首页|原位表面改性的纳米WC/AlSi10Mg合金增强机制

原位表面改性的纳米WC/AlSi10Mg合金增强机制

扫码查看
原文链接
  • 万方数据
  • 维普
采用静电自组装工艺合成-系列不同纳米WC含量的表面改性AlSi10Mg粉末,并使用激光选区熔化(SLM)技术制备纳米WC/AlSi10Mg复合材料.结果表明,SLM制备的纳米WC/AlSi10Mg材料中形成多种Al-W金属间化合物相,通过(002)α(Al)//(104)Al5w的取向关系,证实具有4.7％的低晶格失配度的Al/Al5W可形成良好共格界面.纳米WC颗粒和A1-W相可促使柱状晶转变为等轴晶,获得精细的等轴晶组织.同时,SLM制备的3％(质量分数)纳米WC/AlSi10Mg复合材料具有最优的力学性能,抗拉强度为(464.1±8.68)MPa,伸长率为(5.6±0.95)％.此外,与其他WC/AlSi10Mg复合材料相比,SLM制备的3％WC/AlSi10Mg样品的平均摩擦因数和磨损率最低,分别为0.429和3.842×10-5 mm3/(N·m).力学和磨损性能的提升主要归因于晶粒细化和第二相析出强化作用.
Reinforcing effects of nano-WC in AlSi10Mg alloy assisted by in-situ surface modification approach
A series of nano-WC surface modified AlSi10Mg powders with different WC contents were synthesized by the electrostatic assembly method.After the selective laser melting(SLM)processing,various Al-W intermetallics were in-situ formed in the SLM nano-WC/AlSi10Mg composites.A well-coherent Al/Al5W interface with a low lattice mismatch of 4.7％was confirmed with an orientation relationship of(002)α(Al)//(104)Al5w.The nano-WC particles and Al-W intermetallics triggered the columnar-to-equiaxed transition,leading to a fine equiaxed microstructure.As a result,the SLMed 3 wt.％nano-WC/AlSi10Mg composites showed remarkable mechanical properties,with an ultimate tensile strength of(464.1±8.68)MPa and elongation of(5.6±0.95)％.Additionally,the SLMed 3 wt.％WC/AlSi10Mg samples also achieved the lowest average coefficient of friction(0.429)and wear rate of 3.842×10-5mm3/(N.m)compared to other WC/AlSi10Mg composites.The remarkable mechanical and wear properties are ascribed to fine-grain and second-phase strengthening.

in-situ modificationselective laser meltingnano-WCAlSi10Mgmechanical properties

易江龙、廖汉林、常成、闫星辰、刘敏、周克崧

展开 >

广东工业大学材料与能源学院,广州 510006

广东省科学院新材料研究所,现代材料表面工程技术国家工程实验室,广东省现代表面工程技术重点实验室,广州 510651

ICB UMR 6303,CNRS,Univ.Bourgogne Franche-Comté,UTBM,90010,Belfort,France

原位改性 激光选区熔化 纳米WC AlSi10Mg 力学性能

Technical Project of Guangdong Province,ChinaTechnical Project of Guangdong Province,ChinaGDAS' Project of Science and Technology Development,ChinaSciences Platform Environment and Capacity Building Projects of GDAS,ChinaKey R&D Program of Guangdong Province,ChinaGuangdong Special Support Program,ChinaGuangdong Basic and Applied Basic Research Fund,ChinaGuangdong Basic and Applied Basic Research Fund,China

2020B0909230022021A15150117562021GDASYL-202103020062021GDASYL-202101020052020B0909230022019BT02C6292020A15151110312021A1515010939

2024

10.1016/S1003-6326(23)66381-2

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(1)
  • 31