Mini specimens of 5052 alloy have been used to study the mechanical behaviour for cladding materials of research reactor. The problem that arises in the manufacture of the mini specimens is the deformation effect after shear cutting process. The objective of this research is to obtain characteristics of mini specimens of 5052 alloy, i.e. microstructure, hardness and tensile strength. The results have showen that microstructureof fresh 5052 alloy is not homogeneous, but that of as-rolled 5052 alloy is non-homogeneous for elongated flat along the roll direction. In the 250°C heat treatment, the grain structure of as-rolled 5052 alloys is increasingly homogeneous with slight grain size changes as the heating time increases. The hardness of 5052 alloy as-rolled after heat treatment ranges from 39.67 - 40.55 VHN. The hardness of as-rolled 5052 alloy is higher than that of fresh 5052 alloy without and post heat treatment. Tensile strength of as-rolled 5052 alloy after heat treatment is relatively the same, i.e. 159.50 – 160.27 MPa with a strain of 31.67 – 34.58%. Tensile strength of 5052 alloy after mechanical treatment has higher tensile strength than fresh and as-rolled 5052 alloys. The mechanical treatment of as-rolled 5052 alloy could eliminates the shear cutting effect on the surface of mini specimens.

中文翻译：

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研究堆燃料包层微型标本的显微组织表征和力学性能

已使用5052合金的微型标本来研究研究堆覆层材料​​的力学性能。在微型样品的制造中出现的问题是剪切切割过程之后的变形效果。这项研究的目的是获得5052合金微型试样的特征，即组织，硬度和拉伸强度。结果表明，对于沿轧制方向拉长的扁平材，新鲜5052合金的显微组织不是均匀的，但轧制5052合金的显微组织是不均匀的。在250°C的热处理中，轧制的5052合金的晶粒结构越来越均匀，随着加热时间的增加，晶粒尺寸也会发生微小变化。热处理后轧制的5052合金的硬度范围为39.67-40.55 VHN。未经过热处理和后热处理的5052合金的硬度要高于新鲜的5052合金。热处理后的5052合金轧制后的拉伸强度相对相同，即159.50 – 160.27 MPa，应变为31.67 – 34.58％。经过机械处理的5052合金的拉伸强度比新鲜和轧制的5052合金具有更高的拉伸强度。轧制后的5052合金的机械处理可以消除微型试样表面的剪切效应。