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首页> 外文会议>International Conference on Mechanical Automation and Materials Engineering >Studies on the Residual Stress Distribution for 2A02 Aluminum Forgings
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Studies on the Residual Stress Distribution for 2A02 Aluminum Forgings

机译：2A02铝锻件的残余应力分布研究

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High strength aluminum alloys which improve mechanical properties through heat treatment have been widely used in aviation manufacturing. However, residual stresses that are harmful to the materials are brought in during the heat treatment process. By means of the analysis of micro-indentation method and ANSYS finite element method, the residual stress distribution in 2A02 aluminum forgings after water quenching were systematically investigated, mainly considering two factors of the symmetry of structure and the variation of surface constraint. The results of micro-indentation method show that the absolute value of the residual stress within the sample tends to decrease as the condition of constraint increase at the location of the same thickness; the absolute value of the surface residual stress also tends to decrease as the thickness of the sample increase with the same constraint conditions, the absolute value of the residual stress in the symmetrical sample is lower than that in the asymmetrical sample. The results of finite element simulation are as follows: for 2A02 aluminum alloy, the stress field distribution during the process of quenching is mainly influenced by the thickness of the samples. After the quenching process, the stress state at the components surface are controlled by compressive stress in the direction of both thickness and width, while the residual stress within the samples is dominated by tensile stress.
机译：通过热处理改善机械性能的高强度铝合金已广泛用于航空制造。然而，在热处理过程中引入了对材料有害的残余应力。通过微压痕法的分析的装置和ANSYS有限元方法，在水中淬火后2A02铝锻件残余应力分布系统的研究，主要是考虑到结构的对称性和表面约束的变化的两个因素。微压痕方法的结果表明，随着约束厚度的情况下，样品内残余应力的绝对值趋于减小;随着样品厚度随着相同的约束条件的厚度，表面残留应力的绝对值也倾向于降低，对称样品中的残余应力的绝对值低于非对称样品中的残余应力。有限元模拟的结果如下：对于2A02铝合金，淬火过程中的应力场分布主要受样品厚度的影响。在淬火过程之后，通过在厚度和宽度的方向上通过压缩应力来控制部件表面的应力状态，而样品内的残余应力由拉应力支配。

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