【摘要】：采用激光熔覆技術(shù)制備FeCrNiCoMnB_x高熵合金涂層,研究了硼含量對(duì)激光熔覆FeCrNiCoMnB_x高熵合金涂層的組織結(jié)構(gòu)、硬度和摩擦磨損性能的影響,以及硼化物中層錯(cuò)形成機(jī)制。結(jié)果表明:涂層均由簡(jiǎn)單fcc結(jié)構(gòu)固溶體和硼化物兩相組成。當(dāng)硼含量x≤0.75時(shí),生成的硼化物以(Cr,Fe)_2B相為主;而當(dāng)硼含量x=1時(shí),生成大量的(Fe,Cr)_2B相。隨著硼含量的增加,涂層中的硼化物含量增加,硬度增大,耐磨性能增強(qiáng)。硼化物(Fe,Cr)_2B相在(110)面存在大量堆垛層錯(cuò)。硼化物中的層錯(cuò)是(Fe,Cr)_2B相通過(guò)(110)面的層錯(cuò)(滑移距離為1/4[111])方式而向(Cr,Fe)_2B相轉(zhuǎn)變而產(chǎn)生。
[Abstract]:FeCrNiCoMnB_x high entropy alloy coating was prepared by laser cladding. The effect of boron content on the microstructure, hardness and friction and wear properties of laser coated FeCrNiCoMnB _ x high entropy alloy coating, as well as the formation mechanism of interlayer fault of borided alloy coating, were studied. The effect of boron content on the microstructure, hardness and friction and wear properties of FeCrNiCoMnB _ x high entropy alloy coating was studied. The results show that the coatings are composed of simple fcc solid solution and boride. When boron content x 鈮，

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