The effect of SrO heterogeneous nucleation site particles on the formability, microstructure, and mechanical properties of additive manufactured 316 L (Fe-17%Cr-11%Ni-2%Mo) stainless steel samples produced by laser-based powder bed fusion has been investigated. The relative densities of the samples produced with SrO under medium and low energy density conditions were higher than those produced without SrO, although addition of SrO negatively affected the relative density under the high energy density condition. SrO addition showed significant grain refinement (about 15%) on the 316 L stainless steel alloy during laser-based powder bed fusion. Although it was found that SrO had a negative effect on the mechanical properties under the high energy density condition, significant improvements of the microstructure and mechanical properties was achieved by addition of SrO under the low energy density condition with high scanning velocity. It can be concluded that addition of heterogeneous nucleation site particles is a potential way to control the microstructure and mechanical properties of samples made by laser-based powder bed fusion.

SrO 异相形核位点颗粒对激光基粉末床熔合生产的增材制造 316 L (Fe-17%Cr-11%Ni-2%Mo) 不锈钢样品的成形性、显微组织和力学性能的影响进行了调查。在中等和低能量密度条件下用 SrO 生产的样品的相对密度高于没有用 SrO 生产的样品，尽管添加 SrO 会对高能量密度条件下的相对密度产生负面影响。在基于激光的粉末床熔合过程中，添加 SrO 对 316 L 不锈钢合金显示出显着的晶粒细化（约 15%）。虽然发现 SrO 在高能量密度条件下对力学性能有负面影响，通过在低能量密度条件下和高扫描速度下添加 SrO，显着改善了微观结构和机械性能。可以得出结论，添加异质成核位点颗粒是控制基于激光的粉末床熔融制备的样品的微观结构和机械性能的潜在方法。