This paper is focussed on the mechanical and formability characterisation of wire-arc additive manufactured (WAAM) AISI 316-L stainless-steel tubes. The methodology to be presented involved carrying out tension and ring hoop tension tests on specimens extracted from the tube longitudinal, transverse and inclined directions. The force evolutions, acquired from the load cells, and the strain measurements, retrieved from digital image correlation and from thickness measurements along the cracks, allowed obtaining the stress-strain curves, the strain paths and the onset of failure by fracture for the three different tube directions. Special attention was paid to the ring hoop test, which was revisited to determine the appropriateness of using ring specimens with one or two dumbbell geometries. The originality of using the ring hoop tension test in WAAM tubes with strong anisotropic behaviour allowed obtaining strain loading paths that range from plane strain to pure shear deformation conditions. Resort to commercial AISI 316-L stainless-steel tubes during the presentation is included for reference purposes.

本文重点介绍电弧增材制造 (WAAM) AISI 316-L 不锈钢管的机械和成形性表征。将提出的方法包括对从管子纵向、横向和倾斜方向提取的试样进行拉伸和环箍拉伸试验。从称重传感器获得的力演变和从数字图像相关性和沿裂纹厚度测量中检索的应变测量值，允许获得三种不同的应力-应变曲线、应变路径和断裂失效的开始。管方向。特别注意环箍测试，该测试被重新审视以确定使用具有一或两个哑铃几何形状的环试样的适当性。在具有强各向异性行为的 WAAM 管中使用环箍拉伸试验的独创性允许获得从平面应变到纯剪切变形条件的应变加载路径。介绍期间使用商用 AISI 316-L 不锈钢管以供参考。