composite (LR-AC), the Zr-Cu AC (with the crystalline structure), and the Zr-Cu based bulk metallic glass composite (BMGC, the same composition as the AC. The amorphous matrix is produced by a rapid cooling rate) were then investigated and compared. The test results show that after the laser remelting processes, the LR-AC consisted of an amorphous matrix and reinforced phase, Ta, in the remelted areas, which is similar to the BMGC; however, the volume fractions and grain size of the micro-sized reinforced phase, Ta, in the LR-AC were reduced. When compared to those of the BMGC, the GFA indices of LR-AC were slightly improved. For the hardness tests, LR-AC showed a similar hardness to that of the BMGC; however, a higher value was obtained when compared to that of the AC. Furthermore, the LR-AC exhibits a lower Icorr (a slower corrosion rate), which is attributed to the amorphous matrix and less micro-sized Ta content, eliminating corrosion occurring between the Ta and the matrix of the alloy. |
| Databáze: | OpenAIRE |
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