Elastic Modulus and Stress Analysis of Porous Titanium Parts Fabricated by Selective Laser Melting

Elastic Modulus and Stress Analysis of Porous Titan ium Parts Fabricated by Selective Laser Melting Junchao Li*, Yanyan Zang and Wei Wang

【摘要】Abstract: The mismatch of elasticity modulus has limited the application of titanium alloys in medical implants, and porous structures have been proved effective to deal with this problem. However, the manufacturing of porous structures has been restricted from conventional technologie s. In this study, selective laser melting (SLM) technology was employed t o produce a set of Ti-6Al-

4V porous samples based on cubic lattices with varying size of strut wid th from 200 μm to 600 μm. Then the compression tests were conducted to analyze the influence of the strut width on the elasticity modulus an d the ultimate strength. The result shows both of them increases linearly with the growth of strut width or with the decrease of porosity, and the elasticity modulus of porous parts is largely reduced and actually meets the requirement of clinical application. Additionally, a finite element mo del was established to verify the un-

uniform stress distribution of porous parts. It reveals that fractures alwa ys initially occur at the vertical struts along the force direction which suf fer from the main deformation.

【期刊名称】哈尔滨工业大学学报（英文版）