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Tensile Creep Behavior of NiAl-9Mo Eutectic Alloy

机译:NiAl-9Mo共晶合金的拉伸蠕变行为

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摘要

The tensile creep behavior of NiAl-9Mo eutectic alloy has been investigated over a stress range of 50 to 100MPa at the temperatures ranging from 850 to 950℃. All of the creep curves exhibit the very long steady-state stage. The creep parameters and TEM observations indicates the kinetics of the steady-state creep deformation is governed by dislocation climb in the NiAl matrix phase. The crack origination and development at the colony boundary results in the onset of tertiary creep stage and final fracture of the alloy.
机译:NiAl-9Mo共晶合金的拉伸蠕变行为已在850至950℃的温度范围内的50至100 MPa应力范围内进行了研究。所有的蠕变曲线都表现出非常长的稳态阶段。蠕变参数和TEM观察表明,稳态蠕变变形的动力学受NiAl基体相中位错爬升的控制。菌落边界处裂纹的产生和发展导致合金的第三蠕变阶段的开始和最终断裂。

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