摘要
研究了真空电弧熔炼AlFeCrCoCu高熵合金的微观组织及回火工艺对合金组织、硬度和合金在3.5%NaCl溶液中耐蚀性能的影响。结果表明,AlFeCrCoCu合金是典型的树枝晶结构,枝晶是富含Al、Fe、Cr、Co元素的BCC相,晶间是富含Cu元素的FCC相。合金熔点在1 380℃左右,1 050℃左右晶间富Cu相开始发生相变。随回火温度的升高,晶粒开始长大,直至1 000℃左右晶粒变得粗大。合金具有较强的抗回火软化能力。电化学测试结果表明,合金的耐蚀性均优于304不锈钢,而800℃回火组织的耐蚀性能最好。
The microstructure was studied of AlFeCrCoCu high-entropy alloy prepared by vacuum arc melting.Effects were investigated of tempering process on alloy microstructure,hardness and corrosion resistance in 3.5% NaCl solution.The results show that the alloy has dendrite microstructure,the dendrite is Al,Fe,Cr,Co-rich BCC phase and intergranular microstructure is Cu-rich FCC phase.Alloy melting point is about 1 380 ℃,and intergranular Cu-rich phase begins phase transition at about 1 050 ℃.With the increase of tempering temperature,the grains begin to grow up until develop into coarse grains at about 1 000℃.The alloy exhibits a superior resistance to temper softening.Electrochemical test results show that the alloy has better corrosion resistance than 304 stainless steel,and 800 ℃ temper microstructure has the highest corrosion resistance.
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2015年第4期51-56,共6页
Rare Metals and Cemented Carbides
基金
国家自然科学基金(511610065)
