郑可,李传维,顾剑锋

• 1:上海交通大学上海市激光制造与材料改性重点实验室
• 2:上海交通大学材料科学与工程学院材料改性与数值模拟研究所

摘要(Abstract)：

采用微纳米压痕实验研究了固溶态和时效态7075铝合金的力学性能和压痕蠕变行为，获得了其力学本构方程、应力-应变曲线和蠕变应力指数。结果表明：两种状态铝合金的硬度和弹性模量均随着载荷的增大而减小，并在压痕深度小于1μm时表现出明显的尺寸效应。固溶态和时效态铝合金的屈服强度分别为446 MPa和497 MPa,抗拉强度分别为594 MPa和691 MPa。两种状态合金的最大蠕变深度和蠕变应力指数变化趋势相似，均随载荷和加载速率的增大而增大。

关键词(KeyWords)： 7075铝合金;微纳米压痕试验;尺寸效应;本构关系;压痕蠕变

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(52171042)

作者(Author): 郑可,李传维,顾剑锋

DOI: 10.13289/j.issn.1009-6264.2022-0307

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