摘要
采用选区激光熔化(SLM)工艺制备了Ti6Al4V合金,并研究了激光能量密度(LED)对其致密度、显微硬度、压缩强度和塑性的影响。探究了N浓度对钛基复合材料组织结构和力学性能的影响规律。结果表明:SLM制备Ti6Al4V合金的最佳LED工艺窗口为84.8~163.6 J/mm^(3)。在最佳LED窗口内,在不同N浓度(3%、10%、30%,体积分数)工作气氛中,以气-液反应方式SLM制备了Ti N_(2)为增强相的Ti6Al4V基复合材料。其中,3%的N_(2)工作气氛中SLM成形的复合材料的强度和塑性同时得到提升,阐述了其强韧化机制。
The Ti6Al4V alloys were fabricated by selective laser melting(SLM)tech nology.The effect of laser energy density(LED)on the relative density,microhardness,compression strength and plasticity of the Ti6Al4V alloys was studied.Effects of Nconcentration on microstructure and mechanical properties of the Ti6Al4V matrix composites were studied.The results show that the optimum LED processing window for SLM of Ti6Al4V alloys is in the range of 84.8~163.6 J/mm^(3).In the optimum LED window,the TiN reinforced Ti6Al4V matrix composites were fabricated by SLM in different N_(2)concentrations(3vol%,10vol% and 30vol%)atmospheres based on gas-liquid reaction.The composite fabricated by SLM in 3vol% N_(2)atmosphere exhibits a good combination of high strength and high plasticity.The strengthening and toughening mechanisms were studi ed.
作者
朱磊
吴文杰
范树迁
张凯旺
魏文猴
Zhu Lei;Wu Wenjie;Fan Shuqian;Zhang Kaiwang;Wei Wenhou(Chongqing Key Laboratory of Additive Manufacturing Technology and Systems,Chongqing Institute of Gre en and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China;School of Physics and Optoelectronics,Xiangtan University,Xiangtan 411105,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2022年第6期2151-2160,共10页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51901220)
重庆市自然科学基金面上项目(cstc2021jcyj-msxmX0435)。
关键词
选区激光熔化
钛基复合材料
激光能量密度
TIN
气-液反应
selective laser melting
titanium matrix composites
laser energy density
TiN
gas-liquid reaction
