摘要
激光选区熔化技术(SLM)是一种精密增材制造工艺方法,它利用高亮度激光逐层熔化无粘结剂的金属粉末,可制造各种复杂零件。为评价SLM技术的特征,利用SLM技术制备了Ti-6Al-4V合金样件,分析了其表面特征、组织、显微硬度和拉伸性能。结果显示:沉积态Ti-6Al-4V合金样件的表面粗糙度约为Ra=10μm;存在明显外延生长,组织为柱状晶,平行和垂直生长方向的组织呈现各向异性,而显微硬度差异不显著。SLM成形Ti-6Al-4V alloy的拉伸性能与锻件标准相当。
Selective laser melting(SLM) is a precise additive manufacturing process that the metallic powders without binder are melted layer by layer to complex components using a high bright fiber laser.In the paper,Ti-6Al-4V alloy was fabricated by SLM and its surface features,microstructure,micro-hardness and tensile properties were investigated in order to evaluate the SLM process.The results show that the surface roughness of deposited Ti-6Al-4V alloy block samples is about Ra=10 μm.In addition,there exists anisotropy between the horizontal and vertical section microstructure due to the occurrence of epitaxial growth,and the former microstructure seems equal-axis and the latter is column.Moreover,there is little difference in micro-hardness between the horizontal and vertical sections.Furthermore,the tensile properties of fabricated Ti-6Al-4V alloy by SLM are equal to the forged standard ones.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第S2期209-212,共4页
Rare Metal Materials and Engineering
基金
KZ(110305114)
关键词
增材制造
钛合金
激光选区熔化
外延生长
additive manufacturing
titanium alloy
selective laser melting
microstructure
epitaxial growth
tensile properties
