Abstract Cold working layers during additive manufacturing improves toughness by imparting a complex glocal integrity across pre-designed internally reinforced domains. Understanding mechanical behavior by mapping glocal integrity across these domains is difficult due to highly heterogeneous compositions formed by cyclic printing and peening. Ultrasound is proposed as a rapid, non-destructive tool to measure glocal integrity that is sensitive to heterogeneous organization of microstructure and residual stress. This work examines compressive behavior and measures glocal integrity with ultrasonic wave speed and attenuation perpendicular to the build direction after cyclically coupling laser engineered net shaping (LENS®) with laser peening on 420 stainless steel.

中文翻译：

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420不锈钢异步激光加工后的压缩行为

摘要 增材制造过程中的冷加工层通过在预先设计的内部增强域中赋予复杂的全局完整性来提高韧性。由于循环印刷和喷丸形成的高度异质成分，很难通过映射这些域的全局完整性来理解机械行为。超声波被提议作为一种快速、非破坏性的工具来测量对微观结构的异质组织和残余应力敏感的全局完整性。这项工作通过在 420 不锈钢上循环耦合激光工程净成形 (LENS®) 和激光喷丸后，用超声波速度和垂直于构建方向的衰减来检查压缩行为并测量全局局部完整性。