压水堆核燃料包壳材料锆—4合金管,在高温、高压水和蒸汽中,会受到各种腐蚀,特别是大量吸氢问题,对管子的使用寿命极其有害。锆合金由于吸氢而生成的氢化物,在管子中出现不同的排列。据国外报道,如果氢化物在析出时,其排列方向垂直于抗张试样的轴, Zirconium-4 alloy pipes for PWR nuclear fuel cladding materials are subject to various types of corrosion, especially large amounts of hydrogen uptake, in high temperature, high pressure water and steam and are extremely detrimental to the service life of the pipe. Hydrides of zirconium alloys due to hydrogen absorption appear differently in the tube. According to foreign reports, if the precipitation of hydride, its orientation perpendicular to the tensile test specimen axis,