钛合金三维点阵结构制备工艺与压缩性能研究
发布时间：2019-03-06 10:19
【摘要】：提出了一种钛合金三维点阵夹层结构制备方法,采用超塑成形/扩散连接工艺(SPF/DB)制备了金字塔型、四面体型、X型三维点阵夹层结构,在SPF/DB制备工艺中,采用的是五层板材,四层超塑成形工艺,成形出的结构是三层夹层结构,其中扩散连接工艺为:920℃/2 MPa/2 h,超塑成形工艺为:920℃/2 MPa/2 h。通过压缩试验测试了不同点阵结构类型、单元尺寸、点阵层数的压缩性能,并进行了对比分析。研究表明,钛合金三维点阵结构在压缩变形机制主要包括:弹性变形、弹性屈曲、塑性屈曲、筋条断裂,这些变形机制导致点阵结构的压缩曲线呈现应力波动的特征。四面体点阵结构具有最高的抗压强度,金字塔型点阵结构具有最高的抗压模量,X型点阵结构的抗压强度最小,抗压模量居中。随着单元尺寸和点阵层数的增加,钛合金三维点阵的抗压强度和抗压模量迅速降低。
[Abstract]:A method for fabricating 3D lattice sandwich structure of titanium alloy was proposed. Pyramid, tetrahedral and X dimensional lattice sandwich structures were fabricated by superplastic forming / diffusion bonding (SPF/DB) process. In the process of SPF/DB fabrication, three dimensional lattice sandwich structures were fabricated. Five-layer plate and four-layer superplastic forming process are adopted. The formed structure is three-layer sandwich structure, in which diffusion bonding process is 920 鈩，
本文编号：2435441
[Abstract]:A method for fabricating 3D lattice sandwich structure of titanium alloy was proposed. Pyramid, tetrahedral and X dimensional lattice sandwich structures were fabricated by superplastic forming / diffusion bonding (SPF/DB) process. In the process of SPF/DB fabrication, three dimensional lattice sandwich structures were fabricated. Five-layer plate and four-layer superplastic forming process are adopted. The formed structure is three-layer sandwich structure, in which diffusion bonding process is 920 鈩，
本文编号：2435441
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2435441.html
