材料科学
因科镍合金
选择性激光熔化
高温合金
极限抗拉强度
微观结构
复合材料
压痕硬度
激光功率缩放
相对密度
沉淀硬化
再结晶(地质)
冶金
激光器
合金
物理
光学
作者
Wenquan Wang,Suyu Wang,Xinge Zhang,Fei Chen,Yuxin Xu,Yingtao Tian
标识
DOI:10.1016/j.jmapro.2021.02.004
摘要
The Inconel 718 superalloy (IN718) was fabricated by selective laser melting (SLM) successfully in this work. The optimization of process parameters and effects of three heat treatment processes on the microstructures and mechanical properties of samples were also systematically investigated. The relationship equation between relative density (RD) of SLMed samples and energy density (ED) coupled by laser parameters was determined. After the solution aging (SA) heat treatment, a large amount of needle-like δ phases precipitated and the precipitation of ultrafine spherical γ'/γ” strengthening phases as well as complete recrystallization appeared after homogenization + solution aging (HSA) heat treatment. The overall performances of SLMed IN718 samples were improved significantly using the HSA treatment, with the increase of tensile strength from 946 MPa to 1570 MPa.
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