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Effect of Solidification Times on Crack Opening Displacement of Aluminum Alloy Castings

机译:凝固时间对铝合金铸件开裂位移的影响

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摘要

The effects of mold temperature, solidification time, and metallurgical structure on both the crack-tip opening displacement (COD) at maximum load and ultimate tensile strength (UTS) of Al-10.6Si, 0.9Mg, 0.9Cu alloy have been investigated. Seven alloy melt samples poured into a copper mold, which was pre-heated at different temperatures, were allowed to solidify at different cooling rates. Even though it was found that the COD values increase and the UTS decreases as the mold temperature and solidification time increase, these parameters could be related o microstructural differences such as silicon crystals size in an alpha-aluminum matrix.
机译:研究了模具温度,凝固时间和冶金结构对Al-10.6Si,0.9Mg,0.9Cu合金最大载荷下的裂纹尖端开口位移(COD)和极限抗拉强度(UTS)的影响。倒入铜模具中的七个合金熔体样品在不同的温度下预热,然后在不同的冷却速率下固化。即使发现随着模具温度和凝固时间的增加,COD值增加而UTS减少,但这些参数可能与微观结构差异有关,例如α-铝基质中的硅晶体尺寸。

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