Abstract The stress-strain behavior of the aluminum alloy AA3103 subjected to single and double strain-path changes (SPCs) is studied experimentally. The experimental program includes compression-tension, tension-tension, rolling-tension and tension-rolling-tension tests. The considered AA3103 plate exhibits plastic anisotropy, a strong Bauschinger effect with hardening stagnation after strain reversal, cross-hardening and permanent softening after orthogonal SPCs in the tension-tension tests. However, when instead the orthogonal SPCs are obtained by rolling-tension tests, cross-softening is observed. The same behavior is seen in more complex tension-rolling-tension tests. Three state-of-the-art advanced plasticity models are used in an attempt to model the experimentally observed behavior. These models all account for plastic anisotropy and transient effects after SPCs, using a microstructure deviator tensor to describe a fading memory of the deformation history. While the models successfully describe the behavior after strain reversals, they fail to represent the behavior after orthogonal SPCs. It is concluded that the Schmitt angle, on which the current models depend, is not sufficient for a fundamental description of SPCs for the considered AA3103 alloy.

中文翻译：

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AA3103铝合金复杂单双应变路径变化的实验表征和建模

摘要 实验研究了AA3103铝合金在单、双应变路径变化(SPCs)作用下的应力-应变行为。实验程序包括压缩-拉伸、拉伸-拉伸、轧制-拉伸和拉伸-轧制-拉伸试验。所考虑的 AA3103 板表现出塑性各向异性、强烈的包辛格效应，应变反转后硬化停滞，在拉伸 - 拉伸试验中正交 SPC 后交叉硬化和永久软化。然而，当通过滚动拉伸试验获得正交 SPC 时，观察到交叉软化。在更复杂的张力-滚动-张力测试中可以看到相同的行为。三个最先进的高级可塑性模型用于模拟实验观察到的行为。这些模型都考虑了 SPC 后的塑性各向异性和瞬态效应，使用微结构偏差张量来描述变形历史的衰减记忆。虽然模型成功地描述了应变反转后的行为，但它们无法表示正交 SPC 后的行为。得出的结论是，当前模型所依赖的施密特角不足以对所考虑的 AA3103 合金的 SPC 进行基本描述。