引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 21次   下载 27 本文二维码信息
码上扫一扫!
分享到: 微信 更多
一种Ti-6Al-4V功能梯度网状结构的设计与压缩性能
邵世友, 李东, 曾春杰, 张涛
上海工程技术大学, 上海 201620
摘要:
通过电子束选区熔化制造具有高孔隙率的多孔Ti-6Al-4V结构,旨在用于替代人类松质骨.开放的网状结构能够提供骨组织向内生长的空间,因此能更好的起到固定的作用.利用计算机辅助设计(CAD),制备一种低密度(0.78 g/cm3),高孔隙率(82%),弹性模量为2.7 GPa的功能梯度网状结构.结果表明,制备的功能梯度网状结构与致密件相比,具有和松质骨接近的的弹性模量,能够有效的避免应力屏蔽效应.此外,通过增加层与层之间的厚度,可以有效的防止裂纹在网状结构中快速扩展,提高安全性.此结构的屈服强度为62 MPa,试样的组织中的细小的α’相有利于提高植入物的寿命.
关键词:  电子束选区熔化  网状结构  孔隙率  植入物
DOI:10.12073/j.hjxb.2019400199
分类号:TG47
基金项目:
Design of a Ti-6Al-4V functionally graded network structure and its compression properties
SHAO Shiyou, LI Dong, ZENG Chunjie, ZHANG Tao
Shanghai University of Engineering Science, Shanghai 201620, China
Abstract:
The porous Ti-6Al-4V structure with high porosity is produced by electron beam selective melting, which is intended to replace human cancellous bone. The open mesh structure can provide space for the in-growth of bone tissue that it can play a better role in fixing. A computer aided design (CAD) was used to prepare a functionally graded network with low density (0.78 g/cm3), high porosity (82%) and elastic modulus of 2.7 GPa. The results show that this structure has a modulus of elasticity which is similar to the cancellous bone compared with the dense part. It can effectively avoid the stress shielding effect. In addition, by increasing the thickness between the layers, it is possible to effectively prevent cracks from rapidly expanding in the mesh structure and improve safety. The yield strength of this structure is 62 MPa. The fine α' phase in the microstructure of the sample is beneficial to improve the life of the implant.
Key words:  electron beam selective melting  network structure  porosity  implant