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首页> 外文期刊>Fatigue & Fracture of Engineering Materials & Structures >Fatigue behaviour of additive manufactured materials: An overview of some recent experimental studies on Ti-6A1-4V considering various processing and loading direction effects
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Fatigue behaviour of additive manufactured materials: An overview of some recent experimental studies on Ti-6A1-4V considering various processing and loading direction effects

机译：增材制造材料的疲劳行为：考虑到各种加工和载荷方向影响，最近对Ti-6A1-4V进行的一些实验研究概述

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摘要

Although additive manufacturing (AM) has gained significant attention due to the advantages it offers and is currently a focus of much research, design of critical load carrying components utilizing such processes is still at its infancy. This is due to the fact that most of the load carrying components made by AM processes are subjected to cyclic loads, and fatigue behaviour of AM metals is far less understood as compared with those made by conventional methods, such as wrought and cast metals. To better understand the fatigue behaviour of AM metals, a wide range of issues that affect the behaviour in a synergistic manner must be considered. These include the effects of defects, residual stresses, surface finish, geometry and size, layer orientation, and heat treatment. Additionally, due to the multiaxial nature of the loading and/or complex geometries typically manufactured by AM processes, the stress state is often multiaxial including both normal and shear stresses. In this paper, the aforementioned effects influencing the fatigue resistance of AM parts, including torsion and multiaxial fatigue behaviour, are briefly discussed using some recently generated experimental data on Ti-6Al-4V by the authors.
机译：尽管增材制造（AM）由于其优势而备受关注，并且目前是许多研究的重点，但利用此类工艺设计关键的承载部件仍处于起步阶段。这是由于以下事实：AM工艺制造的大多数承载部件都承受周期性载荷，与诸如锻造和铸造金属等传统方法制造的AM金属相比，AM金属的疲劳行为远未得到充分理解。为了更好地理解AM金属的疲劳行为，必须考虑各种以协同方式影响行为的问题。这些包括缺陷，残余应力，表面光洁度，几何形状和尺寸，层取向和热处理的影响。另外，由于载荷的多轴性质和/或通常通过AM工艺制造的复杂几何形状，应力状态通常是多轴的，包括法向应力和剪切应力。在本文中，作者使用一些最近生成的关于Ti-6Al-4V的实验数据，简要讨论了上述影响AM零件抗疲劳性的影响，包括扭转和多轴疲劳行为。

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