Hydride orientation and tensile properties of Zr-2.5 wt% Nb pressure tubing hydrided while internally pressurized
Hydride orientation and tensile properties of Zr-2.5 wt% Nb pressure tubing hydrided while internally pressurized
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DOI：
10.1179/cmq.1972.11.1.129
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发表时间：
1972
影响因子：
0.9
通讯作者：
E. Price
中科院分区：
文献类型：
--
作者：
E. Price
本文研究了Zr-2.5wt%Nb合金管材在内压腐蚀过程中析出相的取向及其对拉伸性能的影响。结果发现，随着应力的增加，在弯曲过程中逐渐呈现出一个特征的径向取向几乎垂直于环向应力。氢化物的径向取向受原始β晶粒尺寸、残余淬火应力、冷加工应变和压力管淬火时施加的应力的影响。需要超过20，000 psi的环向应力来产生完全径向取向的套管。使用减截面环技术对套管进行横向拉伸试验。这些测试表明，对于具有径向取向的α的材料，低温下的延展性低，转变温度在60°-100 ° C范围内。在明显更高的温度下观察到低的拉伸延展性。
AbstractAn investigation was carried out to determine the orientation and the effect on tensile properties of hydrides precipitated in heat-treated Zr-2.5 wt% Nb tubing during the corrosion hydriding of internally pressurized samples. It was found that as the stress during hydriding was increased the hydrides gradually assumed a characteristic radial orientation nearly perpendicular to the hoop stress. The observed radial hydride orientation was influenced by prior β grain size, residual quenching stresses, cold-work strains and stresses applied while the pressure tube was being hydrided. Hoop stresses in excess of 20,000 psi were required to produce complete radial orientation of the hydrides.Transverse tensile tests on the hydrided tubes were conducted using a reduced section ring technique. These tests revealed a low ductility at low temperatures with a transition in the range 60°–100°C for material with radially oriented hydrides. Low tensile ductility was observed at significantly higher temperatures...