Quenching Simulation of Aluminum Alloys Including Mechanical Properties of the Undercooled States
Quenching Simulation of Aluminum Alloys Including Mechanical Properties of the Undercooled States
复制标题
铝合金淬火模拟，包括过冷状态的力学性能
DOI：
10.1520/mpc104632
复制
发表时间：
2012
影响因子：
1.1
通讯作者：
O. Kessler
中科院分区：
文献类型：
--
作者：
M. Reich;O. Kessler
时效硬化是强化铝合金最重要的热处理。它由固溶退火、淬火和时效组成。在淬火过程中，形成过饱和固溶体，这是随后强化颗粒沉淀所必需的。淬火过程中，部件中会出现热梯度，从而产生残余应力和变形。有限元方法 (FEM) 已成为了解热处理过程中热应力和变形的复杂机制的非常有效的工具。可靠的数值模拟需要准确的材料特性和现实的本构定律。对于淬火铝合金，材料性能是指过冷状态的行为，具体取决于温度和微观结构以及冷却速率。这些非平衡微观结构的机械性能尚不清楚。因此，在淬火变形膨胀仪中对过冷铝合金 EN-AW A6082 (AlSi1MgMn) 进行压缩试验和拉伸/压缩试验。样品已在膨胀计中以不同的冷却速率固溶退火和淬火至不同的温度。淬火后立即进行淬火温度变形试验。结果已在 FEM 软件 SYSWELD 的材料模型中得到应用。对具有不同腿的挤压 6082 L 型材进行温水淬火模拟，以了解和预测残余应力和变形的产生。使用所提出的模型可以模拟这种复杂的几何形状和不均匀的传热。淬火6082 L型材的实验结果验证了上述模拟。
Age hardening is the most important heat treatment to strengthen aluminum alloys. It consists of solution annealing, quenching, and aging. During quenching, a supersaturated solid solution is formed which is necessary for the following precipitation of strengthening particles. During quenching, thermal gradients occur in components, which can generate residual stresses and distortion. The finite element method (FEM) has become a very efficient tool in understanding the complex mechanisms of thermal stresses and distortions during heat treatment. Reliable numerical simulations require accurate material properties and realistic constitutive laws. In the case of quenched aluminum alloys, material properties mean the behavior of the undercooled states depending on temperature and microstructure respectively cooling rate. The mechanical properties of these non-equilibrium microstructures are not available yet. Therefore, compression tests and also tension/compression tests of undercooled aluminum alloy EN-AW A6082 (AlSi1MgMn) were performed in a quenching and deformation dilatometer. Samples have been solution annealed and quenched in the dilatometer to varying temperatures with varying cooling rates. Immediately after quenching, deformation tests on quenching temperature have been performed. The results were implemented in the material model of the FEM-Software SYSWELD. Quenching in warm water of an extruded 6082 L-profile with different legs was simulated to understand and predict residual stress and distortion generation. Using the presented model enables to simulate this complex geometry and inhomogeneous heat transfer. The experimental results of quenched 6082 L-profiles verified the above simulations.
铝合金与钢热处理模拟的异同
影响因子：
1.1
作者：
Kessler;Reich M.
通讯作者：
Reich M.