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Outline
SLM-AlSi10Mg aluminum master alloy is compared to differently heat-treated LM-AlSi10Mg aluminum alloys and ZL104 cast aluminum alloy for investigating the difference in microstructure and mechanical properties. It is shown that the base material has a tensile strength of 545 MPa and plasticity of 5.28%, and also has similar microstructure and mechanical properties after direct aging treatment, indicating this heat treatment is ineffective for the alloy; after the base material is subjected to solution-aging treatment, the α-Al matrix is transformed into equiaxed crystals with a grain size of about 2 μm and the second phase presents as dispersed spherical particles, which weakens the splitting effect of reticular eutectic Si on the Al matrix. Such heat-treated alloy has the tensile strength of 391 MPa, which is lower than that of base mater but higher than that of ZL104, and has the plasticity of 14.09%, which is significantly higher compared to the base material and ZL104, indicating that such heat treatment is effective. After solution-aging treatment, the SLM-AlSi10Mg alloy exhibits better mechanical properties compared to the commonly used ZL104 cast aluminum alloy, thus is considered to replace ZL104 cast aluminum alloy in practical engineering applications, which can not only reduce the manufacturing cost of aluminum alloy parts but also improve production efficiency.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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