An innovative powder-free experimental method through laser remelting was conducted on bare NiTiHf ingots to validate the parameter impacts of the LPBF process. The result is the processability window with no cracking likelihood under diverse LPBF conditions, including laser power and scan...
墨西哥国家增材和数字制造实验室(MADiT)、墨西哥国立自治大学及墨西哥蒙特雷理工大学的科研人员报道了工艺参数对金属LPBF工艺制造零件的粗糙度和拉伸性能的影响的研究。相关研究成果以“Effect of process parameters on the roughness and tensile behavior of parts manufactured by the metals LPBF process”为题发表在《E...
墨西哥国家增材和数字制造实验室(MADiT)、墨西哥国立自治大学及墨西哥蒙特雷理工大学的科研人员报道了工艺参数对金属LPBF工艺制造零件的粗糙度和拉伸性能的影响的研究。相关研究成果以“Effect of process parameters on the roughness and tensile behavior...
The LPBF process is based on an iterative procedure to manufacture parts in layers inside a powder bed. Once a layer of powder has been spread by the coater on a plane surface, one or several laser beams are guided by laser scanners over the areas which are to become molten and form a ...
Sample IDStage 1: PBF-LB processparametersStage 2: Ageing parameters (Box-Behnken (BB) DOE) Laser Power (W)Scan Speed (mm/s)a Hatch Spacing (μm)+AT (°C)+ADT (minutes)(J/mm3) S1180900635006080 S21809004250030120 S31809004240060120 ...
图2定制设备Quad-laser in situ and operando process replicator(Quad-ISOPR)的示意图。 视频1 (见文末)原位x射线成像实验中Quad-ISOPR模拟LPBF的过程。 原位实验在欧洲同步辐射光源实验室(ESRF)的高速成像光束线ID19上进行。该光束线使用两个U32摆动器产生多色硬X射线束,平均能量约为30 keV。当入射光束通过样...
LPBF原位x射线成像实验设计以及图像处理，本实验中使用的设备是由UCL团队研发定制的LPBF激光3D打印设备，称为Quad-laser in situ and operando process replicator（Quad-ISOPR）。如图2所示，该设备由四个RenAM 500Q（英国Renishaw公司）激光扫描头、高速摄像机以及一个充满氩气保护气体的工作室组成。其激光功率最高...
Understanding parts thermal history during the laser powder bed fusion (LPBF) process is crucial since it can help avoiding manufacturing defects, identifying hotspots, saving time and cost associated with experimental analysis. For the case of LPBF, however, numerical methods are computationally ...
LPBF原位x射线成像实验设计以及图像处理,本实验中使用的设备是由UCL团队研发定制的LPBF激光3D打印设备,称为Quad-laser in situ and operando process replicator(Quad-ISOPR)。如图2所示,该设备由四个RenAM 500Q(英国Renishaw公司)激光扫描头、高速摄像机以及一个充满氩气保护气体的工作室组成。其激光功率最高可达500...
Process atmosphereArgon, with maximum allowed oxygen content 1000 ppm 表2。原料粉末的标称化学成分。 在从组1和组2中选择的样品中进行电子背散射衍射。源自这两组的EBSD方位图如图2a所示。在这两张图中,都可以辨别出熔池和细长晶粒的典型外观。在较大的对应图中测量晶粒面积,从而可以比较晶粒尺寸分布,如图2b。