基于晶体塑性理论的镍基合金高温低周疲劳寿命预测方法OA
High temperature low cycle fatigue life prediction method of nickel based alloy based on crystal plasticity theory
对Inconel 718镍基合金进行高温拉伸试验和低周疲劳试验,借助晶体塑性有限元方法分析合金的疲劳裂纹萌生过程.结果表明:Inconel 718镍基合金的高温低周疲劳裂纹萌生寿命随着总应变范围的增大而缩短;该镍基合金的高温低周疲劳裂纹容易在三叉晶界处萌生,这些区域存在较大的累积塑性滑移.
The high temperature tensile test and low cycle fatigue test of Inconel 718 nickel based alloy were carried out,and the fatigue crack initiation process of the alloy was analyzed by crystal plasticity finite element method.The results show that the initiation life of high temperature low cycle fatigue crack of Inconel 718 nickel based alloy decreased with the increase of total strain range.The high temperature low cycle fatigue cracks of the nickel based alloy were easy to initiate at the trigeminal grain boundaries,and there was a large cumulative plastic slip in these areas.
缪勇
上海航空材料结构检测股份有限公司,上海 201318
金属材料
Inconel 718镍基合金高温低周疲劳寿命预测微观组织有限元模拟疲劳指示因子
Inconel 718 nickel based alloyhigh temperature low cycle fatigue life predictionmicrostructurefinite element simulationfatigue indicator factor
《理化检验-物理分册》 2024 (004)
25-30 / 6
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