Deformation and damage behavior of additively manufactured medium-manganese steels featuring an in situ established multiphase microstructure

具有原位建立的多相微观结构的增材制造中锰钢的变形和损伤行为

• 批准号: 461071457
• 负责人: Professor Dr.-Ing. Christian Haase
• 金额: --
• 依托单位: Institut für Werkstoffwissenschaften und -technologien
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/461071457?language=en
• 关键词: Deformation; damage; behavior; additively; manufactured

The general trend toward lightweight construction, emission reduction and resource efficiency, with the aim of minimizing global warming and conserving non-renewable energy sources, has become one of the most important tasks of our society. This trend not only requires the development of new high-strength and highly formable structural materials, but also the efficient use of remaining resources through the application of new developments in production technology.Steels containing manganese represent a promising class of high-strength and, at the same time, highly deformable materials with excellent energy absorption capacity. The unique combination of mechanical properties is achieved through the activation of secondary deformation mechanisms occurring in addition to pure dislocation sliding.The characteristics of additive manufacturing lead to advantages when respective techniques are used for processing steels containing manganese. Due to the high cooling rates, element segregation in the component can be significantly reduced. Due to the process inherent characteristic of adding material in layers, the cyclical heat input can also be used as in situ heat treatment and, thus, ultimately set the phase distribution in the material during the AM process.In the project microstructurally complex and industrially promising medium-manganese steels are to be manufactured using a shortened process route employing additive manufacturing. The multi-phase microstructure finally is established by means of the in situ heat treatment during the process. On the basis of the complementary expertise and equipment of the applying scientists and institutions, the aim of the project is to understand the fundamental material behavior during additive manufacturing and subsequent mechanical loading. Based on the basic understanding gained, the microstructure development in medium-manganese steels during additive manufacturing is to be influenced in such a way that the deformation and damage behavior can be tailored. Experimental investigations and computer-aided multiscale approaches for material characterization and simulation are used synergistically in the project.

轻量化建筑、减少排放和提高资源效率是大趋势，以最大限度地减少全球变暖和节约不可再生能源，已成为我们社会最重要的任务之一。这一趋势不仅需要开发新型高强度和高成形性结构材料，而且还需要通过应用新的生产技术来有效利用剩余资源。含锰钢代表了一类有前途的高强度和高强度结构材料。同时，高变形材料具有优异的能量吸收能力。除了纯位错滑动之外，还通过激活二次变形机制来实现机械性能的独特组合。当使用相应技术加工含锰钢时，增材制造的特性会带来优势。由于冷却速率高，可以显着减少部件中的元素偏析。由于分层添加材料的工艺固有特性，循环热输入也可以用作原位热处理，从而最终在增材制造过程中设定材料中的相分布。该项目微观结构复杂，具有工业前景中锰钢将采用增材制造的缩短工艺路线进行制造。过程中通过原位热处理最终形成多相显微组织。在应用科学家和机构互补的专业知识和设备的基础上，该项目的目的是了解增材制造和随后的机械加载过程中的基本材料行为。基于所获得的基本认识，增材制造过程中中锰钢微观结构的发展将受到影响，从而可以定制变形和损伤行为。该项目协同使用实验研究和计算机辅助多尺度方法进行材料表征和模拟。