Multi-material laser-based powder bed fusion (PBF-LB) allows manufacturing of parts with 3-dimensional gradient and additional functionality in a single step. This research focuses on the combination of thermally-cond...Multi-material laser-based powder bed fusion (PBF-LB) allows manufacturing of parts with 3-dimensional gradient and additional functionality in a single step. This research focuses on the combination of thermally-conductive CuCr1Zr with hard M300 tool steel.Two interface configurations of M300 on CuCr1Zr and CuCr1Zr on M300 were investigated. Ultra-fine grains form at the interface due to the low mutual solubility of Cu and steel. The material mixing zone size is dependent on the configurations and tunable in the range of0.1–0.3 mm by introducing a separate set of parameters for the interface layers. Microcracks and pores mainly occur in the transition zone.Regardless of these defects, the thermal diffusivity of bimetallic parts with 50vol% of CuCr1Zr significantly increases by 70%–150%compared to pure M300. The thermal diffusivity of CuCr1Zr and the hardness of M300 steel can be enhanced simultaneously by applying the aging heat treatment.展开更多
INTRODUCTION Additive Manufacturing(AM)is often hailed as the manufacturing technology of the future.This claim is fueled by the short design to product cycles,the potential to produce parts with near zero material wa...INTRODUCTION Additive Manufacturing(AM)is often hailed as the manufacturing technology of the future.This claim is fueled by the short design to product cycles,the potential to produce parts with near zero material waste and a seemingly unlimited design freedom.For metal working,the design freedom opened new possibilities no one could imagine a mere three decades ago.Indeed,light weighting and stress optimization can be driven to an extreme,and complex parts with internal channels and/or scaffolds have become common place.For sectors such as biomedical engineering and aerospace,this allows solving problems which could never be tackled with traditional manufacturing and has led to widespread adoption of AM technology.展开更多
基金supported by VTT Technical Research Centre of Finland,Aalto University,Aerosint SA,and partially from European Union Horizon 2020 (No.768775)。
文摘Multi-material laser-based powder bed fusion (PBF-LB) allows manufacturing of parts with 3-dimensional gradient and additional functionality in a single step. This research focuses on the combination of thermally-conductive CuCr1Zr with hard M300 tool steel.Two interface configurations of M300 on CuCr1Zr and CuCr1Zr on M300 were investigated. Ultra-fine grains form at the interface due to the low mutual solubility of Cu and steel. The material mixing zone size is dependent on the configurations and tunable in the range of0.1–0.3 mm by introducing a separate set of parameters for the interface layers. Microcracks and pores mainly occur in the transition zone.Regardless of these defects, the thermal diffusivity of bimetallic parts with 50vol% of CuCr1Zr significantly increases by 70%–150%compared to pure M300. The thermal diffusivity of CuCr1Zr and the hardness of M300 steel can be enhanced simultaneously by applying the aging heat treatment.
文摘INTRODUCTION Additive Manufacturing(AM)is often hailed as the manufacturing technology of the future.This claim is fueled by the short design to product cycles,the potential to produce parts with near zero material waste and a seemingly unlimited design freedom.For metal working,the design freedom opened new possibilities no one could imagine a mere three decades ago.Indeed,light weighting and stress optimization can be driven to an extreme,and complex parts with internal channels and/or scaffolds have become common place.For sectors such as biomedical engineering and aerospace,this allows solving problems which could never be tackled with traditional manufacturing and has led to widespread adoption of AM technology.
