Evolution of microstructure and mechanical properties in multi-layer 316L-TiC composite fabricated by selective laser melting additive manufacturing  

选择性激光熔化增材法制备多层316L-TiC复合涂层的微观结构和力学性能

作　　者：Sasan YAZDANI Suleyman TEKELI Hossein RABIEIFAR Ufuk TASCI Elina AKBARZADEH 

机构地区：[1]Faculty of Materials Engineering,Sahand University of Technology,Tabriz 51335-1996,Iran [2]Department of Metallurgy and Materials Engineering,Faculty of Technology,Gazi University,06560 Ankara,Turkey [3]MAPNA Turbine Blade Eng.&Mfg.Co.PARTO,Fardis 3167643597,Karaj,Iran [4]Department of Technical Sciences Vocational School,Gazi University,06374 Ankara,Turkey

出　　处：《Journal of Central South University》2024年第9期2973-2991,共19页中南大学学报（英文版）

摘　　要：In this study,the microstructure and mechanical properties of a multi-layered 316L-TiC composite material produced by selective laser melting(SLM)additive manufacturing process are investigated.Three different layers,consisting of 316L stainless steel,316L-5 wt%TiC and 316L-10 wt%TiC,were additively manufactured.The microstructure of these layers was characterized by optical microscopy(OM)and scanning electron microscopy(SEM).X-ray diffraction(XRD)was used for phase analysis,and the mechanical properties were evaluated by tensile and nanoindentation tests.The microstructural observations show epitaxial grain growth within the composite layers,with the elongated grains growing predominantly in the build direction.XRD analysis confirms the successful incorporation of the TiC particles into the 316L matrix,with no unwanted phases present.Nanoindentation results indicate a significant increase in the hardness and modulus of elasticity of the composite layers compared to pure 316L stainless steel,suggesting improved mechanical properties.Tensile tests show remarkable strength values for the 316L-TiC composite samples,which can be attributed to the embedded TiC particles.These results highlight the potential of SLM in the production of multi-layer metal-ceramic composites for applications that require high strength and ductility of metallic components in addition to the exceptional hardness of the ceramic particles.本文研究了选择性激光熔化增材法制备的316L-TiC复合材料的微观结构和力学性能。选择性激光熔融增材法(SLM)制备的三层复合涂层包括316L不锈钢、316L-5 wt%TiC和316L-10 wt%TiC。通过光学显微镜(OM)和扫描电子显微镜(SEM)对复合涂层的微观结构进行了表征,采用X射线衍射(XRD)进行相分析,并通过拉伸和纳米压痕试验评价其力学性能。微观结构观察表明,外延晶粒在复合层内生长,而细长的晶粒主要沿构建方向生长。XRD分析证实了TiC粒子成功地掺入到316L基质中,没有其他的相存在。纳米压痕结果表明,与316L不锈钢相比,复合材料层的硬度和弹性模量显著增加,表明其力学性能有改善。拉伸试验表明,316 L-TiC复合材料样品的强度值显著提高,这归因于嵌入的TiC颗粒。这些结果表明,SLM除了制备具有特殊硬度的陶瓷外,还在高强度和延展性的多层金属-陶瓷复合材料方面存在潜力。

关 键 词：multilayer metal-ceramic composites selective laser melting functionally graded materials 316 L stainless steel TIC 

分 类 号：TB333[一般工业技术—材料科学与工程] TG665[金属学及工艺—金属切削加工及机床]