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基于Gurson塑性本构模型对含空穴和夹杂的镍基粉末冶金材料Fgh95进行了疲劳蠕变性能分析。采用K-R损伤模型对含空穴和夹杂的粉末冶金材料Fgh95进行了高温蠕变及疲劳-蠕变交互作用性能研究。结果表明:在疲劳载荷和高温蠕变载荷作用下,空穴比夹杂更易引起粉末冶金材料的损伤失效,相对高温蠕变载荷而言,疲劳-蠕变交互作用更易引起材料的破坏,且疲劳-蠕变交互作用对含夹杂材料的影响大于含空穴材料。
Based on the Gurson plastic constitutive model, the fatigue creep behavior of Fgh95, which contains holes and inclusions, was investigated. The K-R damage model was used to study the creep and fatigue-creep behavior of Fgh95, a porous and entangled powder metallurgy material. The results show that under the action of fatigue load and high temperature creep load, the hole-specific inclusions are more likely to cause damage failure of powder metallurgy materials, and the fatigue-creep interaction is more likely to cause material damage than the high temperature creep load, The effect of creep interaction on inclusion-containing material is greater than that of hole-containing material.