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一、引言利用应力松弛试验评定材料的蠕变性能,特别是在研究中子辐照条件下的材料蠕变性能,是一个非常简便的方法。我们以拉伸试样和小型弯曲梁式试样进行了试验。二、试验材料与试样试验材料成分及加工工艺见文献〔5〕。 1.拉伸试样将外径为91毫米,壁厚为4毫米的Zr—2.5Nb压力管切成180毫米的圆筒,然后沿轴向加工成图1形状,内外表面均未加工,标距内截面标称尺寸为2×4毫米,标距100毫米,用负荷为10公斤的维氏硬度计在
I. INTRODUCTION It is a very simple and convenient method to evaluate the creep property of materials by using stress relaxation test, especially when studying the creep property of materials under neutron irradiation. We tested with tensile specimens and small bending beam specimens. Second, the test material and sample test materials composition and processing technology in the literature [5]. 1. Tensile Specimen A Zr-2.5Nb pressure tube with an outer diameter of 91 mm and a wall thickness of 4 mm was cut into a cylinder of 180 mm and then machined into the shape of Figure 1 along the axial direction without any machining of the inner and outer surfaces Nominal size from the cross-section of 2 × 4 mm, 100 mm gauge, with a load of 10 kg Vickers hardness tester in