As built and post heat treatment residual stresses in 316L stainless steel additively manufactured benchmark arches

The data presented is the residual stress in three orthogonal directions determined by neutron diffraction (SALSA at ILL) and synchrotron X-ray diffraction (P07 and P61A at Desy operated by Hereon). The data is for residual stress in a benchmark 316L stainless steel arches manufactured by laser powder bed fusion using MetalFAB1 and EOS M290 additive manufacturing machines. These arches are square topped with dimensions of nominally 20 mm in both the x and y direction (in plane). The overhang which creates the arch shape runs parallel to the y direction. The height of the arch is nominally 10 mm with the ligament above the over hang being of 2 mm nominal thickness. Data for part in both an as built and after a 700 °C 2 hour heat treatment are presented. The measurement line runs from the centre of the top surface (defined at the origin) down into the arch (defined as positive z direction). The stress-free reference used was a reference comb cut from an identically made arches. For heat treated samples, heat treated combs were used. Different gauge volume sizes and shapes were defined at each institution, all measurement locations indicate the centre of the gauge volume during each measurement. gauge volumes were: P07 200 x 200 µm2, ~1.9 mm, P61A 150 × 150 µm2 ~2.9 mm, ID15A 200 x 50 µm2 ~1.7 mm, SALSA 0.6 x 0.6 x2 mm3.本次提供的数据为通过中子衍射（法国劳厄-朗之万研究所（ILL）的SALSA装置）与同步辐射X射线衍射（德国亥姆霍兹材料与海洋研究中心Hereon运营的德国电子同步加速器研究所Desy的P07、P61A束线）测得的三个正交方向残余应力。数据对象为采用激光粉末床熔融工艺，通过MetalFAB1与EOS M290增材制造设备制备的基准316L不锈钢拱结构。该拱结构为平顶造型，x、y平面内的标称尺寸均为20 mm；形成拱形状的悬垂结构沿y方向延伸，拱高标称值为10 mm，悬垂上方的韧带标称厚度为2 mm。本次同时提供了该构件原始制备态（as built）以及经700℃、2小时热处理后的残余应力数据。测量线从顶面中心（定义为坐标原点）沿z轴正方向深入拱结构内部。本次采用的无应力参考样品为从同批次制备的拱结构上切割得到的参考梳状试样；对于经热处理的试样，则使用经相同工艺热处理的梳状参考样品。不同测试机构采用了不同尺寸与形状的测量体积（gauge volume），所有测量位置均对应单次测量时测量体积的中心。各装置的测量体积参数如下：P07束线：200 × 200 µm²，长度约1.9 mm；P61A束线：150 × 150 µm²，长度约2.9 mm；ID15A束线：200 × 50 µm²，长度约1.7 mm；SALSA装置：0.6 × 0.6 × 2 mm³。