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材料工程  2005 

镍基单晶合金DD3切口圆棒试样的蠕变响应有限元分析

Keywords: 镍基单晶合金,切口圆棒试样,蠕变响应,数值模拟

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Abstract:

针对切口圆棒试样,利用有限元方法模拟了国产镍基单晶合金DD3[001]取向的蠕变性能。计算结果表明切口半径对应力分布有显著的影响,切口半径越大,蠕变应力越大;切口深度对蠕变性能的影响不大;切口半径对持久寿命的影响作用非常大,切口半径越小,持久寿命越大。在所研究范围内,切口对试样持久寿命的强化作用,得到他人试验的验证。

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