Microstructure and crystallographic texture of direct energy deposition printed 316L stainless steel

IF 1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-10-30 DOI:10.15251/djnb.2023.184.1293

H. R. Zhi, H. T. Zhao, Y. F. Zhang, B. Dampilon

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Abstract

The microstructural features and crystallographic texture of 316L stainless steel prepared by direct energy deposition (DED) are studied. The grain size, morphology, grain boundary, misorientation distribution along different direction and mechanical properties are characterized via detailed electron backscatter diffraction (EBSD) analysis and Vickers microhardness tester. The DED-built 316L stainless steel exhibits equiaxed cellular and elongated morphology. Only a few number of dislocations are accumulated and entangled near small grain boundary. The sample contains mainly large angle grain boundary. 316L stainless steel powder is melted to form a deep and shallow shape measured from the top view. The average grain size is 38.32 µm and 29.79 µm for the top and side view, respectively. Two strong textural components of {001}<100> cube texture and {110}<001> Goss texture are formed perpendicular and parallel to the scanning direction, respectively. The microhardness of DED-built 316L stainless steel achieves a higher average value of 261.74 HV.

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直接能量沉积印刷316L不锈钢的微观结构和晶体织构

研究了直接能量沉积法(DED)制备的316L不锈钢的显微组织特征和晶体织构。通过电子背散射衍射(EBSD)分析和维氏显微硬度计对合金的晶粒尺寸、形貌、晶界、取向偏差分布及力学性能进行了表征。d建造的316L不锈钢具有等轴细胞和拉长的形态。只有少数位错在小晶界附近积累和纠缠。样品主要含有大角度晶界。316L不锈钢粉末熔化，形成从顶视图测量的深和浅形状。顶视图和侧视图的平均晶粒尺寸分别为38.32µm和29.79µm。{001}<100>立方体纹理和{110}<001>高斯纹理分别与扫描方向垂直和平行形成。d型316L不锈钢的显微硬度达到较高的平均值261.74 HV。

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