4.7 Article

Ultra-high specific strength Ti6Al4V alloy lattice material manufactured via selective laser melting

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2022.142956

关键词

Selective laser melting; Ti6Al4V lattice Structure; Optimization structure; High-density dislocation; Compression performance

资金

  1. National Natural Science Foundation of China [51671152, 51874225, 51504191]

向作者/读者索取更多资源

This article utilizes selective laser melting (SLM) to manufacture Ti6Al4V lattice structures with different aspect ratios, and investigates their performance. The results show that the additively manufactured Ti6Al4V lattice material has an ultra-high specific strength, mainly due to high density dislocations and structural optimization.
Additive manufacturing technology has the characteristics of rapid melting/solidification and precise forming of complex structural integrated parts, which is not available in traditional manufacturing methods. Herein we utilize selective laser melting (SLM) to manufacture Ti6Al4V lattice structures with different aspect ratios. The results show that the additively manufactured Ti6Al4V alloy lattice material has an ultra-high specific strength of similar to 326.6 MPa/(g/cm(3)), surpassing 1.7 times the specific strength of Ti6Al4V alloy bulk material. The mechanism of the specific strength enhancements discussed. On the one hand, the Ti6Al4V lattice material produced by SLM is mainly composed of alpha ' martensite with a high density of dislocations. The quantitative calculation by Bailey Hirsch formula shows that the ratio of high density dislocation contributed to the strength reaches 29.73% of the total strength. On the other hand, structural optimization is also a factor that makes the SLM-produced lattice material show high specific strength. When the aspect ratio is 5, the compressive strength of the optimized structure is 295.81% higher than that of the uniform structure, while the density is only 79.21% higher. The optimized structure and unique microstructure endow SLM-produced Ti6Al4V lattice material with outstanding compression properties.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据