Anisotropic response in mechanical and corrosion properties of hastelloy X fabricated by selective laser melting
| Autor: | Cheng Man, Decheng Kong, Xiaogang Li, Li Wang, Xiaoqing Ni, Jizheng Yao, Chaofang Dong, Kui Xiao, Liang Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Equiaxed crystals
Materials science Alloy 0211 other engineering and technologies Oxide 020101 civil engineering 02 engineering and technology Building and Construction Plasticity engineering.material 0201 civil engineering Corrosion chemistry.chemical_compound chemistry 021105 building & construction Perpendicular engineering General Materials Science Selective laser melting Composite material Anisotropy Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 221:720-729 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2019.06.132 |
| Popis: | Mechanical properties and corrosion behaviours of hastelloy X fabricated by selective laser melting (SLM) were investigated and compared with the wrought counterpart, and the anisotropy of the selective laser melted (SLMed) hastelloy X was also clarified in this work. Nano-inclusions (Mo-rich M 6 C) were widely distributed at the sub-grain boundaries in the SLMed hastelloy X alloy, whereas micron-scale precipitations existed in the wrought counterpart. The grain sizes of the hastelloy X fabricated by SLM on XOZ plane were slenderer than that on XOY plane (equiaxed grains), and the molten pool boundaries widely existed in the SLMed matrix, leading to poor plasticity and the XOY plane was worse due to the cracks perpendicular to the stretching direction. The corrosion resistance for the SLMed matrix was better than the wrought in the less aggressive solution due to the thicker oxide passive film, but the SLMed parts corroded faster in a severe environment once the voids and the molten pool boundaries started to dissolve. The corrosion depth for the SLMed hastelloy X was approximately three times larger than for the wrought and there was little difference on different planes for the SLMed matrix. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect