选区激光熔化TiC/AlMgSc复合材料组织与性能研究
Microstructure and Properties of TiC/AlMgSc Composites by Selective Laser Melting
杨倩 1张建勋 1孙苗 1李惠 1华文娟1
作者信息
- 1. 西安增材制造国家研究院有限公司,陕西西安 710300
- 折叠
摘要
采用选区激光熔化成形技术制备了 TiC/AlMgSc铝基复合材料,通过X射线衍射仪、扫描电镜以及万能试验机分析了铝基复合材料相组成、微观形貌、再结晶分布以及力学性能,并理论计算了位错密度和TiC增强相对合金强度的提升值.结果表明:TiC增强颗粒的添加使TiC/AlMgSc复合材料内部位错密度增加了 105％,达到0.72×1014m-2;小于1 μm晶粒和亚晶界比例显著增加,再结晶程度降低;抗拉强度、屈服强度和延伸率分别达到611 Mpa、589 Mpa、11.0％,相比AlMgSc合金屈服强度提升了 70 Mpa,延伸率下降了 1.1％.
Abstract
TiC/AlMgSc aluminum matrix composites were fabricated by selective laser melting.The phase composition,microstructure,recrystallization distribution and mechanical properties of the aluminum matrix composites were analyzed by X-ray diffraction,scanning electron microscope and universal testing tensile machine.The increase in strength of the alloy contributed by dislocation density and TiC strengthened phase was calculated theoretically.The results show that the dislocation density of TiC/AlMgSc composites increases by 105％to 0.72× 1014 m-2 with the addition of TiC reinforced particles,the proportion of＜1 μm grains and sub-grain boundaries increases significantly,and the degree of recrystallization decreases.The tensile strength,yield strength and elongation reach 611 MPa,589 MPa and 11.0％,respectively.Compared with those of AlMgSc alloy,the yield strength of the composites increases by 70 MPa while the elongation decreases by 1.1％.
关键词
选区激光熔化/铝基复合材料/AlMgSc合金/显微组织/力学性能Key words
selective laser melting/aluminum matrix composite material/AlMgSc alloy/microstructure/mechanical properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据