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首页> 外文期刊>Materials Science and Engineering >Interactive effects of grain refinement, eutectic modification and solidification rate on tensile properties of Al-lOSi alloy
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Interactive effects of grain refinement, eutectic modification and solidification rate on tensile properties of Al-lOSi alloy

机译：细化，共晶改性和凝固速率对Al-lOSi合金拉伸性能的相互作用

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摘要

This study aims to clarify the effect of grain size and Si modification on the microstructure and tensile properties of the Al-lOSi cast alloy, solidified under various cooling rates. To replicate the effect of cooling rate, direc-tionally solidified samples were produced by remelting of the as-cast cylindrical bars. Tensile properties, grain sizes, Si modification level and chemical composition profiles were evaluated. Results showed that fast cooling rates alone, without the addition of grain refiners (Al-5Ti-lB master alloy), did not lead to equiaxed grain morphologies. On the other hand, for the slowest cooling rate tested, combined additions of the Al-5Ti-lB and the Al-lOSr master alloys resulted in equiaxed grain structures while addition of only grain refiner resulted in columnar grains. The combined additions effectively produced an equiaxed grain structure at all cooling rates tested, and further improved the tensile properties.
机译：这项研究旨在阐明晶粒尺寸和硅改性对在各种冷却速率下凝固的Al-10OSi铸造合金的组织和拉伸性能的影响。为了复制冷却速度的影响，通过重新铸造铸态的圆柱棒来产生定向凝固的样品。评估了拉伸性能，晶粒尺寸，Si改性水平和化学成分分布。结果表明，单独的快速冷却速度而不添加晶粒细化剂（Al-5Ti-1B中间合金）并不会导致等轴晶形貌。另一方面，对于测试的最慢冷却速度，Al-5Ti-1B和Al-10rS中间合金的组合添加导致等轴晶组织，而仅添加晶粒细化剂则导致柱状晶粒。组合的添加物在所有测试的冷却速率下均有效地产生了等轴晶组织，并进一步改善了拉伸性能。

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