摘要
采用选区激光熔化(SLM)技术成形TC4钛合金均匀与梯度点阵结构,研究了不同杆径(0.8~1.2 mm)、单胞类型(bcc、fcc、fbcc)、添加竖向支杆(bccz、fccz、fbccz)对均匀与梯度点阵结构压缩性能及能量吸收的影响规律。结果表明:1.2 mm杆径点阵结构性能最优;fccz与fbccz点阵结构分别在同质量与同体积下具有最佳的性能;竖向支杆的存在能够大幅地增强点阵结构在特定加载条件下的性能;均匀点阵结构在失效前的压缩性能与能量吸收优于相同相对密度及应变的梯度点阵结构。由于梯度点阵结构逐层断裂的特性,在50%及更大应变的状态下具有更优的性能,更适于应用在吸能装置。
The uniform and gradient lattice structures of TC4 titanium alloy were fabricated using SLM technology.The effects of different rod diameters(ranging from 0.8 mm to 1.2 mm),cell types(bcc,fcc,fbcc),and adding vertical struts(bccz,fccz,fbccz) on the compressive properties and energy absorption of both uniform and gradient lattice structures were investigated.The results indicate that the lattice structure with 1.2 mm in rod diameter exhibits the best performance.The fccz and fbccz lattice structures exhibit the best performance in terms of both mass and volume efficiency,respectively.The presence of vertical struts significantly enhances the performance of lattice structures under specific loading conditions.Compression performance and energy absorption of uniform lattice structures before failure are better than those of gradient lattice structures with the same relative density and strain.Due to the layer-by-layer fracture characteristic of gradient lattice structures,they have better performance under 50% and larger strain conditions,and they are more suitable for application in energy absorption devices.
作者
吴佳豪
徐峰
王欢乐
景然
孟凡莹
Wu Jiahao;Xu Feng;Wang Huanle;Jing Ran;Meng Fanying(School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723000,China;Xi’an Heavy Pubai Coal Mine Machinery Co.,Ltd,Weinan 715500,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2024年第7期1953-1961,共9页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51701111)。
关键词
选区激光熔化
点阵结构
TC4钛合金
压缩性能
吸能特性
selective laser melting
lattice structure
TC4 titanium alloy
compressive properties
energy absorption characteristic
