N36锆合金包壳管的高温蠕变行为
发布时间:2018-10-09 20:21
【摘要】:研究了N36锆合金包壳管在温度为593~723 K、应力为60~160 MPa条件下的拉伸蠕变行为。结果表明,本试验条件下N36锆合金管材存在不同的蠕变变形机制。593~673K下低应力范围内,蠕变应力因子n约为3,蠕变表观激活能Qapp≈150 k J·mol-1,蠕变变形受位错的粘滞性滑移过程控制;高应力范围内蠕变应力因子n为5~6,蠕变激活能Qapp≈170 k J·mol-1,遵循典型的5次幂律蠕变规律,蠕变变形受位错攀移过程控制。在723 K时,高应力范围内发生幂律失效。N36锆合金包壳管表现为典型的Class A型合金蠕变特征,表现出与Zircaloy合金不同的蠕变规律。
[Abstract]:The tensile creep behavior of N36 zirconium alloy cladding tube was studied at a temperature of 593 ~ 723K and a stress of 60 ~ 160 MPa. The results show that the creep stress factor n is about 3 in the low stress range of 593 ~ 673 K under different creep deformation mechanism of N36 zirconium alloy pipe. The creep apparent activation energy Qapp 鈮,
本文编号:2260651
[Abstract]:The tensile creep behavior of N36 zirconium alloy cladding tube was studied at a temperature of 593 ~ 723K and a stress of 60 ~ 160 MPa. The results show that the creep stress factor n is about 3 in the low stress range of 593 ~ 673 K under different creep deformation mechanism of N36 zirconium alloy pipe. The creep apparent activation energy Qapp 鈮,
本文编号:2260651
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