Al对激光熔化沉积VCoNi系中熵合金组织与性能的影响
Effect of Al on microstructure and mechanical properties of medium entropy alloy in VCoNi system by laser melting deposition
喻会 1赵琳 1彭云 1曹洋 1马成勇 1田志凌1
作者信息
- 1. 钢铁研究总院有限公司,北京 100081
- 折叠
摘要
采用激光熔化沉积技术(Laser Melting Deposition,LMD)制备了 VCoNi和Al7(VCoNi)95中熵合金,研究了中熵合金显微组织和力学性能.结果表明,VCoNi中熵合金为单一的FCC固溶体结构,而Al7(VCoNi)93中熵合金为FCC+BCC双相固溶体结构,Al元素促进了 BCC结构的形成.Al对VCoNi系中熵合金力学性能的影响显著,提高了合金硬度和强度,而降低了塑性和韧性.与VCoNi中熵合金比较,A17(VCoNi)93中熵合金显微硬度由317HV01增加至370HV0.1,抗拉强度由964 MPa增大至1 138MPa,而室温冲击韧性值由88 J/cm2降低至 60.5 J/cm2.
Abstract
VCoNi and Al7(VCoNi)93 medium entropy alloys were manufactured by Laser Melting Deposition(LMD),and the microstructure and mechanical properties of the medium entropy alloys were investigated.The re-sults show that the VCoNi medium entropy alloy is a single FCC solid solution structure,while the Al7(VCoNi)93 medium entropy alloy is an FCC+BCC duplex solid solution structure,and the Al element promotes the formation of BCC structure.The influence of Al on the mechanical properties of VCoNi alloy is significant,which increases the hardness and strength of the medium entropy alloy,but decreases the ductility and toughness.Compared with VCoNi,the microhardness of Al7(VCoNi)93 increases from 317HV0.1 to 370HV0.1,the tensile strength increases from 964 MPa to 1 138 MPa,and the impact toughness decreases from 88 J/cm2 to 60.5 J/cm2 at room temperature.
关键词
VCoNi中熵合金/激光熔化沉积/Al合金化/微观组织/力学性能Key words
medium entropy alloys/Laser Melting Deposition/Al-alloying/microstructure/mechanical property引用本文复制引用
基金项目
国家重点研发计划资助项目(2021YFB3702500)
钢铁研究总院有限公司自主投入研发专项(事23H60440ZD)
出版年
2024
NETL
NSTL
万方数据