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本文研究了不同含钴量Refractoloy26合金的基体层错能和蠕变内应力对合金蠕交性能的影响关系。测定了不同含钴量合金的基体层错能(γs),以及在565℃时的蠕变内应力蠕变速率和断裂寿命。结果表明,降低含钴量使合金蠕变性能下降的主要原因是钴对合金基体层错能及蠕变内应力的影响。通过对基体成份相同,一类是γ′沉淀强化,一类是固溶强化合金中稳态蠕变速率与基体层错能及蠕变内应力间关系的研究,得到描述合金稳态蠕变速率的一般表达式:
In this paper, the relationship between the matrix layer fault energy and creep stress on the creep behavior of alloys with different amounts of cobalt in Refractoloy26 alloy was studied. The matrix layer fault energy (γs) and the creep creep rate and fracture life at 565 ℃ were measured. The results show that the main reason that the decrease of cobalt content decreases the creep property of the alloy is the effect of cobalt on the fault energy and creep internal stress of the alloy matrix. The first one is γ ’precipitation strengthening, the other is the study of the relationship between the steady-state creep rate in solid-solution strengthened alloy and the fault energy in the matrix layer and the creep internal stress. The steady-state creep rate The general expression: