期刊
MATERIALS TRANSACTIONS
卷 58, 期 5, 页码 799-805出版社
JAPAN INST METALS
DOI: 10.2320/matertrans.L-M2017809
关键词
additive manufacturing (AM); commercial-purity aluminum; microstructure; thermal property; mechanical property
Optimal laser scanning parameters to densify commercial-purity aluminum, fabricated using selective laser melting (SLM), were studied using an SLM machine equipped with a 400 W Yb fiber laser. The SLM samples with a relative density of 99.7% were obtained. The microstructures and the thermal and mechanical properties of the dense SLM samples fabricated using the optimal laser scanning parameters were investigated. The as-fabricated SLM samples had granular microstructures of aluminum, silicon, and/or iron oxides dispersed finely (0.3 mu m) due to the rapid solidification by laser irradiation. The mechanical properties were thus confirmed to be excellent (ultimate tensile strength: 110 MPa, proof stress: 90 MPa, breaking elongation: 30%). The thermal conductivity of the SLM sample was approximately 200 W/m.K, which was slightly inferior to that of the wrought commercial-purity aluminum (230 W/m.K). The effect of annealing on the properties of the SLM samples were also investigated. The thermal conductivity of the SLM sample annealed at 450 degrees C for 10 minutes increased to the same value as that of the wrought commercial-purity aluminum, although both the proof stress and breaking elongation were slightly decreased.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据