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首页> 外文期刊>Journal of Manufacturing Processes >Tension-compression asymmetry of additively manufactured Maraging steel
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Tension-compression asymmetry of additively manufactured Maraging steel

机译：增材制造马氏体时效钢的拉伸压缩不对称性

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Additive Manufacturing (AM) or "3D printing" refers to processes used to synthesize an engineering part, where successive layers of material are formed under computer control to create a three-dimensional object. AM methods allow for production of parts with complex geometries and exceptional properties, which is of particular interest of automotive, aerospace, marine, and defence industries. Most of the parts produced for these applications are non-critical, however applications involving large deformations, such as impact, are of serious interest to industry. Unlike most conventional materials, AM metals do not have the same compressive and tensile behavior. This paper presents a preliminary study of experimental results of the tensile and compressive behaviour of additively manufactured Maraging Steel (MS1) using Digital Image Correlation (DIC) technique. Compression and tension samples in the form of cubes and rods were prepared using Direct Metal Laser Sintering (DMLS) technique through an EOS M290 machine. Compression data was collected using a DIC system to investigate the anisotropy of the strain field in the material. Results showed some material anisotropy due to build direction and dramatic improvement in elongation to failure in compression. Finally, a tension-compression asymmetry analysis of the additively manufactured MS1 revealed that the extreme softening in tension is not a result of void nucleation/growth in the material, but rather geometric softening due to necking.
机译：增材制造（AM）或“ 3D打印”是指用于合成工程零件的过程，其中在计算机控制下形成连续的材料层以创建三维对象。 AM方法可以生产具有复杂几何形状和卓越性能的零件，这在汽车，航空航天，船舶和国防工业中尤为重要。为这些应用程序生产的大多数零件都是非关键的，但是涉及大变形（例如冲击）的应用程序在工业上引起了人们的极大兴趣。与大多数常规材料不同，AM金属不具有相同的压缩和拉伸行为。本文使用数字图像相关（DIC）技术对增材制造的马氏体时效钢（MS1）的拉伸和压缩行为的实验结果进行了初步研究。通过直接金属激光烧结（DMLS）技术通过EOS M290机器准备了立方体和棒状的压缩和拉伸样品。使用DIC系统收集压缩数据，以研究材料中应变场的各向异性。结果表明，由于构造方向和压缩破坏伸长率的显着提高，材料存在一些各向异性。最后，对加成制造的MS1的拉伸压缩不对称分析表明，拉伸的极端软化不是材料中空核/增长的结果，而是由于颈缩引起的几何软化。

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