摘要
采用激光熔覆法制备Al_xCoCrFeNiTi_(0.5)(x=0.2,0.5,1.0,1.5)高熵合金涂层,研究Al含量对涂层组织、硬度及耐磨性的影响。结果表明,随铝含量x变化,相结构由FCC变成BCC结构,并且生成Al_(80_Cr_(13)Co_7和Al95Fe4Cr复杂相。当Al含量增加到1.0时,出现典型调幅分解组织,枝晶和枝晶间成分分布较均匀。随Al含量增加,硬度值提高,最高达到989HV0.5。Al1.0CoCrFeNiTi_(0.5)的耐磨性与U75V相比,磨损量减少了25%,摩擦系数减小了29%。
Effects of Al content on microstructure,hardness and wear resistance of AlxCoCrFeNiTi0.5（ x = 0. 2,0. 5,1. 0 and 1. 5） highentropy alloy coating prepared by laser cladding were investigated. The results show that the phase structure can transform from FCC to BCC structure with the increase of Al content,and then Al80Cr13Co7 and Al95Fe4Cr complicated phases are formed. Typical spinodal decomposition structure with uniform composition can be found when x value of Al increases to 1. 0. The hardness value of the alloy coating enhances with increasing Al content,the highest hardness value reaches up to 989 HV0. 5. The abrasion loss of Al1. 0Co Cr Fe Ni Ti0. 5is reduced about 25%,and the friction coefficient is reduced about 29% comparing with that of U75 V alloy.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第12期185-189,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51201085)
辽宁省科学技术计划资助项目(2012415026)
全国大学生创新创业训练计划(201310146014)
辽宁科技大学创新团队项目(2104TD02)
关键词
高熵合金
耐磨性
激光熔覆
微观结构
high-entropy alloy
wear resistance
laser cladding
microstructure
