蒲林,任毅,陈伟,等.选区激光熔化成形的316L不锈钢点阵夹层结构的力学性能和能量吸收性能研究[J].精密成形工程,2023,15(5):71-78.
PU Lin,REN Yi,CHEN Wei,et al.Mechanical Properties and Energy Absorption Properties of 316L Stainless Steel Lattice Sandwich Structure Formed by Selective Laser Melting[J].Journal of Netshape Forming Engineering,2023,15(5):71-78. |
| 选区激光熔化成形的316L不锈钢点阵夹层结构的力学性能和能量吸收性能研究 |
| Mechanical Properties and Energy Absorption Properties of 316L Stainless Steel Lattice Sandwich Structure Formed by Selective Laser Melting |
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| DOI：10.3969/j.issn.1674-6457.2023.05.009 |
| 中文关键词: 选区激光熔化 316L不锈钢 点阵夹层结构 力学性能 能量吸收性能 |
| 英文关键词: selective laser melting 316L stainless steel lattice sandwich structure mechanical property energy absorption property |
| 基金项目:国家自然科学基金(52001038);重庆市自然科学基金(cstc2019jcyj?msxmX0787);重庆市教育委员会科学技术研究项目(KJQN201900712);重庆交通大学研究生科研创新项目(YYK202205) |
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| 中文摘要: |
| 目的 以选区激光熔化(SLM)成形的316L不锈钢点阵夹层结构为研究对象，研究单一、混合芯层对点阵夹层结构力学性能和能量吸收性能的影响，为轻质高强耐撞点阵夹层结构提供设计依据。方法 通过SLM成形技术，以316L不锈钢粉末为原材料，制备点阵夹层结构，利用扫描电镜对SLM成形的点阵夹层结构几何结构特征进行观察，利用准静态压缩实验对点阵夹层结构的力学性能和能量吸收性能进行研究。结果 在选定的SLM成形工艺参数下，SLM成形的点阵夹层结构芯层的连接杆表面存在一定的粗糙度且斜向连接杆的表面粗糙度比竖直连接杆的表面粗糙度大。在SLM成形的点阵夹层结构中，混合点阵夹层结构BFB和FBF的弹性模量分别为2 525.7 MPa和2 493.8 MPa，屈服强度分别为36.3 MPa和38.3 MPa，能量吸收分别为16 J和17.2 J，比吸能分别为1.21 J/g和1.36 J/g，其弹性模量、屈服强度、能量吸收和比吸能均优于单一BCCZ点阵夹层结构的。在准静态压缩过程中，BFB和FBF这2种混合点阵结构芯层的变形模式不同于单一BCCZ点阵结构芯层的。结论 与单一点阵夹层结构相比，2层BCCZ布置在中心、2层FCCZ位于上下面板旁边的FBF混合点阵夹层结构的能量吸收性能有所提高。 |
| 英文摘要: |
| The work aims to take 316L stainless steel lattice sandwich structure formed by selective laser melting (SLM) as the research object, to study the effects of single lattice structure core and hybrid lattice core on its mechanical properties and energy absorption to provide a design basis for the lightweight, high-strength and impact resistant lattice sandwich structure. With SLM forming technology, 316L stainless steel powder was used as raw material to prepare a lattice sandwich structure. The geometric structure characteristics of the SLM formed lattice sandwich structure were observed by scanning electron microscope. The mechanical properties and energy absorption properties of the lattice sandwich structure were measured by quasi-static compression test. Under the selected SLM forming process parameters, the surface of the SLM formed lattice sandwich structure connecting rod had a certain roughness, and the surface roughness of oblique connecting rod was greater than that of vertical connecting rod. Among the lattice sandwich structures formed by SLM, the elastic modulus of the mixed lattice sandwich structure BFB and FBF was 2 525.7 MPa and 2 493.8 MPa, the yield strength was 36.3 MPa and 38.3 MPa, the energy absorption was 16 J and 17.2 J, and the specific energy absorption was 1.21 J/g and 1.36 J/g, respectively. The elastic modulus, yield strength, energy absorption and specific energy absorption of the mixed lattice sandwich structure BFB and FBF were better than those of the single BCCZ lattice sandwich structure. During the quasi static compression process, the deformation modes of the core layers of BFB and FBF hybrid lattice structures were different from those of the single BCCZ lattice structure. The FBF hybrid lattice sandwich structure with two layers of BCCZ arranged in the center and two layers of FCCZ located next to the upper and lower panels can improve the energy absorption property of a single lattice sandwich structure. |
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