本文選題：高熵合金 + 微觀組織��； 參考：《沈陽工業(yè)大學(xué)學(xué)報》2017年02期

【摘要】：為了研究一種能夠吸收γ射線的含W合金的性能,按照等摩爾比設(shè)計了一種FeTiNbMoW五組元高熵合金.利用X射線衍射儀、掃描電子顯微鏡、能譜儀、顯微硬度計、密度儀和萬能力學(xué)試驗機對合金的晶體結(jié)構(gòu)、微觀組織、成分、硬度、密度和壓縮性能進行了分析.結(jié)果表明,FeTiNbMoW高熵合金組織由簡單BCC固溶體基體和分布其上的少量金屬間化合物組成.BCC結(jié)構(gòu)的實際晶格常數(shù)為0.315 5 nm,組織形貌為典型枝晶組織.枝晶硬度和枝晶間硬度分別為830.05和793.04 HV.合金的實測密度為10.7 g/cm3,略高于其理論值10.21 g/cm3.室溫下合金的抗壓強度和對應(yīng)塑性應(yīng)變分別為604 MPa和3.19%.合金呈粉末性斷裂,其斷裂機制為解理斷裂.
[Abstract]:In order to study the properties of a W-containing alloy capable of absorbing 緯 -ray, a five-component high entropy FeTiNbMoW alloy was designed according to the equal molar ratio.The crystal structure, microstructure, composition, hardness, density and compressive properties of the alloy were analyzed by means of X-ray diffractometer, scanning electron microscope, energy spectrometer, microhardness tester, densitometer and universal mechanical tester.The results show that the microstructure of FeTiNbMoW high entropy alloy consists of a simple BCC solid solution matrix and a small amount of intermetallic compounds distributed on it. The actual lattice constant of the structure is 0.315 nm, and the microstructure is a typical dendritic structure.The dendritic hardness and interdendritic hardness were 830.05 and 793.04 HV, respectively.The measured density of the alloy is 10.7 g / cm ~ (-3), slightly higher than its theoretical value of 10.21 g / cm ~ (3).The compressive strength and plastic strain of the alloy at room temperature are 604 MPa and 3.19 respectively.The alloy shows powder fracture and its fracture mechanism is cleavage fracture.
【作者單位】： 沈陽工業(yè)大學(xué)材料科學(xué)與工程學(xué)院;沈陽鑄造研究所新技術(shù)研究中心;
【基金】：沈陽市科技計劃項目(F14-231-1-22)
【分類號】：TG139
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本文編號：1772450