Structural performance of additive manufactured metallic material and cross-sections
Structural performance of additive manufactured metallic material and cross-sections
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DOI：
10.1016/j.jcsr.2017.05.002
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发表时间：
2017-09-01
影响因子：
4.1
通讯作者：
Gardner, Leroy
中科院分区：
文献类型：
--
作者：
Buchanan, Craig;Matilainen, Ville-Pekka;Gardner, Leroy
增材制造，其中一个常见的例子是3D打印，近年来已经变得越来越普遍，现在可以以这种方式形成金属结构元件。然而，有有限的可用的实验数据的材料行为的粉末床融合（PBF）添加剂制造的金属结构元件和现有的数据在横截面水平;这是在本文件中通过一系列的测试添加剂制造的不锈钢材料和横截面。拉伸和压缩试样测试被用来评估各向异性，对称的应力-应变行为和建设方向对材料性能的影响。屈服强度和极限拉伸强度一般随着建造角度的增加而降低，而在某些建造方向上观察到延展性降低，并且杨氏模量通常对建造角度不敏感。通过一系列方形空心截面（SHS）短柱试验研究了PBF增材制造截面的结构性能，并将结果与常规生产的不锈钢SHS进行了比较。生成的测试结果已被用于评估现有的设计指南的适用性，为传统生产的部分添加剂制造的部分。
Additive manufacturing, a common example of which is 3D printing, has become more prevalent in recent years with it now being possible to form metallic structural elements in this way. There are, however, limited available experimental data on the material behaviour of powder bed fusion (PBF) additive manufactured metallic structural elements and no existing data at the cross-section level; this is addressed in the present paper through a series of tests on additive manufactured stainless steel material and cross-sections. Tensile and compressive coupon tests were used to assess anisotropy, symmetry of stress-strain behaviour and the influence of building direction on the material properties. The yield and ultimate tensile strengths were seen to generally decrease in magnitude with increasing build angle, while a reduction in ductility was observed in some building orientations, and the Young's moduli were typically insensitive to the build angle. The structural behaviour of PBF additive manufactured cross-sections was investigated through a series of square hollow section (SHS) stub column tests, and the results compared with conventionally produced stainless steel SHS. The generated test results have been used to evaluate the applicability of existing design guidance for conventionally produced sections to additive manufactured sections.