谢红波.Ti元素对AlFeCrCoCuTi多组元高熵合金的组织及耐磨性能影响[J].稀有金属材料与工程,2016,45(1):145~151.[xiehongbo.Effect of Ti addition on the microstructure and wear resistance of AlFeCrCoCuTiX high-entropy alloys[J].Rare Metal Materials and Engineering,2016,45(1):145~151.]
Ti元素对AlFeCrCoCuTi多组元高熵合金的组织及耐磨性能影响
投稿时间:2014-02-28  修订日期:2014-10-09
中文关键词:  高熵合金  组织结构  金属间化合物  回火  耐磨性
基金项目:国家自然科学基金资助项目(511610065)
中文摘要:
      研究了非自耗电弧熔炼AlFeCrCoCu,AlFeCrCoCuTi多组元高熵合金以及AlFeCrCoCuTi合金800℃回火后的组织、硬度及耐磨性能。研究发现,相比于AlFeCrCoCu合金,随着Ti的加入,AlFeCrCoCuTi合金组织结构趋于复杂,由之前简单的BCC FCC相变为由富含Al、Co、Ti的BCC1相和富含Fe、Cr的(α-Cr,Fe)BCC2相的枝晶共晶组织和晶间富Cu的FCC相以及晶间富含Cr2Ti和Fe2Ti金属间化合物的ω析出相共同组成。Ti的加入,析出的Cr2Ti和Fe2Ti的金属间化合物起到了强化作用,提高了合金的硬度。合金具有很强的抗回火软化能力。合金的摩擦磨损测试主要以黏着磨损为主,金属间化合物析出强化作用提高了合金的耐磨性,而回火后的合金耐磨性能更优。主要原因是随着摩擦时间的增加,回火后的合金表面上生成了一层氧化物附着在摩擦表面,提高了合金的耐磨性。
Effect of Ti addition on the microstructure and wear resistance of AlFeCrCoCuTiX high-entropy alloys
英文关键词:high-entropy alloy  microstructure  intermetallic compound  tempering treatment  wear resistance
英文摘要:
      The microstructure of AlFeCrCoCuTiX (x=0,1) high-entrophy alloys fabricated by an arc remelter with as-cast structures and 800℃ tempering treated structure were investigated by XRD,SEM,EDS and DSC. The alloys wear resistance also be tested. The result show that the AlFeCrCoCu high-entrophy alloy can posses face-centered cubic (FCC) and body-centered cubic (BCC), and with the addition of titanium, the AlFeCrCoCuTi high-entrophy alloy was composed of primary dendrite phase ( The β phase rich in Al、Co、Ti and the α phase rich in Fe、Cr eutectic structure) , interdendrite phase rich in Cu and the precipitated phase that rich in Cr2Ti,Fe2Ti intermetallic compounds. With the addition of titanium,The precipitation intermetallic compound reinforced the metal,and the alloys hardness was improved. The alloys exhibits a superior resistance to temperature and softening property. The alloy was adhesive wear behaviors, the addition of Ti, due to the effect of precipitation strengthening of the precipitated phase, the alloys wear resistance is improved. And the 800 ℃ tempering alloy wear-resisting performance is more better than that of the as-cast alloy. The main reason is that with the increase of friction time, the 800 ℃ tempering alloy generateed a layer of oxide on the surface and attached to the friction surface, improve the wear resistance of the alloy.
作者单位E-mail
谢红波 桂林电子科技大学材料科学与工程学院 1061969193@qq.com 
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