基于激光选区融化技术的不同空间孔隙结构多孔Ti6Al4V合金的力学性能研究

Study on Mechanical Properties of Porous Ti6Al4V Alloy with Different Spatial Pore Structure by Laser Selective Melting Technology

以Ti6Al4V球形粉末为原料,利用激光选区熔化技术(SLM)精确化制备了Ti6Al4V合金样品试件。采用扫描电镜观察了3种不同空间孔隙结构(正六面体结构、G7结构、复合结构)的表观形貌,采用万能压缩试验机测试样品试件的力学性能,探究了激光选区融化技术对不同空间孔隙结构多孔Ti6Al4V合金的室温力学性能。结果表明:SLM成形Ti6Al4V合金室温的压缩弹性模量分别为1460、1530、1300 MPa,抗压强度分别为111、1460、184 MPa。复合结构的试件综合力学性能更能符合种植体-骨界面的结合和生长,为探究种植体新的多孔结构提供理论依据。

Using Ti6Al4V spherical powder as raw material,the Ti6Al4V alloy sample specimens were precisely prepared by laser selective melting technology(SLM).The apparent morphology of three different spatial pore structures(regular hexahedral structure,G7 structure,composite structure)was observed by scanning electron microscope.Use universal compression testing machine to test the mechanical properties of the sample specimens.The research on the room temperature mechanical properties of porous Ti6Al4V alloys with different spatial pore structures by laser selective melting technology was explored.The results show that the compressive elastic modulus of Ti6Al4V alloy formed by SLM at room temperature is 1460,1530 and 1300 MPa,and the compressive strength is 111,1460,and 184 MPa.The comprehensive mechanical properties of the sample with composite structure are more in line with the combination and growth of the implant-bone interface,which can provide a theory for exploring the new porous structure of the implant.